JB/T 9201-1999 Induction hardening and tempering treatment of steel parts
Some standard content:
ICS25.200
Machinery Industry Standard of the People's Republic of China
JB/T9201-1999
Inductian hardening and tempering of iron and steel parts1999-06-24·Issued
National Bureau of Machinery Industry
2000-01-01Implementation
FB/T9202-t999
This standard is a revision of ZBJ36005-886 "Induction Hardening and Tempering of Iron and Steel Parts". During the revision, the relevant provisions were edited, and the main technical content remained unchanged. This standard replaces ZBJ36005-88 from the date of implementation. This standard is proposed and managed by the Technical Committee for Heat Treatment Standardization. The responsible drafting unit of this standard: First Automobile Group Corporation. The drafters of this standard are Shu, Bo, Wang, Xuan. This standard was first issued on May 23, 1988. 1 Scope
Machinery Industry Standard of the People's Republic of China
Induction hardening and tempering of iron and steel parts
Induetion hardening and tempering of iron and steel partsJB/T9201-1999
13605--- 88
This standard specifies the basic requirements for quality control and protection of induction hardening and tempering of iron and steel parts. It is used for heat treatment of steel by induction hardening (current frequency 5--500) and tempering in furnace or whitening. 2 Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, all the standards shown are valid. All standards will be revised. Parties using this standard should explore the possibility of using the latest versions of the following standards: GBJ 87—1985
GB/ 230.1991
GB/T 4340.-1984
GB/T4341—1984
GR/ 5617—1985
GB/T 9452—1988
GD/T 13298--199I
GB/T 16924--1997
JB/T3999—1999
JB/T 4120—E993
JB/14204—19595
JB/T92051999
JB/T 92181999
3 Workpiece
T. Design specification for noise control of industrial enterprises
Enterprise bath vitreous test method
Jinmei Vickers hardness test method
Jinxiao hardness test method
Determination of effective hardened layer depth after induction quenching or quenching of steel Determination of effective heating zone of heat treatment furnace Storage method
Method for microstructure inspection of metal
Quenching and tempering of steel parts
Carbon and carbon ammonium co-penetration and tempering of steel parts
Large forging steel support
Steel combustion metallographic detector
Light body ductile tooth Iron parts should be subjected to induction fire test rod penetration method
3.1 Induction fire processability of parts
The material and technical requirements of the workpiece (hardness, hardened layer thickness, hardened zone range, metallographic structure before and after treatment, shape matrix, etc.) and the geometric shape of the treated part (shape, true diameter change, mesh angle size, wall thickness, hole, key extraction, etc.) should all be suitable for the induction fire process characteristics.
3.2 Workpiece material
Induction fire workpieces should use the various grades shown in the table to be materials with corresponding chemical composition, approved by the State Machinery Industry Bureau on June 24, 1999, and January 1, 2001 Real
Dai Leque Lai Pei Fast Smoke
Low-cost parts containing high-quality limited inspection structure
Alloy pin structure
Single energy system
Bearing steel
Magnetic case 7 tool system
Metal T tool steel
Cold-cold containing gold steel cold Ni.1 Working steel
Cold-cold alloy calcium bearing machine idle
Stainless steel paint
Xie Re Gang Bang
"-stock process with carbon deficiency
Steamed iron
Re-light body adjustable iron deficiency
Ring-shaped iron
Powder lubricant carbon-based structural materials
JB/T9201—1999
Table 1 Materials of induction itch fire tempering workpieces
25. 30, 35, 4.45, 50.35, 60 | | tt | n,35SiM,42SiMr40H,45B,50B,40MnB,45MnD,40MnVB30Cr,35Cr,40Cr,45Cr.50Cr,38CrSi.30CrMo,35CrMo,42CrMo.40rv40CrMn, 25CrMnSi, 30CtMn51. 35CrMnSiA, 40CrMnMo, 4x.rNi, 45CrNi,5UCrNI, 40CTNiMDA
65.7,85.65Mn,70Mn,55Si2MIn.55SiMnB,55SiMnVH.hiksi2Mn.USi2MnA,60Si2CrA,60Si2CrVA.55CrMnA,50CcMnA.6 0C.MnMuA.50CTVA, 60CMBA
GCr6.oCr9.GCr9SIMn, GCr15.GCrl5SiMuT7,S, T8Mo, T9, T10. T1I. T12. T139Mr2Y,CrWMn.9CrWMn,5CYMaMo.5CrNiMoSCrMV,8Cr2MoV,9Cr29CT2Mo,9Cr2W,9Cr3Ma,4CzMuVCt2.5C2Mo,9CrV,75CrMo.70Cr3Mo,35CrMa,42C1Mfu,55Cr2Cr13,313,3Cr13Mo
4Cr9Si 2. 4Cr105i2Mo.8Cr20S2NiZKT8. ZKCr, ZK35SitnMo. ZK35SiVnMoVZG230430. 2O270-500.ZO310-570,ZG316-6HT200.HT250,JTT300,1IT350
KJZ45006.KTZ55004.KTZ650-(2.KTZ70002FJ4(K18, QT40015, QT450~10, QT5007, QT6003, QT7IK 2, Q1800-2,T9002
F1G30.FTG60,FTG90,FTG70Cu3,FTG60CwMn1The grades or chemical compositions shown in the examples and various alloy steels can be selected. z When carburized steel (brand name Luzhao B Hall 3999) is subjected to quenching and tempering after decompression, the relevant contents of this standard shall also apply. 3.3T parts of the original width of the material
which should include the items specified in Table 2,
(1) technical brand, number and test data
iron brand
good number
chemical composition:
test data!
energy test teaching, etc.!
floating cost test number
metallographic inspection number
[2] supply efficiency
powder wood enterprise
(pre-process
cold process
reverse assembly
Shenzhen method
[4' pre-heat treatment
normalizing fire
research full fire avoidance
spheroidizing fire bzxZ.net
to beat the retreat
||JB/T9201—1999
Table 2 Original data of workpiece
Grain number, delamination depth, carbon content, non-metallic structure, effective organization and low power grade
Specification
Cold or hot
Cold or hot
Good condition
If necessary, please indicate the option
And indicate the hardness
And indicate the hardness
And indicate the hardness
And the hard skin
And the calculation method
And the degree of change
【】These items can be partially or completely omitted for general purposes 3
JBT9201-1999
3.4 Appearance, size and surface condition of the workpiece before treatment The content should include the items specified in Table 3:
Table 3 Appearance, size and surface condition of the workpiece before treatment Items
(1) Appearance
（2）Dimensions and precision area! ）
Processing of the parts
Overall workload
Dimensional specifications
Shape tolerance
Position tolerance
【3】Surface twist of the treated parts
（4）Slip treatment method1)
（5）Type of rust inhibitor13
11For general parts, some or all of these items should be omitted. Induction heating equipment
4.1 Induction heating power supply
There should be no cracks, fast marks, rust, black, burrs and other problems. The main features are straightness, flatness, mesh, four-hang degree, line wheel degree and surface wheel degree
Main index parallelism, verticality, inclination, position accuracy, axiality and symmetry
Items
Induction heating power supply, whether it is a motor type, a thyristor type, a tube type or a transistor type, its output power and frequency must meet the operating requirements, and the input voltage should be controlled within the range of ±2.5% or the output power within the range of +5%. 4.2 Induction heat treatment machine
The accuracy of the machine tool should comply with the provisions of Table 4.
Table 4 Accuracy of induction heating machine tools
Inspection items
Spindle bore slight internal runout! 3
Parallelism of the moving
goods tip blue line of the rotating table
T. The change of the speed of the parts is 11
1) Put the test piece into the main shaft hole, and measure at 300)mm from the main shaft end, 2) Install a disc with a diameter greater than 300mm, and measure at 150mm of the diameter, 3) Measure the average speed of the working stroke of 300mm. 4.3 Time device
0.3mm (to length s2000mm)
Induction such as thermoelectric or fire-breaking machine tools are equipped with time control devices for heating, delay, and cooling time as needed (including timers. IB/T 9201-1999
time devices, intermediate relays and other devices). Its comprehensive accuracy should meet the requirements of Table 3. Table 5 Comprehensive accuracy of the device
4.4 Heat cooling equipment
Combined precision
The heat control system should have sufficient capacity and be equipped with appropriate heat medium circulation device, temperature adjustment device, and a stirring device with a certain flow rate or a device with mesh effect. 4.5 Tempering equipment
4.5.1 The effective heating zone of the tempering heating equipment should comply with the provisions of 0B/9452, and its temperature deviation is shown in Table 6. Table 6 Temperature difference of the effective heating zone of the tempering heating equipment Heating zone group
Allowable temperature deviation
Quantity requirements
4.5.2 An automatic recording device that can track the relationship between tempering temperature and time should be equipped, and the indicator of the thermoelectric temperature measuring device should meet the requirements of the table after correction. 4.5.3 The heat shall not cause corrosion or other harmful effects on the parts. 4.6 Equipment maintenance ±r: 100 The operation procedures and maintenance system shall be followed to keep records and ensure the performance of the equipment. 4.7 Labor protection requirements 4.7.1 The occupational exposure limit of high-frequency radiation shall comply with the current high-frequency radiation health standards. 4.7.2 The noise limit shall be in accordance with GEJ7 and shall not exceed 90 B. 5 Treatment methods 5. 1. Acceptance of work performance before treatment
The following items shall be inspected according to the items specified in 3.3 and 3.4. 5.2 Determination of treatment method
Based on the material, shape, size, technical requirements and equipment case of the workpiece, determine the heating method (one-time or continuous), cooling method (spray filtration or liquid installation) and heating method (inlet heating or external heating) 5.3 Design, manufacture and use of process equipment! The structure, shape and dimensional accuracy of the sensor shall meet the use requirements. 5.1.2 There must be good contact between the sensor and the end plate of the transformer. 5.4 Clamping of parts
The sensor and the workpiece shall maintain a suitable relative position during the treatment process. Formulation of SS process specifications
Based on the parts, equipment conditions and test Based on the test results, determine the heating process cost [such as power or circuit output, heating time or component input speed, voltage, transformer turns ratio or inductor number, capacitor, anode current and grid current ratio, etc.] According to the material, shape, size and connection requirements of the component, select the appropriate annealing medium (gas, water, oil, emulsified aqueous solution, etc.), and determine the cooling process parameters (such as medium temperature, pressure, flow rate, concentration range and cooling time) by test. 5.6 Tempering medium
5.6.1 The applicable temperature range of water, oil and water-soluble annealing medium is shown in Table 8. The commonly used temperature ranges of water, oil and water-soluble annealing medium are shown in Table 8. 5.6.2 The annealing medium composition shall meet the relevant standards and shall be checked regularly. 5. Formulation of annealing process specifications
Water-soluble annealing medium
10- 4n1
The workpiece should generally be tempered in time after annealing, and the heating rate, temperature, time and cooling method should be appropriate. For workpieces with simple shapes and low alloy element content, self-annealing can be used, and hardness test is generally used to verify the tempering effect. 5.8 Time sequence
5. Information! The residual stress generated when the workpiece is corrected after annealing and tempering should not affect the subsequent mechanical processing and other performance: the important time. The larger piece should be subjected to stress relief treatment at a temperature not higher than the annealing temperature. 5.2 After annealing, the workpiece should not be exposed to corrosion and other harmful effects when it is cleaned. 5.9 Record of treatment
The treatment method, process parameters, quality and inspection results should be recorded and signed by relevant personnel, and guaranteed for a certain period of time. 6 Quality of workpieces after treatment
6.1 Quality inspection
The inspector should control the surrounding samples, 1. The inspection methods specified in the process documents, standards and inspection specifications, take the type and number of samples, b.3 Surface hardness
6.3.1 Surface hardness fluctuation range of the surface hardness of the firework, according to the requirements, it shall comply with the provisions of Table 9, Table 10, Table 1Ⅱ1: The provisions of Table 11 are only applicable to some large workpieces,
JB/T9201-1999
A hardness measurement is the actual measured value of the corresponding hardness tester. It shall not be repeated for the same batch of workpieces with the same size, material and process. When the same workpiece is subjected to different requirements, the requirements shall be the same as before.
3 The measurement position shall be carried out according to the specified limit. The slowing down area shall not be selected as the measurement position. Table 9
Gregg hardness fluctuation range
Hardness
1.Type of workpiece
Type of workpiece
General workpiece
! Type of workpiece
Type of workpiece
General workpiece
Vickers hardness fluctuation range
Table hardness width
True hardness reduction range
Surface hardness fluctuation range of workpieces with penetration rate Refer to B/16924. 6.3.2
6.4 Effective hardening layer depth
6.4.1 The effective hardening layer reduction range of simple shape workpieces shall comply with the provisions of Table [2, s 50
One push piece
The same pick piece
The same press piece
Effective hardening depth
> E.5-2.5
JB/T 92 No. 1—I999
Table 12 Fluctuation range of effective hardening layer depth of simple shape workpieces Fluctuation range of depth of hardening layer
One batch of parts
1 The same batch of parts refers to the size processed within 8 hours, and it applies to the same piece. When the hardening depth required in different parts of the same piece is different, the slight fluctuation of the hardening layer depth is required to be the same. 2 The hardening layer depth measurement position should be determined according to the inspection limit, and the hardened area should not be recorded as the measurement part. 3 Unless otherwise specified, the hardening depth on the surface is the effective hardening. 6.4.2 The effective physical and chemical layer depth of the deformed and human-shaped parts shall be allowed to have a larger passive range after consultation with the relevant parties. 6.5 Hardening zone range
The hardening zone range is the surface specified in the drawing or relevant documents. The hardening zone: The hardening zone range must specify the allowable deviation of the surface treatment. 6.6 Metallographic structure
The metallographic structure of the treated part shall be the positive structure required by the product. 6.7 The deformation of the workpiece after deformation
treatment shall not affect the subsequent machining quality and performance. The allowable deformation of the workpiece shall be agreed upon by the relevant parties. Quality inspection method for workpieces after treatment
7.1 Surface concave reflection inspection
Surface defect inspection can be based on According to the characteristics of the following parts, the following methods are adopted: Visual observation; Ultrasonic flaw detection (according to the corresponding standards); Penetrant flaw detection is carried out according to JB/T9218. 7.7 Hardness test; Hardness test is carried out according to the requirements and the following test methods are adopted: Rockwell hardness is carried out according to GBT23V; Base hardness is carried out according to GB/T4340; Back hardness is carried out according to GB/T4341. 3 Metallographic structure inspection; Metallographic structure inspection is carried out according to GB/T9298, JR/T9204, B/T9205; 4 Hardening depth measurement; Steel parts are carried out according to GB/T 5G17 stipulates:
JE/T 9201--1999
Special iron parts shall be in accordance with 1R/T9205. Product report form
The product report form shall include the following contents:
-Name of workpiece:
-Material of workpiece:
-Number and quantity of workpiece:
-Quality inspection results and conclusion:
Name of inspector or code
Operator's unit, name or code:
Processing date: year, month, day.
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