JB/T 10174-2000 Quality inspection method for shot peening of steel parts
Some standard content:
IC5 25.200
Machinery Industry Standard of the People's Republic of China
JB/T10174—2000
Methods of quality inspection on shot-peening for steel-iron parts2000-03-30 Issued
State Machinery Industry Bureau
24100-1(-01 Implementation
JB/F101742000
This standard defines the terms related to the quality inspection of shot peening. At the same time, it stipulates the projectiles used for shot peening, the detection equipment, the measurement and quality control of shot peening intensity and weight. Appendix A of this standard is the summary of the standard.
This standard was issued by the National Technical Committee for Heat Treatment Standardization and was drafted by the Heat Treatment Plant of China First Automobile Group Corporation and Changyu Automobile Materials Research Institute. The main drafters of this standard are: Zhao Keyi, Shi Zhengli, Ren You, Xu Zhao-yi, Lao Shan. General Machinery Industry Standard of the People's Republic of China
Methnds of quality inspection methods for shot peening for steel-iron parts Parts Model
JB./710174-2000
The core standard specifies the types of projectiles used for spraying, technical requirements, test equipment, determination of shot strength and coverage rate. This standard is applicable to the inspection of wet nozzles for steel parts. 2 Referenced standards
The texts of the 5 referenced standards constitute the provisions of this standard through the references in the cold external standard. When the full standard is published, the title is valid, and all standards will be strictly followed. All parties using this standard should explore the possibility of using the latest version of the following test standards. GB:T2301991
GB:T1298—1986
GB-T 6003.1—1997
YB/T1038—1993
YB/T 5[49—1993
3 Specifications
This standard applies to the following definitions:
Metal Shot Peening Test Method
Magnetic 1 Steel Technical Conditions
Gold Wire Weave Test, etc.
Spring Steel, Cold Rolled Steel End
Copper Shot
3.1 Shot Peening
High-speed shot is fired onto the surface of steel parts, and the surface layer of the parts undergoes plastic deformation due to the impact, thereby generating surface compressive stress, which improves the anti-fatigue performance and stress corrosion resistance of the parts. 3.2 Almen Arc Height Test is a special gauge for comprehensively measuring the process parameters of shot peening, using shot density (should meet the requirements of YR, T 505 relevant regulations) example, a total of 3 sizes, their models are: N, A, C, 3.3 Jinggaoxiao arcnighvaiuebZxz.net
The standard Al factory test gauge is set on it. Single-sided intensive spraying is carried out. Under the impact of the projectile, the double-height test piece undergoes plastic deformation, causing the test piece to bend spherically toward the spraying surface. Then the test height is measured with an account height meter to check the test rise bending strength height. 3.4 Shot time shottimc
The number of days from the start of shot peening to the 100% cumulative rate of the sprayed part is called 3.5 Strong sherstreheth
It is an indicator of the surface peening process. This is a function of the design parameters (parts material, small bullet, shot can be sprayed continuously and spraying time)! Generally, only weak height test pieces (Almen test pieces) are used for strong shot peening. The arc height generated under the effective spraying time is increased by times. When the value is less than or equal to 10%, the corresponding coverage rate is less than 100%, and the resulting increase in force value comes from the National Machinery Industry Bureau 20HH-3-30 approved
2000-10-0 application
Table ri covertrate
TB/T10174-2000
The degree of pits on the surface of the sprayed parts is measured at the specified position on the sprayed surface. The ratio between the area of the single mark and the blood area of the evil reinforcement pill The surface coverage of more than 100% is calculated by the shot peening time. 4. Shot materials for strengthening shot
4.1 Shot types
Cast steel shot (cut steel shot with corners removed by initial peening can also be used), must comply with the provisions of YB/T5149 4.2 Technical requirements for shot
4.2. The shape, texture, chemical composition, hardness, metallographic structure, crack and density of the shot must comply with the provisions of YB/T5149 4.2.2 The size of the part, its shape, mesh or fox shape, required shot peening intensity and surface roughness, etc., when over-peening the fillet of the part, the size of the shot should meet the following requirements: a) the shot size should be less than 12 of the smallest semi-hydroxyl in the shot area; b) the shot size should be less than 1/3 of the chain groove width; d) when the shot must pass through the seam to strengthen the surface below, its size should be less than 1/10 of the chain width; d) when the shot must pass through the seam to strengthen the surface below, its size should be less than 1/10 of the chain width; d) the size specifications of cast steel shots are shown in Table 1, and the screen specifications should comply with the relevant provisions of GB/T 6003.1, Table! The size specification of chemical steel projectiles is suitable for the network size, and the network size can be ten, and the steel projectile must pass the network requirements and the remaining pass the network requirements to stop 85% 11, 2G6 respectively 1.0mm and m of the projectile 2, the table ten to measure, to stop 97% of the wine: 10% (melx) than 85% (min :
Stop 10%
Stop 80%
5 Testing device
JB/T1+174-2000
Use arc bottom test piece to measure the strength of the sprayed parts. The test piece specifications and connection requirements are shown in Table 2. The hardness measurement force before clothing should comply with the relevant provisions of GBT230.
2 Dimensional parameters and technical requirements of standard arc height test piece. Name
Flatness tolerance
Surface blood μm
Surface quality
0.8 -0.025
73-76HBA
Test piece model
1.3 ± U0.025
19. *7G ±0.2
44-50 HRC
2.4 ± 0.025
44-50 HRC
In the range of arc height of 0.15~0.60mm, test piece A is used; when the strength is low, test piece N is used; when the strength is high, test piece C is used. See Table 3 for applicable specifications, and the relationship between the test pieces is recorded (Appendix Table 3 of the standard for the applicable specifications of various test pieces
Applicable specifications
Test piece fixing tool
D.15.-0.60
Test fixing tool ratio 1, the tool material shall comply with the relevant provisions of GH12, Figure! Fixing test piece fire tool (workmanship, hardness state] C
5.3 Strength measurement position
JB/TJ0T74
Arc height should be measured Measuring instrument, see Figure 2. The material of the test piece positioning pin shall comply with the relevant provisions of GB/T1298 1. -Digital indicator: 2. Digit indicator bracket: -Digital indicator fixing pin: 4. -Steel ball (d=mm: 5. -Test piece positioning pin (magnetic agent, fire] Figure 2. Arc height fixture (scale value is 0.025mm) 6. Shot peening intensity and coverage measurement
6. [Shot peening intensity standard and measurement
6.1. [Shot peening intensity standard method
Color measurement reading and test piece type used, for example: 0.45'A, 0.45
Test piece type is A type
Measuring instrument reading: 0.45mm
6.1.2. First, correct the height difference to zero, that is, use the standard plane test piece to place it under the probe of the measuring instrument, adjust the dial, turn the test piece to the ground, and adjust the standard zero point. Then align the center of the sprayed test piece with the probe of the measuring instrument, and read the indicator of the instrument. This is the height difference! The spraying under the process conditions is important, right, 2. The coverage rate measurement technology
JB/T10174-2H0
The coverage rate of the part surface can be checked with a 10x magnifying glass. When there is doubt about the coverage obtained in a known shot peening cycle, a specimen (102 m*102 mm2) of the same material and hardness as the part is shot peened under the same conditions as the part. Afterwards, the test piece is examined under a microscope and the image is projected onto a small piece of glass. The total surface area of all the peened areas of several observation parts is measured by an integrator and the average value is taken to strengthen the quality control of the shot peening. 7.1 According to the working conditions of the steelmaking part and the requirements for performance, the shot peening amplitude value is determined according to the technical requirements of the product drawing and should be above 0.35A. 2 The surface coverage rate should meet the technical requirements of the product drawing and should generally be not less than 200%. 7. Select the appropriate shot peening intensity for different parts. For extremely thin or small-section parts, high shot peening intensity shall not be used to prevent residual stress in the center of the part from causing deformation. 7.4 The shot peening area of the part needs to be specially 7.5 After shot peening, parts shall not be shaped by any other mechanical method except shot peening force method. 7.6 After shot peening: If the parts are heated, the salt temperature should be controlled within 20 °C. 7.7 If grinding or polishing is required, the surface depth of the shot peening parts should not exceed 10% of the arc height of the shot peening test piece. |8 Hardness test should not be done on the shot peened part of the part. 7.9 After shot peening, the part should be protected from corrosion until the next T sequence. f
JB Hall 0174-2080
Appendix A
【Standard Appendix】
Relationship between the test pieces of the height
Relationship between the test pieces of the height of the arc A, N, and C is shown in Figure AID.70
Temperature cANmm
Figure A1 Relationship between the test pieces of A, N, and C
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