JB/T 9172-1999 Gear nitriding and nitrocarburizing process and quality control
Some standard content:
Machinery Industry Standard of the People's Republic of China
IB/T9172—1999
Gear nitriding and nitrocarburizing process and its quality control
Gcar nitriding and nitrocarburizing process and its quality control
1999-06-24 Issued
National Bureau of Machinery Industry
2000-01-01 Implementation
JB/T9172-1999
This standard is a revision of the B7-Gear Nitriding and Nitrocarburizing Process and its Quality Control. This standard is implemented from 2J001-88. The appendix of this standard is a reminder of the requirements. This standard is proposed by the National Gear Standardization Technical Committee and is responsible for the production and operation of the standard. Main drafters of the successful bid: Li Gaizhen, Chen Xiuyu, Yang Xingyuan, 1 Fan Li
Machinery Industry Standard of the People's Republic of China
Gear nitriding and mitral carburizing
Process and quality control
Geur nitriding and mitral carburizingProcess and lts quality controlJB/T9171—1999
Code:? 1-
This standard defines the relevant terms, material selection and processing equipment, technology and quality control of nitriding (gas, ion) and mitral carburizing (gas, ion, body) of gears:
This standard is applicable to the nitriding, nitriding and mitral carburizing of alloy structural steel and ductile iron gears and the hydrogen nitriding of 45 carbon structural steel: 2 Cited standards
The following provisions are incorporated herein by reference or are the provisions of this standard. At the time of publication of this mark, the indicated editions are valid. All standards are subject to approval. The parties who determine the standards should use the latest versions of the following standards as much as possible GB:T699J488
GBT :818-1994
GRT :348 198S
GE/ 3077--1938
GD.T 34301997
GB/T 43401984
GB/T 5030—1985
GB/T 945I—I988
GBT113541989
GH- [3299-199]
YHT.5143—1993
JG 74—1992
3 Terminology
Technical conditions for high-quality phosphorus structural steel
Test method for the hardness of metal surface
Spheroidal cast iron parts
Technical conditions for alloy structural steel
Calculation method for load-bearing capacity of special gears
Method for testing the hardness of metal
Small load iodine test force method
Determination of the total carbide layer or effective silicification depth of steel parts Determination of the depth of paint layer on steel parts and metallographic examination Method for evaluating the microstructure of steel
Method for determining the quality of alloy flat groove
Verification procedure for dynamic balancing indicator
The following terms are used in this standard.
3.1 Tooth surface hardness
The hardness of the teeth and the middle part of the gear wheel must be used at the working height. 3.2 Depth of pressure
After the gear or sample is nitrided and hydrogen-treated, the hardness of the gear or the effective structure at the vertical measurement from the surface of the hardened layer is determined! 3.3 Limit hardness value
Approved by the State Administration of Machinery Industry on June 24, 1999
Implementation on June 24, 20000
[B/T 9172—1999
Average accurate data, effective breaking and the lower hardness of the effective hardening layer are provided, the limit hardness value is 1 (actual standard avoid 50HV, 3.4 and the depth of the effective hardening layer
gear rate sensitivity, atmosphere embedded in the middle of the gear tooth standard section, on the tooth high and low new edge and then to the main limit hardness value of the deep love,
6! The same method is infiltrated, after rolling, on the straight horizontal surface of the effective surface, the white table is measured to the limit hardness compensation at the dense 4 gear material selection
4.1 Quality of the box
4.1.1 Chemical or chromatic atomization, 0 and high-power organization: non-contained foreign matter, shall comply with GB/T3077, GHT699: 4.1.2 The starting size of the product shall be drawn by lathe quality: Grade YB 514B: When the limit value of the fatigue side is set at the upper limit of the variable limit area diagram of GB/T480, the particle size level must be above Grade 1. 4.1.3 For internal gears with special requirements, the user shall negotiate with the manufacturer. 4.2 Quality and performance|| 2.1 Construction ratio: For gears with load-bearing capacity, the construction ratio should be greater than or equal to 5 if the gears are made of steel; forging ratio should be greater than or equal to 1.5 if the gears are made of steel; and the construction ratio should be less than or equal to 2 (GB/T 132). For materials sensitive to white spots and inner wheels with broken surfaces, the gears and axles should be treated with expansion treatment. Other gears and axles should be in accordance with the regulations of the industry. 4.2.2 The streamline shape of the gears should be distributed in a different shape on the gear section. 4.2.3 The mechanical performance indicators shall not be lower than GB/T 3077, GB/T 6y, GB/T 1 348 current specifications: 4.2.4 The teeth shall not be overheated or overburned, and the grain size shall not be lower than the grain size of the original material. 4.3 Nitriding, nitriding inner wheel materials
The steel used for nitriding and fluoriding long wheels shall contain Cr, V, Mo, Al and other elements that can form or cure at the thin nitrogen temperature F, and the following materials:
1) Nitriding: 40Cr, 35CMo, 42CTMo.25Cr2MoV, 18Cr2N4WA, 34CMoAlA and graded materials, Ruiguang ductile cast titanium.
b) Rapid carbon non-nitriding materials: 45, 40C, 35CrMo: 42CrMo, 25C/2Mov, etc. Jiang. When the gear is designed to be in different positions of the GB/T34 limit zone diagram, it must be recorded according to the following plan: Material selection:
5 Equipment requirements
5.1 Gas nitrogen, ammonia carbon transmission equipment
) When the gear is in the effective heating zone, if it is hot: the equipment should be able to ensure that the temperature is controlled within the preset temperature ±10: in) nitrogen, more carbon to stop the decomposition of ammonia in the furnace can be properly met according to the process requirements: c) oxygen, ammonia can be well sealed according to the process requirements, the gas should evenly contact the gear surface, preferably with a flow device d) The degree of the test effect table is. Level 5 (J?4) point carburizing equipment shall not have sufficient combustion, maintain the gas emission device, the environment 11cN-containing visible light control zone is below 0.3rgm: the number of steps should be denitrified regularly,
5.2 Oxygen and carbon varnishing equipment
JB/T9173—1999
: the equipment shall be equipped with voltage, temperature, vacuum and gas flow measuring instruments, the temperature shall be automatically controlled by the vacuum limit point 6.Pa (5×10om, the rise rate shall not exceed 1.3×10amin【×10-1orrm:nC) and the equipment shall have a reliable temperature improvement device.
5.3 The equipment added to this system
a) should have a well-planned wind protection system, etc.: 6: There should be external devices that eliminate harmful liquids, and should comply with the "Environmental Protection and Change Control" standard
6. 1.1 Common types
Allow the impregnation agent to be: hydrogen, thermal decomposition hydrogen, oxygen, hydrogen, all gases: 6) oxygen and carbon dioxide: methanol, such as carbon dioxide, ammonia, endothermic atmosphere, micro-salt, etc. 6. 1.2 Requirements
The impregnation agent should not produce harmful effects on gears, and should meet the technical conditions of the standard impregnation agent. h.2 Gear paint oxygen: composite paint pretreatment requirements. 2.1 Base treatment
6.2.1.1 Alloy structure Zhao is used for quenching and tempering. The quenching and tempering temperature is not higher than the chlorine temperature by 203: above, and the surface is not allowed to be separated. The quenching and tempering atmosphere should meet the technical conditions. 6.2.1.2 Natural steel nitrogen slow impregnation gears can be used for normalizing treatment when the impact energy requirements are not high. The elasticity should meet the technical conditions of the position. 6.2.2 To deal with the method
For gears with small deformation requirements, the gears shall be subjected to a maximum of one de-annealing before nitriding. The highest temperature shall be lower than the quenching and tempering temperature, but higher than the condensation temperature of the nitriding and oxygen condensation.
6.7.3 Surface treatment
For gears nitriding, the sharp edges must be removed and the gears must be cleaned before nitriding. There shall be no contamination, gasification, or other harmful substances. 6.2.4 Partial anti-filtering
For gears that do not require carbonization, gasification, or other harmful substances, the surface layer shall be coated or coated with anti-coating or combustion pressure induction. 6.2.5 The surface roughness R of the gear to be treated shall be less than 3.2u6.2.6 Tools
6.2. (. Gas-carbon nitriding and carbonization tools shall be reasonably designed and firmly fixed. After a certain period of use, they shall be subjected to de-aging treatment. 6.2. (.2. The gap between the nitriding and the gear should be appropriate to avoid nitriding. 6.3 Gear nitriding and nitriding process 6.3.1 Method group
a; The material composition, pretreatment, metallographic structure, and mechanical properties of the sample should be consistent with those of the gear. The sample should be taken from the gear;
5! The sample size (sample diameter or square sample thickness! Should be close to the circle thickness c) The sample size R should be less than 0.\±m, and there should be no decarburization layer on the surface, oxide scale: rust:! The sample is always placed on a position that can represent the development of the gear. 6.3.2 The furnace of batch workshop should be positioned and heated in the same way as before, so that the medium flow and heating of the whole batch are uniform to reduce the deformation of the core. 6.4 Nitrogen and nitrogen-carbon co-excitation T" 6.4.1 Moisture and parameters The material, shape, environment and technical requirements of the wheel should be selected from the dehumidification and parameters in Table 1. Table! The first section The second section 45c--53 43 (-450480-536) 540~575 480-00 (4.2 Treatment room Hydrogen decomposition rate The first section should be 15- 3546-611 | , -1ih
.5-8 :
515.. 581
According to the requirements of gear material, paint layer depth, etc., 1. The average drop time of 0c1mm per hour shall be determined.
6.4.3 Cooling method
! Gas nitrogen, nitrogen and carbonization can be cooled in the air below 200℃; b. Gas carbonization can be cooled with oil; c. Carbonization can be cooled in general;! In order to reduce the environment, high-speed gears can be cooled in sections. 6.4.4 Cleaning
After carbonization, the gear should be cleaned immediately to neutralize the salt in the gear process, and the residual cleaning should be carried out. The gear filling and carbonization quality control and inspection methods 7. Sample inspection
7. 1.1 Surface hardness test GB5030, GB4140, GR/T1818: The grinding period of the wheel should be as long as the test surface is 1. The driving degree should be in accordance with the technical conditions of the gold standard. The test load is shown in Table 2. 7.1.2 JB/L91721999: The test result should be in accordance with the product technical requirements 7.1.2. 1 Hardness method
To determine the effective hardening degree, use a 4.9N load and measure directly to the hardness limit on the surface of the sample. The test load should be within 1.96~9.6N. When the layer depth is less than 0.3mm: Determine according to GB/T9451 7. t. 2. 2 Metallographic method
Use metallographic method according to GB11: 1354, vertically measure the boundary between the whole and the base year red fabric from the sample surface: when the boundary line of the long fabric is taken, it is impossible to determine the boundary, the hardness method should be used as the standard, 7.1.3 After the short furnace sample is set, measure 3 points at both ends of the large layer, take the flattened piece value as the core Qiong, measure the center 344 or (B23), and the result should be determined according to the technical requirements, 7.1.4 Safety GB11: 354 related observation test indentation stability, measure 1 point for each piece, and at least two points are below the level of the group. 1- is qualified. For the gears with sensitive nails, the products shall be tested after the work is over, and the measurement results shall meet the technical requirements. For the high requirements of the mountain wheel, the acoustic emission method can be used for the test. 7. 1. 5 The evaluation of the surface compound laminar flow compensation interface B door 11354: 1-3 levels are qualified. 7.1. The evaluation of the diffusion layer of the carbon layer and the carbon layer shall meet the technical requirements of the product. The hardness shall be measured by the relative end; the hardness shall be measured by the microhardness door of the product, and the load shall be 0.49--U.98N.
7.1.8 Others
Based on the application requirements or product needs, the surface phase structure or residual stress can be measured. 7.2 Gear quality inspection 7.2.1 Appearance
The gear is oxygenated and carbonized. After carbonization, the surface shall be strictly inspected. There shall be no oxide scale, bruises, peeling, arc burns, and other defects. 7.2.2 Surface hardness
For gears produced in batches, when they pass the subsequent testing, one piece shall be inspected for each gear, and one tooth shall be measured at a distance of about 120° from each other, and 1-! Points can also be measured with a hardness tester (HRISN 9172-1999). b: When the follow-up inspection fails, the gears that have not been inspected should be taken out of the furnace. 3 gear teeth should be measured for each piece, and 1-3 points should be measured for each gear tooth.) For gears that have not been inspected, the measured value of the follow-up sample is generally used as the standard. d: If the hardness does not meet the requirements of the modern parts, the gears should be repaired or inspected according to the specific situation. 2.3 Depth of paint layer and center hardness of gear teeth. (2.3 Depth of paint layer and center hardness of gear teeth.) Gears produced by the mother company should be inspected regularly under the conditions of follow-up inspection or optional inspection. If the follow-up sample is not qualified, at least one gear should be inspected. Inspection method 7.1.2, 7.1.3: b "For single-piece gears, the measurement of the furnace test shall prevail. After negotiation, the wooden end of a gear tooth may be ground and polished along one to two sides, and the depth of the entire layer shall be marked with a large mirror with a scale. Use a Shore hardness tester to test the hardness of the center of the gear tooth. The measurement result shall be consistent with the product drawing and the specification value of the technical part. The average hardness of the small nitrided layer shall be within 15% of the technical requirements. 7.2.4 Random inspection of the nitrided layer, the nitrided layer, the nitrided layer morphology, and the nitride layer of the gear. Same inspection as 7.1.4, 7.1.5: 7.1.6, 7.2.5 Deformation
For gears with high deformation requirements, check 1~3 pieces, and use the corresponding disc to check the geometric accuracy of the gear. The structure should meet the requirements of technical conditions. 1.6 Local anti-corrosion
Use meat to observe the rear anti-corrosion part. The plate should basically maintain the color. If it is found that it is right, use a hardness tester or a high-precision tester to check it. It should not affect the cutting process. JBT9172-12
Appendix A
【Appendix to the requirements】
Common material selection table A for oxygen and hydrogen-carbon copolymer gears】Year, Micro-Gang gear material selection mountain consumption equipment city limit
Proposed ticket
≤651
303-55C
50 -14000
:0G0-:250
pre-fatigue cn
25-2X0
25G-300
3no-350
350-420
make the core active pressure T light layer depth:n:n with:
2 material core pit strength standard child one Gm
: the table abandons the micro connection for energy promotion conditions: 1 special use of the point wheel whole user and the system through the factory to take other use
ball light body ball full anti-iron
SRCrMOA!A
2r'rMm
25Y2MoV
:SCr2Ni4WA
Anduo, new stop law government
install to drive1 Tide and parameters
Extremely sensitive wheel material, shape, environment education and technical tickets require the selection of the retreat and parameters in Table 1. Table!
First paragraph "Second paragraph
45c--53
43(-450480-536)
540~575
480-00
(4.2 treatment room
hydrogen decomposition rate
First strong you section to do
15- 3546-611
18-3050~70
500-530
Martial Medicine Period
: 3C:- 411
First version of the paragraph
-4.5t-530
480-550
1509-53c!
(k, -1ih
.5-8 :
515.. 581
According to the requirements of gear material, paint layer depth, etc. 1. The average drop time of 0c1mm per hour is determined by the process type.
6.4.3 Cooling method
! Gas paint nitrogen, nitrogen, exciton nitrogen and carbonization are cooled in the air below 200℃; b" Gas atmosphere carburizing can be used after oil cooling; c! The maximum amount of carbonization is generally cooled after rolling;! In order to reduce the environment, the gear with high speed and low rate can be cooled in sections. 6. 4. 4 Cleaning
After carbonization, it is necessary to wash the gear immediately to neutralize the salt in the gear process, clean the gear, and the gear quality control and inspection method 7. Sample inspection
7. 1.1 Surface hardness test GB5030, GB4140, GR/T1818: The grinding period of the wheel should be as long as the test surface is 1. The driving degree should be in accordance with the technical conditions of the gold standard. The test load is shown in Table 2. 7.1.2 JB/L91721999: The test result should be in accordance with the product technical requirements 7.1.2. 1 Hardness method
To determine the effective hardening degree, use a 4.9N load and measure directly to the hardness limit on the surface of the sample. The test load should be within 1.96~9.6N. When the layer depth is less than 0.3mm: Determine according to GB/T9451 7. t. 2. 2 Metallographic method
Use metallographic method according to GB11: 1354, vertically measure the boundary between the whole and the base year red fabric from the sample surface: when the boundary line of the long fabric is taken, it is impossible to determine the boundary, the hardness method should be used as the standard, 7.1.3 After the short furnace sample is set, measure 3 points at both ends of the large layer, take the flattened piece value as the core Qiong, measure the center 344 or (B23), and the result should be determined according to the technical requirements, 7.1.4 Safety GB11: 354 related observation test indentation stability, measure 1 point for each piece, and at least two points are below the level of the group. 1- is qualified. For the gears with sensitive nails, the products shall be tested after the work is over, and the measurement results shall meet the technical requirements. For the high requirements of the mountain wheel, the acoustic emission method can be used for the test. 7. 1. 5 The evaluation of the surface compound laminar flow compensation interface B door 11354: 1-3 levels are qualified. 7.1. The evaluation of the diffusion layer of the carbon layer and the carbon layer shall meet the technical requirements of the product. The hardness shall be measured by the relative end; the hardness shall be measured by the microhardness door of the product, and the load shall be 0.49--U.98N.
7.1.8 Others
Based on the application requirements or product needs, the surface phase structure or residual stress can be measured. 7.2 Gear quality inspection 7.2.1 Appearance
The gear is oxygenated and carbonized. After carbonization, the surface shall be strictly inspected. There shall be no oxide scale, bruises, peeling, arc burns, and other defects. 7.2.2 Surface hardness
For gears produced in batches, when they pass the subsequent testing, one piece shall be inspected for each gear, and one tooth shall be measured at a distance of about 120° from each other, and 1-! Points can also be measured with a hardness tester (HRISN 9172-1999). b: When the follow-up inspection fails, the gears that have not been inspected should be taken out of the furnace. 3 gear teeth should be measured for each piece, and 1-3 points should be measured for each gear tooth.) For gears that have not been inspected, the measured value of the follow-up sample is generally used as the standard. d: If the hardness does not meet the requirements of the modern parts, the gears should be repaired or inspected according to the specific situation. 2.3 Depth of paint layer and center hardness of gear teeth. (2.3 Depth of paint layer and center hardness of gear teeth.) Gears produced by the mother company should be inspected regularly under the conditions of follow-up inspection or optional inspection. If the follow-up sample is not qualified, at least one gear should be inspected. Inspection method 7.1.2, 7.1.3: b "For single-piece gears, the measurement of the furnace test shall prevail. After negotiation, the wooden end of a gear tooth may be ground and polished along one to two sides, and the depth of the entire layer shall be marked with a large mirror with a scale. Use a Shore hardness tester to test the hardness of the center of the gear tooth. The measurement result shall be consistent with the product drawing and the specification value of the technical part. The average hardness of the small nitrided layer shall be within 15% of the technical requirements. 7.2.4 Random inspection of the nitrided layer, the nitrided layer, the nitrided layer morphology, and the nitride layer of the gear. Same inspection as 7.1.4, 7.1.5: 7.1.6, 7.2.5 Deformation
For gears with high deformation requirements, check 1~3 pieces, and use the corresponding disc to check the geometric accuracy of the gear. The structure should meet the requirements of technical conditions. 1.6 Local anti-corrosion
Use meat to observe the rear anti-corrosion part. The plate should basically maintain the color. If it is found that it is right, use a hardness tester or a high-precision tester to check it. It should not affect the cutting process. JBT9172-12
Appendix A
【Appendix to the requirements】
Common material selection table A for oxygen and hydrogen-carbon copolymer gears】Year, Micro-Gang gear material selection mountain consumption equipment city limit
Proposed ticket
≤651
303-55C
50 -14000
:0G0-:250
pre-fatigue cn
25-2X0
25G-300
3no-350
350-420
make the core active pressure T light layer depth:n:n with:
2 material core pit strength standard child one Gm
: the table abandons the micro connection for energy promotion conditions: 1 special use of the point wheel whole user and the system through the factory to take other use
ball light body ball full anti-iron
SRCrMOA!A
2r'rMm
25Y2MoV
:SCr2Ni4WA
Anduo, new stop law government
install to drive1 Tide and parameters
Extremely sensitive wheel material, shape, environment education and technical tickets require the selection of the retreat and parameters in Table 1. Table!
First paragraph "Second paragraph
45c--53
43(-450480-536)
540~575
480-00
(4.2 treatment room
hydrogen decomposition rate
First strong you section to do
15- 3546-611
18-3050~70
500-530
Martial Medicine Period
: 3C:- 411
First version of the paragraph
-4.5t-530
480-550
1509-53c!
(k, -1ih
.5-8 :
515.. 581
According to the requirements of gear material, paint layer depth, etc. 1. The average drop time of 0c1mm per hour is determined by the process type.
6.4.3 Cooling method
! Gas paint nitrogen, nitrogen, exciton nitrogen and carbonization are cooled in the air below 200℃; b" Gas atmosphere carburizing can be used after oil cooling; c! The maximum amount of carbonization is generally cooled after rolling;! In order to reduce the environment, the gear with high speed and low rate can be cooled in sections. 6. 4. 4 Cleaning
After carbonization, it is necessary to wash the gear immediately to neutralize the salt in the gear process, clean the gear, and the gear quality control and inspection method 7. Sample inspection
7. 1.1 Surface hardness test GB5030, GB4140, GR/T1818: The grinding period of the wheel should be as long as the test surface is 1. The driving degree should be in accordance with the technical conditions of the gold standard. The test load is shown in Table 2. 7.1.2 JB/L91721999: The test result should be in accordance with the product technical requirements 7.1.2. 1 Hardness method
To determine the effective hardening degree, use a 4.9N load and measure directly to the hardness limit on the surface of the sample. The test load should be within 1.96~9.6N. When the layer depth is less than 0.3mm: Determine according to GB/T9451 7. t. 2. 2 Metallographic method
Use metallographic method according to GB11: 1354, vertically measure the boundary between the whole and the base year red fabric from the sample surface: when the boundary line of the long fabric is taken, it is impossible to determine the boundary, the hardness method should be used as the standard, 7.1.3 After the short furnace sample is set, measure 3 points at both ends of the large layer, take the flattened piece value as the core Qiong, measure the center 344 or (B23), and the result should be determined according to the technical requirements, 7.1.4 Safety GB11: 354 related observation test indentation stability, measure 1 point for each piece, and at least two points are below the level of the group. 1- is qualified. For the gears with sensitive nails, the products shall be tested after the work is over, and the measurement results shall meet the technical requirements. For the high requirements of the mountain wheel, the acoustic emission method can be used for the test. 7. 1. 5 The evaluation of the surface compound laminar flow compensation interface B door 11354: 1-3 levels are qualified. 7.1. The evaluation of the diffusion layer of the carbon layer and the carbon layer shall meet the technical requirements of the product. The hardness shall be measured by the relative end; the hardness shall be measured by the microhardness door of the product, and the load shall be 0.49--U.98N.
7.1.8 Others
Based on the application requirements or product needs, the surface phase structure or residual stress can be measured. 7.2 Gear quality inspection 7.2.1 Appearance
The gear is oxygenated and carbonized. After carbonization, the surface shall be strictly inspected. There shall be no oxide scale, bruises, peeling, arc burns, and other defects. 7.2.2 Surface hardness
For gears produced in batches, when they pass the subsequent testing, one piece shall be inspected for each gear, and one tooth shall be measured at a distance of about 120° from each other, and 1-! Points can also be measured with a hardness tester (HRISN 9172-1999). b: When the follow-up inspection fails, the gears that have not been inspected should be taken out of the furnace. 3 gear teeth should be measured for each piece, and 1-3 points should be measured for each gear tooth.) For gears that have not been inspected, the measured value of the follow-up sample is generally used as the standard. d: If the hardness does not meet the requirements of the modern parts, the gears should be repaired or inspected according to the specific situation. 2.3 Depth of paint layer and center hardness of gear teeth. (2.3 Depth of paint layer and center hardness of gear teeth.) Gears produced by the mother company should be inspected regularly under the conditions of follow-up inspection or optional inspection. If the follow-up sample is not qualified, at least one gear should be inspected. Inspection method 7.1.2, 7.1.3: b "For single-piece gears, the measurement of the furnace test shall prevail. After negotiation, the wooden end of a gear tooth may be ground and polished along one to two sides, and the depth of the entire layer shall be marked with a large mirror with a scale. Use a Shore hardness tester to test the hardness of the center of the gear tooth. The measurement result shall be consistent with the product drawing and the specification value of the technical part. The average hardness of the small nitrided layer shall be within 15% of the technical requirements. 7.2.4 Random inspection of the nitrided layer, the nitrided layer, the nitrided layer morphology, and the nitride layer of the gear. Same inspection as 7.1.4, 7.1.5: 7.1.6, 7.2.5 Deformation
For gears with high deformation requirements, check 1~3 pieces, and use the corresponding disc to check the geometric accuracy of the gear. The structure should meet the requirements of technical conditions. 1.6 Local anti-corrosion
Use meat to observe the rear anti-corrosion part. The plate should basically maintain the color. If it is found that it is right, use a hardness tester or a high-precision tester to check it. It should not affect the cutting process. JBT9172-12
Appendix A
【Appendix to the requirements】
Common material selection table A for oxygen and hydrogen-carbon copolymer gears】Year, Micro-Gang gear material selection mountain consumption equipment city limit
Proposed ticket
≤651
303-55C
50 -14000
:0G0-:250
pre-fatigue cn
25-2X0
25G-300
3no-350
350-420
make the core active pressure T light layer depth:n:n with:
2 material core pit strength standard child one Gm
: the table abandons the micro connection for energy promotion conditions: 1 special use of the point wheel whole user and the system through the factory to take other use
ball light body ball full anti-iron
SRCrMOA!A
2r'rMm
25Y2MoV
:SCr2Ni4WA
Anduo, new stop law government
install to drive1 Surface hardness test GB5030, GB4140, GR/T1818: The grinding period should be up to 100%, and the test surface should be ground as follows: The degree should comply with the technical conditions of the gold standard, and the test load is shown in Table 2. Social Education and Melting Handian
Yongshi Ze Free
7.1.2 Spring Civil Insurance
JB/L91721999
The test result should meet the product technical requirements 7.1.2.1 Hardness method
Determine the effective hardness, select 4.9N load, and measure the sample surface directly to the limit hardness. The test load is within 1.96~! 9.6N. When the shifting depth is less than 0.3mM: measure according to GB/T9451 7. t. 2. 2 Metallographic method
Use metallographic method according to GD! 1354 stipulates that the vertical measurement from the sample surface and the base red weave boundary can resist the height: when the boundary line of the long weave cannot be determined, the hardness method should be used as the standard. 7.1.3 After the short furnace sample is set, measure the 3-point accuracy at two places on the large layer, take the flattened piece value as the core Qiong surface, measure the center 344 or (B23), and the result should be determined by the method according to the technical requirements. 7.1.4 GB11:354 stipulates that the indentation stability test must be carried out around the test mark. Each piece is measured at 1 point, and at least two points are in the lower alternating group. 1-level is qualified. For the gear transmission with inductive force, the test product shall be tested after the work is completed. The measurement results shall comply with the technical requirements. For the high-requirement mountain wheel, the acoustic emission method can be used for the test details after the effective method is copied. 7. 1. 5. Evaluation of the surface compound laminar flow compensation joint of the layer B11354: 1-3 levels are suitable. 7.1. Evaluation of the surface compound laminar flow compensation joint of the layer B11354: 1-3 levels are suitable. 1. The hardness and hardness of the carbon layer, carbon layer and carbon compound layer shall meet the various technical requirements of the product. The hardness shall be measured by residual phase end; the hardness shall be measured by product microhardness tester, and the load shall be 0.49--U.98N.
7.1.8 Others
According to the product requirements or product needs, the composition of the surface phase structure or residual stress can be measured. 7.2 Quality inspection of gear teeth 7.2.1 Appearance
After the wheel is oxygen-permeated and high-carbon-permeated, the surface shall be strictly inspected. There shall be no oxide scale, bruises, peeling, arc burning 7.2.2 Surface hardness For gears produced in batches, when the subsequent test is qualified, one piece shall be inspected for each batch, and 1-2 points of each gear tooth at a distance of about 120° shall be measured at the middle of the tooth. The hardness of each gear tooth can also be measured with a hardness tester (HRISN 59172-1999). b. When the subsequent inspection fails, the gears that have not been inspected shall be taken out of the furnace and 3 gear teeth shall be measured for each piece, and 1-3 points shall be measured for each gear tooth. d. For gears that have not been inspected, the measured value of the subsequent test sample shall prevail. 3. If the hardness does not meet the requirements of the system, the gears shall be repaired or repaired according to the specific situation. 4.2.3 Depth of paint layer and center hardness of gear teeth. 5.2.3 Depth of paint layer and center hardness of gear teeth. 6.2.3 Depth of paint layer and center hardness of gear teeth. 7 ... The test sample is not qualified, and at least one gear is tested. Inspection method 7.1.2, 7.1.3: b "For single gears, the furnace test measurement shall prevail. After negotiation, the wooden end of one gear tooth can be ground and polished along one to two sides, and the depth of the whole layer can be marked with a large mirror with a degree of accuracy. Use a Shore hardness tester to test the hardness of the center of the gear tooth. The measurement result should be consistent with the product drawing and the technical specification value of the parts. The average degree of the nitriding layer is 15% of the technical requirements. 7.2.4 Random inspection of nitriding, nitriding layer, nitriding layer sparseness, and nitride morphology of oil-free gears. Same inspection as 7.1.4, 7.1.5: 7.1.6, 7.2.5 Deformation
For gears with high deformation requirements, check 1~3 pieces, and use the corresponding disc to check the geometric accuracy of the gear. The structure should meet the requirements of technical conditions. 1.6 Local anti-corrosion
Use meat to observe the rear anti-corrosion part. The plate should basically maintain the color. If it is found that it is right, use a hardness tester or a high-precision tester to check it. It should not affect the cutting process. JBT9172-12
Appendix A
【Appendix to the requirements】
Common material selection table A for oxygen and hydrogen-carbon copolymer gears】Year, Micro-Gang gear material selection mountain consumption equipment city limit
Proposed ticket
≤651
303-55C
50 -14000
:0G0-:250
pre-fatigue cn
25-2X0
25G-300bzxz.net
3no-350
350-420
make the core active pressure T light layer depth:n:n with:
2 material core pit strength standard child one Gm
: the table abandons the micro connection for energy promotion conditions: 1 special use of the point wheel whole user and the system through the factory to take other use
ball light body ball full anti-iron
SRCrMOA!A
2r'rMm
25Y2MoV
:SCr2Ni4WA
Anduo, new stop law government
install to drive1 Surface hardness test GB5030, GB4140, GR/T1818: The grinding period should be up to 100%, and the test surface should be ground as follows: The degree should comply with the technical conditions of the gold standard, and the test load is shown in Table 2. Social Education and Melting Handian
Yongshi Ze Free
7.1.2 Spring Civil Insurance
JB/L91721999
The test result should meet the product technical requirements 7.1.2.1 Hardness method
Determine the effective hardness, select 4.9N load, and measure the sample surface directly to the limit hardness. The test load is within 1.96~! 9.6N. When the shifting depth is less than 0.3mM: measure according to GB/T9451 7. t. 2. 2 Metallographic method
Use metallographic method according to GD! 1354 stipulates that the vertical measurement from the sample surface and the base red weave boundary can resist the height: when the boundary line of the long weave cannot be determined, the hardness method should be used as the standard. 7.1.3 After the short furnace sample is set, measure the 3-point accuracy at two places on the large layer, take the flattened piece value as the core Qiong surface, measure the center 344 or (B23), and the result should be determined by the method according to the technical requirements. 7.1.4 GB11:354 stipulates that the indentation stability test must be carried out around the test mark. Each piece is measured at 1 point, and at least two points are in the lower alternating group. 1-level is qualified. For the gear transmission with inductive force, the test product shall be tested after the work is completed. The measurement results shall comply with the technical requirements. For the high-requirement mountain wheel, the acoustic emission method can be used for the test details after the effective method is copied. 7. 1. 5. Evaluation of the surface compound laminar flow compensation joint of the layer B11354: 1-3 levels are suitable. 7.1. Evaluation of the surface compound laminar flow compensation joint of the layer B11354: 1-3 levels are suitable. 1. The hardness and hardness of the carbon layer, carbon layer and carbon compound layer shall meet the various technical requirements of the product. The hardness shall be measured by residual phase end; the hardness shall be measured by product microhardness tester, and the load shall be 0.49--U.98N.
7.1.8 Others
According to the product requirements or product needs, the composition of the surface phase structure or residual stress can be measured. 7.2 Quality inspection of gear teeth 7.2.1 Appearance
After the wheel is oxygen-permeated and high-carbon-permeated, the surface shall be strictly inspected. There shall be no oxide scale, bruises, peeling, arc burning 7.2.2 Surface hardness For gears produced in batches, when the subsequent test is qualified, one piece shall be inspected for each batch, and 1-2 points of each gear tooth at a distance of about 120° shall be measured at the middle of the tooth. The hardness of each gear tooth can also be measured with a hardness tester (HRISN 59172-1999). b. When the subsequent inspection fails, the gears that have not been inspected shall be taken out of the furnace and 3 gear teeth shall be measured for each piece, and 1-3 points shall be measured for each gear tooth. d. For gears that have not been inspected, the measured value of the subsequent test sample shall prevail. 3. If the hardness does not meet the requirements of the system, the gears shall be repaired or repaired according to the specific situation. 4.2.3 Depth of paint layer and center hardness of gear teeth. 5.2.3 Depth of paint layer and center hardness of gear teeth. 6.2.3 Depth of paint layer and center hardness of gear teeth. 7 ... The test sample is not qualified, and at least one gear is tested. Inspection method 7.1.2, 7.1.3: b "For single gears, the furnace test measurement shall prevail. After negotiation, the wooden end of one gear tooth can be ground and polished along one to two sides, and the depth of the whole layer can be scratched with a large mirror with a degree of accuracy. Use a Shore hardness tester to test the hardness of the center of the gear tooth. The measurement result should be consistent with the product drawing and the technical specification value of the parts. The average degree of the nitriding layer is 15% of the technical requirements. 7.2.4 Random inspection of nitriding, nitriding layer, nitriding layer sparseness, and nitride morphology of oil-free gears. Same inspection as 7.1.4, 7.1.5: 7.1.6, 7.2.5 Deformation
For gears with high deformation requirements, check 1~3 pieces, and use the corresponding disc to check the geometric accuracy of the gear. The structure should meet the requirements of technical conditions. 1.6 Local anti-corrosion
Use meat to observe the rear anti-corrosion part. The plate should basically maintain the color. If it is found that it is right, use a hardness tester or a high-precision tester to check it. It should not affect the cutting process. JBT9172-12
Appendix A
【Appendix to the requirements】
Common material selection table A for oxygen and hydrogen-carbon copolymer gears】Year, Micro-Gang gear material selection mountain consumption equipment city limit
Proposed ticket
≤651
303-55C
50 -14000
:0G0-:250
pre-fatigue cn
25-2X0
25G-300
3no-350
350-420
make the core active pressure T light layer depth:n:n with:
2 material core pit strength standard child one Gm
: the table abandons the micro connection for energy promotion conditions: 1 special use of the point wheel whole user and the system through the factory to take other use
ball light body ball full anti-iron
SRCrMOA!A
2r'rMm
25Y2MoV
:SCr2Ni4WA
Anduo, new stop law government
install to driveb" For single-piece gears, the measurement of the furnace test shall prevail. After negotiation, the wooden end of a gear tooth can be ground and polished along one to two sides, and the depth of the entire layer can be marked with a large mirror with a degree of accuracy. Use a Shore hardness tester to test the hardness of the center of the gear tooth. The measurement result should be consistent with the product drawing and the specification value of the technical part. The average degree of nitriding, nitriding and nitriding layer is 15% of the technical requirements. 7.2.4 Random inspection of nitriding, nitriding and nitriding layer properties, nitriding layer sparseness, and nitride morphology of gears. Same inspection as 7.1.4, 7.1.5: 7.1.6, 7.2.5 Deformation
For gears with high deformation requirements, check 1~3 pieces, and use the corresponding disc to check the geometric accuracy of the gear. The structure should meet the requirements of technical conditions. 1.6 Local anti-corrosion
Use meat to observe the rear anti-corrosion part. The plate should basically maintain the color. If it is found that it is right, use a hardness tester or a high-precision tester to check it. It should not affect the cutting process. JBT9172-12
Appendix A
【Appendix to the requirements】
Common material selection table A for oxygen and hydrogen-carbon copolymer gears】Year, Micro-Gang gear material selection mountain consumption equipment city limit
Proposed ticket
≤651
303-55C
50 -14000
:0G0-:250
pre-fatigue cn
25-2X0
25G-300
3no-350
350-420
make the core active pressure T light layer depth:n:n with:
2 material core pit strength standard child one Gm
: the table abandons the micro connection for energy promotion conditions: 1 special use of the point wheel whole user and the system through the factory to take other use
ball light body ball full anti-iron
SRCrMOA!A
2r'rMm
25Y2MoV
:SCr2Ni4WA
Anduo, new stop law government
install to driveb" For single-piece gears, the measurement of the furnace test shall prevail. After negotiation, the wooden end of a gear tooth can be ground and polished along one to two sides, and the depth of the entire layer can be marked with a large mirror with a degree of accuracy. Use a Shore hardness tester to test the hardness of the center of the gear tooth. The measurement result should be consistent with the product drawing and the specification value of the technical part. The average degree of nitriding, nitriding and nitriding layer is 15% of the technical requirements. 7.2.4 Random inspection of nitriding, nitriding and nitriding layer properties, nitriding layer sparseness, and nitride morphology of gears. Same inspection as 7.1.4, 7.1.5: 7.1.6, 7.2.5 Deformation
For gears with high deformation requirements, check 1~3 pieces, and use the corresponding disc to check the geometric accuracy of the gear. The structure should meet the requirements of technical conditions. 1.6 Local anti-corrosion
Use meat to observe the rear anti-corrosion part. The plate should basically maintain the color. If it is found that it is right, use a hardness tester or a high-precision tester to check it. It should not affect the cutting process. JBT9172-12
Appendix A
【Appendix to the requirements】
Common material selection table A for oxygen and hydrogen-carbon copolymer gears】Year, Micro-Gang gear material selection mountain consumption equipment city limit
Proposed ticket
≤651
303-55C
50 -14000
:0G0-:250
pre-fatigue cn
25-2X0
25G-300
3no-350
350-420
make the core active pressure T light layer depth:n:n with:
2 material core pit strength standard child one Gm
: the table abandons the micro connection for energy promotion conditions: 1 special use of the point wheel whole user and the system through the factory to take other use
ball light body ball full anti-iron
SRCrMOA!A
2r'rMm
25Y2MoV
:SCr2Ni4WA
Anduo, new stop law government
install to drive
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