JB/T 9200-1999 Flame quenching and tempering treatment of steel parts
Some standard content:
ICS25.100
Machinery Industry Standard of the People's Republic of China
JB/T9200-1999
Flame hardening and tempering of iron and steel parts
Issued on 1999-06-24
National Bureau of Machinery Industry
Implementation on 2000-01-01
JB/T9200-t999
This standard revise the standard J3604-88 Flame hardening and tempering of iron and steel parts. Editorial revisions have been made in accordance with relevant regulations, and the main technical content has not changed. This standard replaces 2136004-88 from the date of implementation. The standard is proposed and managed by the National Heat Treatment Standardization Committee. The responsible drafting unit of this standard is: Beijing Automotive Industry College Huairou Branch: The responsible drafters of this standard are: An Zhengkun, Jiao Daxin. This standard was first issued on May 23, 198%. Scope
Mechanical Industry Standard of the People's Republic of China
Flame hardening and tempering treatment of steel parts
Flame hardening and tempering treatment of steel parts JB/T9200—1999
Replaces ZB J36 004—88
This standard specifies the basic requirements for quality control and labor protection of flame hardening and tempering of parts. It is applicable to the treatment of steel parts in hot equipment after quenching, and is also applicable to the treatment of flame damage. 2 Reference Standards
The following standards contain provisions that are referenced in this standard and are used as standard provisions. When this standard was published, the version indicated was valid. All standards are subject to revision and the parties using this standard should explore the possibility of using the latest version of the above standards. GB/T 334....19R7
G:4340—1984
G:4341—1984
GB/T 56[7-.-1985
GB13733---1995
JB/T2009—1999
YE$148-:99
Method for determining the depth of debonding layer of steel
Metal Rockwell hardness test method
Metal Vickers hardness test method
Method for testing gold Shore hardness
Deepness of induction fire or fire-induced fire and effective reversal layer of steel to measure the safety and requirements of contact type radiation
Method for determining the particle size of all kinds of products| |tt||Real gas and full technical regulations
3 Workpiece
3.1L fiber material
Recommended steel embedded material pressure table 1,
Yunnan "steel state material
Carbon teaching structure
Combined method channel attachment
National Machinery Industry Bureau 1999-06-24 approved control
35,40.45,5055,60:
35Mn，4IMn,45M，5UMn,hMn：
35Mn2,40Mn245Vn2.50Mn260Mn2:35SiMm, 425.Mr.:
409,458500
40MD,45MnB,40MVB:
35Cr, 40Cr, 456r, 5G.c;
15CMm.42CIo.35CMnV,4K.rV:
4ncrvn：
40rNi. 45CrNi:
2000-01-01 solid
elastic steel
chromium bearing steel
low speed high quality carbon steel
sulfur spot steel
metallurgical tool
stainless steel
3.2 original material before treatment
JB/T 9200—1999
Table 1 (End)
65, 65Mn,55SIMn. 60S12Mn. 55siMaBGCr, GCr9, GCr15, GC95iMn, GCr15SiMa;55Ti,60TL
TT, Ta. TRM, 1y, JIU. TI), TI2; 9SiKY, 9 Mn2V.5CrMaMD.5CrNiMo:ICr13, 2C13, 3Cr13, 4Cr13;
4Cr9i2, 4Cr10Si2Ma;
2G270500, 7031017023340641;
ZG40Mn. 7n.stMn; 2G5aMn2;
ZG40Cr, ZG50CrMn,7xSC:rMnSt
ZO35SiMn
HT2X,H1250,HT300,HT350:
KT/450(,KT2550-04,KTZ650-02,KTZ700-02:QT40(-18,Q14) 15,Q[450 1,QF500-7. QT6003OT7002,QTK2. IM 2
The original material of the workpiece before processing shall be in accordance with the purpose specified in 2. Table 2 Raw materials
Material quality and test results
Grade number
Refining furnace number
Chemical composition
Control elongation test data 1
Test data of metallographic structure
Material supply status
Product particle size, decarburization layer, main chemical, non-metallic impurities, microscopic points and low magnification! Cold according to
before the class plus the test
cold, Fu broken
the initial cutting to reach
hidden first salt treatment printing type matching
normalizing fire
full annealing
spheroidizing fire
to room force with fire
1) these items can be part of the work or part of the enterprise road: JB/T9200-1999
Table 2 ( )
Ring or heat
Source connection part
When necessary, indicate the nearby
Ring or force system authorization
And indicate the extension
Design specification
Strictly note the listening degree
And indicate the energy
Detailed note
And indicate the carbon degree
Appearance, size and surface condition of the workmanship before treatment 3. 3
Contents Table 3 specifies the items,
Table 3 before treatment 1. Appearance, size and surface condition of the workpiece No. 1
Shape of the treated part
Special shape
The shape and size of the treated part
The overall processing allowance
The size is common 1.
Shape tolerance! 》
Core tolerance! :
Surface treatment of the existing parts
Treatment method!
Types of rust-proof materials!
1) This is the purpose of the description. Parts may be partially or completely omitted. Say
Since there is no crack effect, false wave, inducement, black skin, giant machine stock standard pollution parts can be attached with simple support
The main difference points spiral degree, plane shear degree, wind seat, line grab degree modification surface wheel quality mainly refers to parallel library, vertical minister, Huai Ke piece, flower placement degree, same wall straight change standard pressure with relatively large or large
3.4 Acceptance of parts before treatment
JB/T9200-1999
When accepting the treatment parts, the items specified in 3.2 and 3.3 should be accepted: 4 Treatment equipment
4.1 Gas supply room
4.1.1 The combustion gas supply device, whether it has acetylene generator, acetylene bus, or is a fuel gas supply, must be equipped with auxiliary output control device, pressure gauge and safety reading. The pressure of the combustion gas output under the stable state should be controlled within the range of 0.9×10\1.1×10*Pa, and the humidity should not be higher than 60. The water temperature of the generator should not be higher than 40°C. 4.1.2 The oxygen cylinder and the oxygen manifold are equipped with a pressure gauge and a pressure reducing valve. Under the stable state, the output oxygen pressure should be controlled within the range of 2×10-3.5×JUPa (for small items) and 5×10.-1S×10a (for large items). The pressure of the oxygen cylinder should be 210×[0:4.2 Temperature measurement cover
When handling important items, the temperature measuring element becomes a photoelectric thermometer or a portable infrared thermometer. 4.3 Cooling equipment
The high-speed cooling tank should have sufficient capacity and be equipped with appropriate circulation devices and temperature control devices. The high-speed cooling tank should be equipped with a stirring device with a certain flow rate or other devices with similar effects. 4.4 Flow machine
According to the shape and size of the workpiece, a suitable one-time quenching machine or a mobile high-speed quenching machine, or other quenching machine suitable for the position of the workpiece, can be set, but all should have the accuracy specified in Table 4. Table 4 Accuracy of quenching machine
Inspection items
Spindle taper hole slight lateral runout! !
Rotation.1 The parallelism of the line connecting the tip to the plate movement
T The maximum change in the feed speed of the workpiece
1) Insert the test pipe into the axis hole and measure at 30Dmm away from the axis surface. 2 Install a magnetic disk with a weight greater than 3km, and measure at the half-weight 150mm: 3) Measure the average value of 1 working stroke 310
4.5 Tempering equipment
0.3mm (supporting length s2000mm)
4.5.1 The temperature deviation of the effective heating zone of the tempering heating equipment shall comply with the provisions of Table 5. Table 5 Tempering heating equipment effective heating zone overflow deviation suspension
Allowable disk deviation
Applicable scope
Important parts
General parts
4.5.2 It should be equipped with an automatic recording device that can track the relationship between tempering temperature and time, and an indicator of the thermoelectric temperature measurement device. The total error of the temperature reading after correction shall comply with the provisions of Table 6.
Error indicator point cover
4.6 Equipment maintenance
JB9200--[999
Table 6 Total error of temperature indicator
Comply with the operating procedures and maintenance system, and keep relevant records to ensure the accuracy and performance of the equipment. 5 Treatment method
5.1 Determination of treatment method
After the first two parts are accepted, the appropriate treatment method should be selected according to the steel type, heat treatment, surface quality and performance requirements, treatment equipment used, and the conditions after treatment. 5.2 Inspection of injectors, flame nozzles, cooling water nozzles and other parts Inspection of injectors, flame nozzles, cooling water nozzles and flame nozzles without damage, deformation, etc. The flame hole of the flame nozzle is clear: the water hole is not blocked by dirt.
5.3T clamping
During the processing, the workpiece, flame nozzle and cooling water nozzle should maintain the correct relative position and should not be eccentric or tilted. 5.4 Formulation of annealing process specifications
5.4.1 After the treatment method is determined, the specific values of the various pre-process parameters specified in Table 7 must be determined. The annealing process specifications are shown in Table 7. The annealing process specifications include the annealing properties and the amount of flame core. The annealing method and the temperature of the cooling medium, the opening force and volume of each workpiece or each treatment period, the gas (fuel gas, single gas), the time between each front anneal, the heating time required for the workpiece, the interval between the start of the heat cycle and the start of the annealing, the time between the start of the annealing and the start of the annealing. The annealing process specifications include the use of neutral single annealing, which is composed of three components: annealing, inner annealing and outer annealing. The flame core is a small light-collecting policy. 5.4.3 According to the type, shape and size of the workpiece, select the appropriate ignition medium and its pressure and flow rate: see Table 8 for the temperature range of water, oil and ethylene water solution.
Water supply
Meng spot filter
5.5 Tempering process specification
92001990
Table 8 Water, alcohol and alcohol water solution before tempering
5.5.1 According to the material, hardness or drawing requirements of the T piece, determine the tempering temperature and tempering time: 5.5.2 The piece below the surface ignition layer should be tempered when it is collected, and the tempering time should not exceed 4 seconds. 6 Appendix T sequence
Polyene alcohol small Jisen
56.1 The residual stress generated when correcting the work partner after annealing and tempering should not affect the subsequent mechanical processing and use. If necessary, the workpiece should be treated in a manner not exceeding the tempering degree after correction. 5.6.1 When cleaning the workpiece after treatment, it should not be subject to corrosion and other harmful effects. 5.7 Records of treatment
Treatment methods, process parameters, and quality inspection results should all be recorded and signed by the author and kept for a certain period of time. Safety technical requirements
GB15735 and gas welding safety technical regulations must be avoided during operation. 6.2
The production site safety technical regulations should include the various contents specified in Table 9 Table 9 Production workplace safety technical procedures
Car gas service, fuel Placement and isolation of the gas device
Check oxygen and filter gas to reach the system of the installation. Gas sample during use. Pressure measurement
Safety measures for gas and gas warning. Ignition and shutdown procedures
1 Operation and failure measures
Explosion-proof measures for combustion equipment
Quality of workpiece after treatment
The quality of the workpiece after treatment shall meet the requirements of relevant technical standards or samples, and ensure that the error is within the allowable range. 7.1 Appearance
There should be no defects such as over-operation, flame erosion, and plastic marks. 7.2 Hardness
The range of surface hardness shall comply with the provisions of Table 10, Table 11, and Table 12. Note: IRC, HV, and HS in the table are all measured values, and there is no direct conversion system for them. The first refers to a batch of parts with the same dosage processed under the same process. 6
Factory types
General parts
Process characteristics
Push parts
--General parts
Beauty of workpieces
Mutuality
-General parts
Effective hardened layer depth
JB/T9200-1999
Gregg hardness filtering range
Surface texture
Vickers hardness independent range
On-surface measurement
Table 12 Shore hardness passive range
Surface spot
The fluctuation range of the effective hardened layer depth is not allowed to exceed the provisions of Table 13. Table 13 The fluctuation range of effective hardening layer depth is effective hardening after tt> 3.5 -5.0
pieces in the same row
pieces in the same batch
pieces in the same selection
deep medical fluctuation
7.4 Unique hardening zone specification
JB/T9200-[999
hardening zone specification diagram or relevant technical documents specified in the table, must be listed in the specification reasonable deviation, the surface of the tough piece, its non-hard edge and the non-hard end of the work is not more than the brown: large T pieces are allowed to leave soft, its width is not more than 10mm, the staggered interval should not be more than 100mm. 7.5 Metallographic structure
metallographic structure of the tough part! According to the material and performance requirements of the workpiece, it should be a normal flow-type fiber or a flow-type fiber. 7.6 Deformation
The deformation of the workpiece at the bottom of the grinding process does not affect the quality of the subsequent machining and the performance. The deformation of the workpiece is determined by negotiation between the relevant parties.
8 Quality inspection method
Sampling of the workpiece after treatment. When sampling is not difficult, simulated samples can be used as much as possible. 8.2 Defect inspection
The inspection of cracks and flaws is carried out by magnifying the continuous eye, or by using JBT4009 near-line ultra-high-frequency flaw detection. 8.3 Hardness inspection
The hardness is in accordance with the provisions of GB/T230, GB/T4340, GB/T4341. For large parts, it can be inspected by ultra-high-pressure or portable hardness testers.
8.4 After micro-hardening, the effective hardening layer depth shall comply with the provisions of GR/T5617. %5 Metallographic group inspection
The product skin, demagnetization, body level and other inspections shall comply with the provisions of YB/T5148, GB/T224, GB/13617. 8.6 Deformation measurement
The deformation can be measured by dial indicator, ruler, feeler gauge or other positioner, meter, 9 Product report
The product report shall include the following contents: 1. Customer age or medical number; 2. Material quality; 3. Quantity and weight of 1. Item; 4. Quality inspection results and conclusions; 5. Name or code of inspector; 6. Processing date: year and month.4 Flowing machine tool
According to the shape and size of the workpiece, a proper one-time blasting machine tool or a mobile blasting machine tool, or other blasting machine tools suitable for the position of the workpiece can be set, but they should have the precision specified in Table 4. Table 4 Precision of blasting machine
Inspection items
Spindle taper hole slight jump! !
Rotation.1 The moving 1 of the worktable:
Parallelism of the line connecting the tip to the plate
T The maximum change in the feed speed of the workpiece
1) Insert the inspection needle into the axis hole and measure at 30Dmm away from the axis surface. 2 Install a magnetic disk with a weight greater than 3km, and measure at the half-weight 150mm: 3) Measure the average value of 1 working stroke 310
4.5 Tempering equipment
0.3mm (supporting length s2000mm)
4.5.1 The temperature deviation of the effective heating zone of the tempering heating equipment shall comply with the provisions of Table 5. Table 5 Tempering heating equipment effective heating zone overflow deviation suspension
Allowable disk deviation
Applicable scope
Important parts
General parts
4.5.2 It should be equipped with an automatic recording device that can track the relationship between tempering temperature and time, and an indicator of the thermoelectric temperature measurement device. The total error of the temperature reading after correction shall comply with the provisions of Table 6.
Error indicator point cover
4.6 Equipment maintenance
JB9200--[999
Table 6 Total error of temperature indicator
Comply with the operating procedures and maintenance system, and keep relevant records to ensure the accuracy and performance of the equipment. 5 Treatment method
5.1 Determination of treatment method
After the first two parts are accepted, the appropriate treatment method should be selected according to the steel type, heat treatment, surface quality and performance requirements, treatment equipment used, and the conditions after treatment. 5.2 Inspection of injectors, flame nozzles, cooling water nozzles and other parts Inspection of injectors, flame nozzles, cooling water nozzles and flame nozzles without damage, deformation, etc. The flame hole of the flame nozzle is clear: the water hole is not blocked by dirt.
5.3T clamping
During the processing, the workpiece, flame nozzle and cooling water nozzle should maintain the correct relative position and should not be eccentric or tilted. 5.4 Formulation of annealing process specifications
5.4.1 After the treatment method is determined, the specific values of the various pre-process parameters specified in Table 7 must be determined. The annealing process specifications are shown in Table 7. The annealing process specifications include the annealing properties and the amount of flame core. The annealing method and the temperature of the cooling medium, the opening force and volume of each workpiece or each treatment period, the gas (fuel gas, single gas), the time between each front anneal, the heating time required for the workpiece, the interval between the start of the heat cycle and the start of the annealing, the time between the start of the annealing and the start of the annealing. The annealing process specifications include the use of neutral single annealing, which is composed of three components: annealing, inner annealing and outer annealing. The flame core is a small light-collecting policy. 5.4.3 According to the type, shape and size of the workpiece, select the appropriate ignition medium and its pressure and flow rate: see Table 8 for the temperature range of water, oil and ethylene water solution.
Water supply
Meng spot filter
5.5 Tempering process specification
92001990
Table 8 Water, alcohol and alcohol water solution before tempering
5.5.1 According to the material, hardness or drawing requirements of the T piece, determine the tempering temperature and tempering time: 5.5.2 The piece below the surface ignition layer should be tempered when it is collected, and the tempering time should not exceed 4 seconds. 6 Appendix T sequence
Polyene alcohol small Jisen
56.1 The residual stress generated when correcting the work partner after annealing and tempering should not affect the subsequent mechanical processing and use. If necessary, the workpiece should be treated in a manner not exceeding the tempering degree after correction. 5.6.1 When cleaning the workpiece after treatment, it should not be subject to corrosion and other harmful effects. 5.7 Records of treatment
Treatment methods, process parameters, and quality inspection results should all be recorded and signed by the author and kept for a certain period of time. Safety technical requirements
GB15735 and gas welding safety technical regulations must be avoided during operation. 6.2
The production site safety technical regulations should include the various contents specified in Table 9 Table 9 Production workplace safety technical procedures
Car gas service, fuel Placement and isolation of the gas device
Check oxygen and filter gas to reach the system of the installation. Gas sample during use. Pressure measurement
Safety measures for gas and gas warning. Ignition and shutdown procedures
1 Operation and failure measures
Explosion-proof measures for combustion equipment
Quality of workpiece after treatment
The quality of the workpiece after treatment shall meet the requirements of relevant technical standards or samples, and ensure that the error is within the allowable range. 7.1 Appearance
There should be no defects such as over-operation, flame erosion, and plastic marks. 7.2 Hardness
The range of surface hardness shall comply with the provisions of Table 10, Table 11, and Table 12. Note: IRC, HV, and HS in the table are all measured values, and there is no direct conversion system for them. The first refers to a batch of parts with the same dosage processed under the same process. 6
Factory types
General parts
Process characteristics
Push parts
--General parts
Beauty of workpieces
Mutuality
-General parts
Effective hardened layer depth
JB/T9200-1999
Gregg hardness filtering range
Surface texture
Vickers hardness independent range
On-surface measurement
Table 12 Shore hardness passive range
Surface spot
The fluctuation range of the effective hardened layer depth is not allowed to exceed the provisions of Table 13. Table 13 The fluctuation range of effective hardening layer depth is effective hardening after tt> 3.5 -5.0
pieces in the same row
pieces in the same batch
pieces in the same selection
deep medical fluctuation
7.4 Unique hardening zone specification
JB/T9200-[999
hardening zone specification diagram or relevant technical documents specified in the table, must be listed in the specification reasonable deviation, the surface of the tough piece, its non-hard edge and the non-hard end of the work is not more than the brown: large T pieces are allowed to leave soft, its width is not more than 10mm, the staggered interval should not be more than 100mm. 7.5 Metallographic structure
metallographic structure of the tough part! According to the material and performance requirements of the workpiece, it should be a normal flow-type fiber or a flow-type fiber. 7.6 Deformation
The deformation of the workpiece at the bottom of the grinding process does not affect the quality of the subsequent machining and the performance. The deformation of the workpiece is determined by negotiation between the relevant parties.
8 Quality inspection method
Sampling of the workpiece after treatment. When sampling is not difficult, simulated samples can be used as much as possible. 8.2 Defect inspection
The inspection of cracks and flaws is carried out by magnifying the continuous eye, or by using JBT4009 near-line ultra-high-frequency flaw detection. 8.3 Hardness inspection
The hardness is in accordance with the provisions of GB/T230, GB/T4340, GB/T4341. For large parts, it can be inspected by ultra-high-pressure or portable hardness testers.
8.4 After micro-hardening, the effective hardening layer depth shall comply with the provisions of GR/T5617. %5 Metallographic group inspection
The product skin, demagnetization, body level and other inspections shall comply with the provisions of YB/T5148, GB/T224, GB/13617. 8.6 Deformation measurement
The deformation can be measured by dial indicator, ruler, feeler gauge or other positioner, meter, 9 Product report
The product report shall include the following contents: 1. Customer age or medical number; 2. Material quality; 3. Quantity and weight of 1. Item; 4. Quality inspection results and conclusions; 5. Name or code of inspector; 6. Processing date: year and month.4 Flowing machine tool
According to the shape and size of the workpiece, a proper one-time blasting machine tool or a mobile blasting machine tool, or other blasting machine tools suitable for the position of the workpiece can be set, but they should have the precision specified in Table 4. Table 4 Precision of blasting machine
Inspection items
Spindle taper hole slight jump! !
Rotation.1 The moving 1 of the worktable:
Parallelism of the line connecting the tip to the plate
T The maximum change in the feed speed of the workpiece
1) Insert the inspection needle into the axis hole and measure at 30Dmm away from the axis surface. 2 Install a magnetic disk with a weight greater than 3km, and measure at the half-weight 150mm: 3) Measure the average value of 1 working stroke 310
4.5 Tempering equipment
0.3mm (supporting length s2000mm)
4.5.1 The temperature deviation of the effective heating zone of the tempering heating equipment shall comply with the provisions of Table 5. Table 5 Tempering heating equipment effective heating zone overflow deviation suspension
Allowable disk deviation
Applicable scope
Important parts
General parts
4.5.2 It should be equipped with an automatic recording device that can track the relationship between tempering temperature and time, and an indicator of the thermoelectric temperature measurement device. The total error of the temperature reading after correction shall comply with the provisions of Table 6.
Error indicator point cover
4.6 Equipment maintenance
JB9200--[999
Table 6 Total error of temperature indicator
Comply with the operating procedures and maintenance system, and keep relevant records to ensure the accuracy and performance of the equipment. 5 Treatment method
5.1 Determination of treatment method
After the first two parts are accepted, the appropriate treatment method should be selected according to the steel type, heat treatment, surface quality and performance requirements, treatment equipment used, and the conditions after treatment. 5.2 Inspection of injectors, flame nozzles, cooling water nozzles and other parts Inspection of injectors, flame nozzles, cooling water nozzles and flame nozzles without damage, deformation, etc. The flame hole of the flame nozzle is clear: the water hole is not blocked by dirt.
5.3T clamping
During the processing, the workpiece, flame nozzle and cooling water nozzle should maintain the correct relative position and should not be eccentric or tilted. 5.4 Formulation of annealing process specifications
5.4.1 After the treatment method is determined, the specific values of the various pre-process parameters specified in Table 7 must be determined. The annealing process specifications are shown in Table 7. The annealing process specifications include the annealing properties and the amount of flame core. The annealing method and the temperature of the cooling medium, the opening force and volume of each workpiece or each treatment period, the gas (fuel gas, single gas), the time between each front anneal, the heating time required for the workpiece, the interval between the start of the heat cycle and the start of the annealing, the time between the start of the annealing and the start of the annealing. The annealing process specifications include the use of neutral single annealing, which is composed of three components: annealing, inner annealing and outer annealing. The flame core is a small light-collecting policy. 5.4.3 According to the type, shape and size of the workpiece, select the appropriate ignition medium and its pressure and flow rate: see Table 8 for the temperature range of water, oil and ethylene water solution.
Water supply
Meng spot filter
5.5 Tempering process specification
92001990
Table 8 Water, alcohol and alcohol water solution before tempering
5.5.1 According to the material, hardness or drawing requirements of the T piece, determine the tempering temperature and tempering time: 5.5.2 The piece below the surface ignition layer should be tempered when it is collected, and the tempering time should not exceed 4 seconds. 6 Appendix T sequence
Polyene alcohol small Jisen
56.1 The residual stress generated when correcting the work partner after annealing and tempering should not affect the subsequent mechanical processing and use. If necessary, the workpiece should be treated in a manner not exceeding the tempering degree after correction. 5.6.1 When cleaning the workpiece after treatment, it should not be subject to corrosion and other harmful effects. 5.7 Records of treatment
Treatment methods, process parameters, and quality inspection results should all be recorded and signed by the author and kept for a certain period of time. Safety technical requirements
GB15735 and gas welding safety technical regulations must be avoided during operation. 6.2
The production site safety technical regulations should include the various contents specified in Table 9 Table 9 Production workplace safety technical procedures
Car gas service, fuel Placement and isolation of the gas device
Check oxygen and filter gas to reach the system of the installation. Gas sample during use. Pressure measurement
Safety measures for gas and gas warning. Ignition and shutdown procedures
1 Operation and failure measures
Explosion-proof measures for combustion equipment
Quality of workpiece after treatment
The quality of the workpiece after treatment shall meet the requirements of relevant technical standards or samples, and ensure that the error is within the allowable range. 7.1 Appearance
There should be no defects such as over-operation, flame erosion, and plastic marks. 7.2 Hardness
The range of surface hardness shall comply with the provisions of Table 10, Table 11, and Table 12. Note: IRC, HV, and HS in the table are all measured values, and there is no direct conversion system for them. The first refers to a batch of parts with the same dosage processed under the same process. 6
Factory types
General parts
Process characteristics
Push parts
--General parts
Beauty of workpieces
Mutuality
-General parts
Effective hardened layer depth
JB/T9200-1999
Gregg hardness filtering range
Surface texture
Vickers hardness independent range
On-surface measurement
Table 12 Shore hardness passive range
Surface spot
The fluctuation range of the effective hardened layer depth is not allowed to exceed the provisions of Table 13. Table 13 The fluctuation range of effective hardening layer depth is effective hardening after tt> 3.5 -5.0
pieces in the same row
pieces in the same batch
pieces in the same selection
deep medical fluctuation
7.4 Unique hardening zone specification
JB/T9200-[999
hardening zone specification diagram or relevant technical documents specified in the table, must be listed in the specification reasonable deviation, the surface of the tough piece, its non-hard edge and the non-hard end of the work is not more than the brown: large T pieces are allowed to leave soft, its width is not more than 10mm, the staggered interval should not be more than 100mm. 7.5 Metallographic structure
metallographic structure of the tough part! According to the material and performance requirements of the workpiece, it should be a normal flow-type fiber or a flow-type fiber. 7.6 Deformation
The deformation of the workpiece at the bottom of the grinding process does not affect the quality of the subsequent machining and the performance. The deformation of the workpiece is determined by negotiation between the relevant parties.
8 Quality inspection method
Sampling of the workpiece after treatment. When sampling is not difficult, simulated samples can be used as much as possible. 8.2 Defect inspection
The inspection of cracks and flaws is carried out by magnifying the continuous eye, or by using JBT4009 near-line ultra-high-frequency flaw detection. 8.3 Hardness inspection
The hardness is in accordance with the provisions of GB/T230, GB/T4340, GB/T4341. For large parts, it can be inspected by ultra-high-pressure or portable hardness testers.
8.4 After microhardening, the effective hardening layer depth shall comply with the provisions of GR/T5617. %5 Metallographic group inspection
The product skin, demagnetization, body level and other inspections shall comply with the provisions of YB/T5148, GB/T224, GB/13617. 8.6 Deformation measurement
The deformation can be measured by dial indicator, ruler, feeler gauge or other positioner, meter, 9 Product report
The product report shall include the following contents: 1. Customer age or medical number; 2. Material quality; 3. Quantity and weight of 1. Quality inspection results and conclusions; 4. Name or code of inspector; 5. Processing date: year and month.1 The temperature deviation of the effective heating zone of the tempering heating equipment shall comply with the provisions of Table 5. Table 5 The temperature deviation of the effective heating zone of the tempering heating equipment shall comply with the provisions of Table 5. Applicable scope Important parts General parts 4.5.2 The temperature indicator shall be equipped with an automatic recording device that can track the relationship between the tempering temperature and time. The total error of the temperature reading after correction shall comply with the provisions of Table 6. 4.6 Equipment maintenance JB9200--[999 Table 6 Total error of temperature indicator Comply with the operating procedures and maintenance system, and keep relevant records to ensure the accuracy and performance of the equipment. 5 Treatment method
5.1 Determination of treatment method
After the first two parts are accepted, the appropriate treatment method should be selected according to the steel type, heat treatment, surface quality and performance requirements, treatment equipment used, and other conditions after treatment. 5.2 Inspection of injectors, flame nozzles, cooling water nozzles and clamps Inspect the injectors, flame nozzles, cooling water nozzles and injectors without damage, deformation, etc. The flame holes of the flame nozzles and cooling water nozzles should be clear: the water holes should not be blocked by dirt.
5.3 Clamping
During the treatment process, the workpiece and the flame nozzle and cooling water nozzle should maintain the correct relative position, and there should be no eccentricity and tilt. 5.4 Formulation of annealing process specifications
5.4.1 After the treatment method is determined, the specific values of the various pre-process parameters specified in Table 7 must be determined. The annealing process specifications are shown in Table 7. The annealing process specifications include the annealing properties and the amount of flame core. The annealing method and the temperature of the cooling medium, the opening force and volume of each workpiece or each treatment period, the gas (fuel gas, single gas), the time between each front anneal, the heating time required for the workpiece, the interval between the start of the heat cycle and the start of the annealing, the time between the start of the annealing and the start of the annealing. The annealing process specifications include the use of neutral single annealing, which is composed of three components: annealing, inner annealing and outer annealing. The flame core is a small light-collecting policy. 5.4.3 According to the type, shape and size of the workpiece, select the appropriate ignition medium and its pressure and flow rate: see Table 8 for the temperature range of water, oil and ethylene water solution.
Water supply
Meng spot filter
5.5 Tempering process specification
92001990
Table 8 Water, alcohol and alcohol water solution before tempering
5.5.1 According to the material, hardness or drawing requirements of the T piece, determine the tempering temperature and tempering time: 5.5.2 The piece below the surface ignition layer should be tempered when it is collected, and the tempering time should not exceed 4 seconds. 6 Appendix T sequence
Polyene alcohol small Jisen
56.1 The residual stress generated when correcting the work partner after annealing and tempering should not affect the subsequent mechanical processing and use. If necessary, the workpiece should be treated in a manner not exceeding the tempering degree after correction. 5.6.1 When cleaning the workpiece after treatment, it should not be subject to corrosion and other harmful effects. 5.7 Records of treatment
Treatment methods, process parameters, and quality inspection results should all be recorded and signed by the author and kept for a certain period of time. Safety technical requirements
GB15735 and gas welding safety technical regulations must be avoided during operation. 6.2
The production site safety technical regulations should include the various contents specified in Table 9 Table 9 Production workplace safety technical procedures
Car gas service, fuel Placement and isolation of the gas device
Check oxygen and filter gas to reach the system of the installation. Gas sample during use. Pressure measurement
Safety measures for gas and gas warning. Ignition and shutdown procedures
1 Operation and failure measures
Explosion-proof measures for combustion equipment
Quality of workpiece after treatment
The quality of the workpiece after treatment shall meet the requirements of relevant technical standards or samples, and ensure that the error is within the allowable range. 7.1 Appearance
There should be no defects such as over-operation, flame erosion, and plastic marks. 7.2 Hardness
The range of surface hardness shall comply with the provisions of Table 10, Table 11, and Table 12. Note: IRC, HV, and HS in the table are all measured values, and there is no direct conversion system for them. The first refers to a batch of parts with the same dosage processed under the same process. 6
Factory types
General parts
Process characteristics
Push parts
--General parts
Beauty of workpieces
Mutuality
-General parts
Effective hardened layer depth
JB/T9200-1999
Gregg hardness filtering range
Surface texture
Vickers hardness independent range
On-surface measurement
Table 12 Shore hardness passive range
Surface spot
The fluctuation range of the effective hardened layer depth is not allowed to exceed the provisions of Table 13. Table 13 The fluctuation range of effective hardening layer depth is effective hardening after tt> 3.5 -5.0
pieces in the same row
pieces in the same batch
pieces in the same selection
deep medical fluctuation
7.4 Unique hardening zone specification
JB/T9200-[999
hardening zone specification diagram or relevant technical documents specified in the table, must be listed in the specification reasonable deviation, the surface of the tough piece, its non-hard edge and the non-hard end of the work is not more than the brown: large T pieces are allowed to leave soft, its width is not more than 10mm, the staggered interval should not be more than 100mm. 7.5 Metallographic structure
metallographic structure of the tough part! According to the material and performance requirements of the workpiece, it should be a normal flow-type fiber or a flow-type fiber. 7.6 Deformation
The deformation of the workpiece at the bottom of the grinding process does not affect the quality of the subsequent machining and the performance. The deformation of the workpiece is determined by negotiation between the relevant parties.
8 Quality inspection method
Sampling of the workpiece after treatment. When sampling is not difficult, simulated samples can be used as much as possible. 8.2 Defect inspection
The inspection of cracks and flaws is carried out by magnifying the continuous eye, or by using JBT4009 near-line ultra-high-frequency flaw detection. 8.3 Hardness inspection
The hardness is in accordance with the provisions of GB/T230, GB/T4340, GB/T4341. For large parts, it can be inspected by ultra-high-pressure or portable hardness testers.
8.4 After micro-hardening, the effective hardening layer depth shall comply with the provisions of GR/T5617. %5 Metallographic group inspection
The product skin, demagnetization, body level and other inspections shall comply with the provisions of YB/T5148, GB/T224, GB/13617. 8.6 Deformation measurement
The deformation can be measured by dial indicator, ruler, feeler gauge or other positioner, meter, 9 Product report
The product report shall include the following contents: 1. Customer age or medical number; 2. Material quality; 3. Quantity and weight of 1. Item; 4. Quality inspection results and conclusions; 5. Name or code of inspector; 6. Processing date: year and month.1 The temperature deviation of the effective heating zone of the tempering heating equipment shall comply with the provisions of Table 5. Table 5 The temperature deviation of the effective heating zone of the tempering heating equipment shall comply with the provisions of Table 5. Applicable scope Important parts General parts 4.5.2 The temperature indicator shall be equipped with an automatic recording device that can track the relationship between the tempering temperature and time. The total error of the temperature reading after correction shall comply with the provisions of Table 6. 4.6 Equipment maintenance JB9200--[999 Table 6 Total error of temperature indicator Comply with the operating procedures and maintenance system, and keep relevant records to ensure the accuracy and performance of the equipment. 5 Treatment method
5.1 Determination of treatment method
After the first two parts are accepted, the appropriate treatment method should be selected according to the steel type, heat treatment, surface quality and performance requirements, treatment equipment used, and other conditions after treatment. 5.2 Inspection of injectors, flame nozzles, cooling water nozzles and clamps Inspect the injectors, flame nozzles, cooling water nozzles and injectors without damage, deformation, etc. The flame holes of the flame nozzles and cooling water nozzles should be clear: the water holes should not be blocked by dirt.
5.3 Clamping
During the treatment process, the workpiece and the flame nozzle and cooling water nozzle should maintain the correct relative position, and there should be no eccentricity and tilt. 5.4 Formulation of annealing process specifications
5.4.1 After the treatment method is determined, the specific values of the various pre-process parameters specified in Table 7 must be determined. The annealing process specifications are shown in Table 7. The annealing process specifications include the annealing properties and the amount of flame core. The annealing method and the temperature of the cooling medium, the opening force and volume of each workpiece or each treatment period, the gas (fuel gas, single gas), the time between each front anneal, the heating time required for the workpiece, the interval between the start of the heat cycle and the start of the annealing, the time between the start of the annealing and the start of the annealing. The annealing process specifications include the use of neutral single annealing, which is composed of three components: annealing, inner annealing and outer annealing. The flame core is a small light-collecting policy. 5.4.3 According to the type, shape and size of the workpiece, select the appropriate ignition medium and its pressure and flow rate: see Table 8 for the temperature range of water, oil and ethylene water solution.
Water supply
Meng spot filter
5.5 Tempering process specification
92001990
Table 8 Water, alcohol and alcohol water solution before tempering
5.5.1 According to the material, hardness or drawing requirements of the T piece, determine the tempering temperature and tempering time: 5.5.2 The piece below the surface ignition layer should be tempered when it is collected, and the tempering time should not exceed 4 seconds. 6 Appendix T sequence
Polyene alcohol small Jisen
56.1 The residual stress generated when correcting the work partner after annealing and tempering should not affect the subsequent mechanical processing and use. If necessary, the workpiece should be treated in a manner not exceeding the tempering degree after correction. 5.6.1 When cleaning the workpiece after treatment, it should not be subject to corrosion and other harmful effects. 5.7 Records of treatment
Treatment methods, process parameters, and quality inspection results should all be recorded and signed by the author and kept for a certain period of time. Safety technical requirements
GB15735 and gas welding safety technical regulations must be avoided during operation. 6.2
The production site safety technical regulations should include the various contents specified in Table 9 Table 9 Production workplace safety technical procedures
Car gas service, fuel Placement and isolation of the gas device
Check oxygen and filter gas to reach the system of the installation. Gas sample during use. Pressure measurement
Safety measures for gas and gas warning. Ignition and shutdown procedures
1 Operation and failure measures
Explosion-proof measures for combustion equipment
Quality of workpiece after treatment
The quality of the workpiece after treatment shall meet the requirements of relevant technical standards or samples, and ensure that the error is within the allowable range. 7.1 Appearance
There should be no defects such as over-operation, flame erosion, and plastic marks. 7.2 Hardness
The range of surface hardness shall comply with the provisions of Table 10, Table 11, and Table 12. Note: IRC, HV, and HS in the table are all measured values, and there is no direct conversion system for them. The first refers to a batch of parts with the same dosage processed under the same process. 6
Factory types
General parts
Process characteristics
Push parts
--General parts
Beauty of workpieces
Mutuality
-General parts
Effective hardened layer depth
JB/T9200-1999
Gregg hardness filtering range
Surface texture
Vickers hardness independent range
On-surface measurement
Table 12 Shore hardness passive range
Surface spot
The fluctuation range of the effective hardened layer depth is not allowed to exceed the provisions of Table 13. Table 13 The fluctuation range of effective hardening layer depth is effective hardening after tt> 3.5 -5.0
pieces in the same row
pieces in the same batch
pieces in the same selection
deep medical fluctuation
7.4 Unique hardening zone specification
JB/T9200-[999
hardening zone specification diagram or relevant technical documents specified in the table, must be listed in the specification reasonable deviation, the surface of the tough piece, its non-hard edge and the non-hard end of the work is not more than the brown: large T pieces are allowed to leave soft, its width is not more than 10mm, the staggered interval should not be more than 100mm. 7.5 Metallographic structure
metallographic structure of the tough part! According to the material and performance requirements of the workpiece, it should be a normal flow-type fiber or a flow-type fiber. 7.6 Deformation
The deformation of the workpiece at the bottom of the grinding process does not affect the quality of the subsequent machining and the performance. The deformation of the workpiece is determined by negotiation between the relevant parties.
8 Quality inspection method
Sampling of the workpiece after treatment. When sampling is not difficult, simulated samples can be used as much as possible. 8.2 Defect inspection
The inspection of cracks and flaws is carried out by magnifying the continuous eye, or by using JBT4009 near-line ultra-high-frequency flaw detection. 8.3 Hardness inspection
The hardness is in accordance with the provisions of GB/T230, GB/T4340, GB/T4341. For large parts, it can be inspected by ultra-high-pressure or portable hardness testers.
8.4 After micro-hardening, the effective hardening layer depth shall comply with the provisions of GR/T5617. %5 Metallographic group inspection
The product skin, demagnetization, body level and other inspections shall comply with the provisions of YB/T5148, GB/T224, GB/13617. 8.6 Deformation measurement
The deformation can be measured by dial indicator, ruler, feeler gauge or other positioner, meter, 9 Product report
The product report shall include the following contents: 1. Customer age or medical number; 2. Material quality; 3. Quantity and weight of 1. Item; 4. Quality inspection results and conclusions; 5. Name or code of inspector; 6. Processing date: year and month.1 After the treatment method is determined, the specific values of the various pre-process parameters specified in Table 7 must be determined. The table shows the annealing process specifications, the flame enhancement properties and the flame core content. The temperature of the cooling medium, the opening force and volume of each workpiece or each treatment period, the time required for heating the workpiece, the interval between the start of the heat cycle and the start of the annealing, the time between the start of the annealing and the start of the annealing. The flame core is a small light collecting device located at the nozzle 21. | |tt||5.4. The specifications of the melting and quenching process and the flame spray and cooling water are determined. The first is to be verified. 5.4.3 According to the type, shape and size of the workpiece, select the appropriate quenching medium and its pressure and flow rate: the temperature range of water, oil and ethylene water solution is shown in Table 8.
Water supply
Meng spot filter
5.5 Tempering process specification
92001990
Table 8 Tempering temperature range of water, alcohol and alcohol water solution
5.5.1 According to the material, hardness or drawing requirements of the workpiece, determine the tempering temperature and tempering time: 5.5.2 The workpiece under the surface quenching layer should be tempered immediately, and the tempering time should not exceed 4 seconds. 6 Appendix T sequence
Polyene alcohol small Jisen
56.1 The residual stress generated when correcting the work partner after annealing and tempering should not affect the subsequent mechanical processing and use. If necessary, the workpiece should be treated in a manner not exceeding the tempering degree after correction. 5.6.1 When cleaning the workpiece after treatment, it should not be subject to corrosion and other harmful effects. 5.7 Records of treatment
Treatment methods, process parameters, and quality inspection results should all be recorded and signed by the author and kept for a certain period of time. Safety technical requirements
GB15735 and gas welding safety technical regulations must be avoided during operation. 6.2
The production site safety technical regulations should include the various contents specified in Table 9 Table 9 Production workplace safety technical procedures
Car gas service, fuel Placement and isolation of the gas device
Check oxygen and filter gas to reach the system of the installation. Gas sample during use. Pressure measurement
Safety measures for gas and gas warning. Ignition and shutdown procedures
1 Operation and failure measures
Explosion-proof measures for combustion equipment
Quality of workpiece after treatment
The quality of the workpiece after treatment shall meet the requirements of relevant technical standards or samples, and ensure that the error is within the allowable range. 7.1 Appearance
There should be no defects such as over-operation, flame erosion, and plastic marks. 7.2 Hardness
The range of surface hardness shall comply with the provisions of Table 10, Table 11, and Table 12. Note: IRC, HV, and HS in the table are all measured values, and there is no direct conversion system for them. The first refers to a batch of parts with the same dosage processed under the same process. 6
Factory types
General parts
Process characteristics
Push parts
--General parts
Beauty of workpieces
Mutuality
-General parts
Effective hardened layer depth
JB/T9200-1999
Gregg hardness filtering range
Surface texture
Vickers hardness independent range
On-surface measurement
Table 12 Shore hardness passive range
Surface spot
The fluctuation range of the effective hardened layer depth is not allowed to exceed the provisions of Table 13. Table 13 The fluctuation range of effective hardening layer depth is effective hardening after tt> 3.5 -5.0
pieces in the same row
pieces in the same batch
pieces in the same selection
deep medical fluctuation
7.4 Unique hardening zone specification
JB/T9200-[999
hardening zone specification diagram or relevant technical documents specified in the table, must be listed in the specification reasonable deviation, the surface of the tough piece, its non-hard edge and the non-hard end of the work is not more than the brown: large T pieces are allowed to leave soft, its width is not more than 10mm, the staggered interval should not be more than 100mm. 7.5 Metallographic structure
metallographic structure of the tough part! According to the material and performance requirements of the workpiece, it should be a normal flow-type fiber or a flow-type fiber. 7.6 Deformation
The deformation of the workpiece at the bottom of the grinding process does not affect the quality of the subsequent machining and the performance. The deformation of the workpiece is determined by negotiation between the relevant parties.
8 Quality inspection method
Sampling of the workpiece after treatment. When sampling is not difficult, simulated samples can be used as much as possible. 8.2 Defect inspection
The inspection of cracks and flaws is carried out by magnifying the continuous eye, or by using JBT4009 near-line ultra-high-frequency flaw detection. 8.3 Hardness inspection
The hardness is in accordance with the provisions of GB/T230, GB/T4340, GB/T4341. For large parts, it can be inspected by ultra-high-pressure or portable hardness testers.wwW.bzxz.Net
8.4 After micro-hardening, the effective hardening layer depth shall comply with the provisions of GR/T5617. %5 Metallographic group inspection
The product skin, demagnetization, body level and other inspections shall comply with the provisions of YB/T5148, GB/T224, GB/13617. 8.6 Deformation measurement
The deformation can be measured by dial indicator, ruler, feeler gauge or other positioner, meter, 9 Product report
The product report shall include the following contents: 1. Customer age or medical number; 2. Material quality; 3. Quantity and weight of 1. Item; 4. Quality inspection results and conclusions; 5. Name or code of inspector; 6. Processing date: year and month.1 After the treatment method is determined, the specific values of the various pre-process parameters specified in Table 7 must be determined. The table shows the annealing process specifications, the flame enhancement properties and the flame core content. The temperature of the cooling medium, the opening force and volume of each workpiece or each treatment period, the time required for heating the workpiece, the interval between the start of the heat cycle and the start of the annealing, the time between the start of the annealing and the start of the annealing. The flame core is a small light collecting device located at the nozzle 21. | |tt||5.4. The specifications of the melting and quenching process and the flame spray and cooling water are determined. The first is to be verified. 5.4.3 According to the type, shape and size of the workpiece, select the appropriate quenching medium and its pressure and flow rate: the temperature range of water, oil and ethylene water solution is shown in Table 8.
Water supply
Meng spot filter
5.5 Tempering process specification
92001990
Table 8 Tempering temperature range of water, alcohol and alcohol water solution
5.5.1 According to the material, hardness or drawing requirements of the workpiece, determine the tempering temperature and tempering time: 5.5.2 The workpiece under the surface quenching layer should be tempered immediately, and the tempering time should not exceed 4 seconds. 6 Appendix T sequence
Polyene alcohol small Jisen
56.1 The residual stress generated when correcting the work partner after annealing and tempering should not affect the subsequent mechanical processing and use. If necessary, the workpiece should be treated in a manner not exceeding the tempering degree after correction. 5.6.1 When cleaning the workpiece after treatment, it should not be subject to corrosion and other harmful effects. 5.7 Records of treatment
Treatment methods, process parameters, and quality inspection results should all be recorded and signed by the author and kept for a certain period of time. Safety technical requirements
GB15735 and gas welding safety technical regulations must be avoided during operation. 6.2
The production site safety technical regulations should include the various contents specified in Table 9 Table 9 Production workplace safety technical procedures
Car gas service, fuel Placement and isolation of the gas device
Check oxygen and filter gas to reach the system of the installation. Gas sample during use. Pressure measurement
Safety measures for gas and gas warning. Ignition and shutdown procedures
1 Operation and failure measures
Explosion-proof measures for combustion equipment
Quality of workpiece after treatment
The quality of the workpiece after treatment shall meet the requirements of relevant technical standards or samples, and ensure that the error is within the allowable range. 7.1 Appearance
There should be no defects such as over-operation, flame erosion, and plastic marks. 7.2 Hardness
The range of surface hardness shall comply with the provisions of Table 10, Table 11, and Table 12. Note: IRC, HV, and HS in the table are all measured values, and there is no direct conversion system for them. The first refers to a batch of parts with the same dosage processed under the same process. 6
Factory types
General parts
Process characteristics
Push parts
--General parts
Beauty of workpieces
Mutuality
-General parts
Effective hardened layer depth
JB/T9200-1999
Gregg hardness filtering range
Surface texture
Vickers hardness independent range
On-surface measurement
Table 12 Shore hardness passive range
Surface spot
The fluctuation range of the effective hardened layer depth is not allowed to exceed the provisions of Table 13. Table 13 The fluctuation range of effective hardening layer depth is effective hardening after tt> 3.5 -5.0
pieces in the same row
pieces in the same batch
pieces in the same selection
deep medical fluctuation
7.4 Unique hardening zone specification
JB/T9200-[999
hardening zone specification diagram or relevant technical documents specified in the table, must be listed in the specification reasonable deviation, the surface of the tough piece, its non-hard edge and the non-hard end of the work is not more than the brown: large T pieces are allowed to leave soft, its width is not more than 10mm, the staggered interval should not be more than 100mm. 7.5 Metallographic structure
metallographic structure of the tough part! According to the material and performance requirements of the workpiece, it should be a normal flow-type fiber or a flow-type fiber. 7.6 Deformation
The deformation of the workpiece at the bottom of the grinding process does not affect the quality of the subsequent machining and the performance. The deformation of the workpiece is determined by negotiation between the relevant parties.
8 Quality inspection method
Sampling of the workpiece after treatment. When sampling is not difficult, simulated samples can be used as much as possible. 8.2 Defect inspection
The inspection of cracks and flaws is carried out by magnifying the continuous eye, or by using JBT4009 near-line ultra-high-frequency flaw detection. 8.3 Hardness inspection
The hardness is in accordance with the provisions of GB/T230, GB/T4340, GB/T4341. For large parts, it can be inspected by ultra-high-pressure or portable hardness testers.
8.4 After micro-hardening, the effective hardening layer depth shall comply with the provisions of GR/T5617. %5 Metallographic group inspection
The product skin, demagnetization, body level and other inspections shall comply with the provisions of YB/T5148, GB/T224, GB/13617. 8.6 Deformation measurement
The deformation can be measured by dial indicator, ruler, feeler gauge or other positioner, meter, 9 Product report
The product report shall include the following contents: 1. Customer age or medical number; 2. Material quality; 3. Quantity and weight of 1. Item; 4. Quality inspection results and conclusions; 5. Name or code of inspector; 6. Processing date: year and month.2 Table Hardness
The range of surface hardness shall comply with the provisions of Table 10, Table 11, Table 12. Note: IRC, HV, HS in the table are all measured values, and there is no direct conversion system. The first refers to a batch of parts with the same treatment process under the same process. 6
Factory types
General parts
Process characteristics
Push parts
--General parts
Beauty of workpieces
Mutuality
-General parts
Effective hardened layer depth
JB/T9200-1999
Gregg hardness filtering range
Surface texture
Vickers hardness independent range
On-surface measurement
Table 12 Shore hardness passive range
Surface spot
The fluctuation range of the effective hardened layer depth is not allowed to exceed the provisions of Table 13. Table 13 The fluctuation range of effective hardening layer depth is effective hardening after tt> 3.5 -5.0
pieces in the same row
pieces in the same batch
pieces in the same selection
deep medical fluctuation
7.4 Unique hardening zone specification
JB/T9200-[999
hardening zone specification diagram or relevant technical documents specified in the table, must be listed in the specification reasonable deviation, the surface of the tough piece, its non-hard edge and the non-hard end of the work is not more than the brown: large T pieces are allowed to leave soft, its width is not more than 10mm, the staggered interval shou
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