1 Scope
This standard specifies the technical requirements and inspection methods and rules of the rolling bearing rings and rolling elements (hereinafter referred to as "bearing parts"), which are made from G95Cr18 (original grade is 9Cr18), G102Cr18Mo (original grade is 9Cr18Mo) and G65Cr14Mo stainless steel meeting the requirements of GB/T 3086-2008, after annealing, quenching and tempering.
This standard is applicable to the heat treatment quality inspection of bearing parts made from the above-mentioned materials.
2 Normative References
The following documents contain provisions which, through reference in this standard, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding corrections to), or revisions of, any of these publications do not apply. However, the parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards. For undated references, the latest edition of the normative document referred to applies.
GB/T 230.1-2009 Metallic Materials-Rockwell Hardness Test-Part 1: Test Method (Scales A, B, C, D, E, F, G, H, K, N, T) (ISO 6508-1: 2005, MOD)
GB/T 231.1-2009 Metallic Materials-Brinell Hardness Test-Part 1: Test Method (ISO 6506-1: 2005, MOD)
GB/T 1172-1999 Conversion of Hardness and Strength for Ferrous Metal
GB/T 3086-2008 High Carbon Chromium Stainless Bearing Steels
GB/T 4340.1-2009 Metallic Materials-Vickers Hardness Test-Part 1: Test Method (ISO 6507-1: 1997, MOD)
GB/T 24606-2009 Rolling Bearings-Non-destructive Testing-Magnetic Particle Testing
JB/T 1255 -2001 Specification for heat-treatment of rolling bearing parts made from high carbon chromium steel
JB/T 7361-2007 Rolling Bearings-Test Method for Hardness of Parts
JB/T 7362-2007 Rolling bearing-Measurement Method for Decarburized Layer Depth of Parts
Contents
Foreword I
1 Scope
2 Normative References
3 Technical Requirements
3.1 Technical Requirements of Bearing Parts after Annealing
3.2 Technical Requirements of Bearing Parts after Quenching and Tempering
3.3 Miscellaneous
4 Inspection Methods and Rules
Appendix A (Normative) Corrected Value of Ball Hardness
Appendix B (Normative) Corrected Value of Cylindrical (Circular Conical) Surface Hardness of Roller
Appendix C (Normative) Inspection Regulations of Pickling
C.1 Inspection Regulations of Cold Pickling
C.2 Inspection Regulations of Hot Pickling
C.3 Inspection Regulations of Corrosion Resistance
C.4 Inspection Regulations on Mixing of Steel Grades
C.5 Inspection Regulations of Surface Defect of Rolling Element
Appendix D (Normative) Crushing Load Value of Steel Ball
Appendix E (Informative) Descriptions of Grading Figure of Quenching and Tempering Microstructure
