Standard No.:	JB/T 7363-2011
English Name:	Rolling bearings － Bearing parts made from low-carbon steel － Specifications for carbonitriding heat-treatment
Chinese Name:	滚动轴承 低碳钢轴承零件碳氮共渗 热处理技术条件
Chinese Classification:	J11    Rolling bearing
Professional Classification:	JB    Professional Standard - Machinery
ICS Classification:	21.100.20 21.100.20    Rolling bearings 21.100.20
Issued by:	Ministry of Industry and Information Technology
Issued on:	2011-08-15
Implemented on:	2011-11-1
Status:	superseded
Superseded by:	JB/T 7363-2023 Rolling bearings－Carbonitriding for parts－Specifications for heat treatment
Superseded on:	2024-7-1
Superseding:	JB/T 7363-2002 Specifications for carbonitriding heat treatment of rolling bearing parts
Language:	English
File Format:	PDF
Word Count:	2000 words
Price(USD):	184.0
Delivery:	via email in 1 business day

1 Scope This standard specifies the technical requirements and inspection method for hardening depth, hardness and microstructure of the needle bearing drawn cup and cage (hereinafter referred to as “bearing parts”) made from (08, 10, 15 and 20) high-quality carbon structural steels meeting the requirements of GB/T 699-1999 and 15CrMo and 20CrMo alloy structure steels meeting the requirements of GB/T 3077-1999, after carbonitriding heat-treatment. This standard is applicable to the carbonitriding heat-treatment (effective hardening depth less than or equal to 0.30 mm) quality inspection of the bearing parts made from the above-mentioned steel types or the high-quality carbon structural steels and alloy structure steels with the equivalent performance. The carburizing heat-treatment quality inspection of the steel bearing parts with gross hardening depth less than or equal to 0.30 mm may be used by making reference. 2 Normative References The following standards contain provisions which, through reference in this text, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding correction 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 699-1999 Quality Carbon Structural Steels GB/T 3077-1999 Alloy Structure Steels GB/T 4340.1-2009 Metallic Materials-Vickers Hardness Test-Part 1: Test Method (ISO 6507-1:1997, MOD) GB/T 9451-2005 Determination of Total or Effective Thickness of Thin Surface Hardened Layers of Steel Parts JB/T 7361-2007 Rolling Bearings-Test Method for Hardness of Parts

Contents Foreword I 1 Scope 2 Normative References 3 Terms and Definitions 4 Technical Requirements 4.1 Hardening Depth 4.2 Hardness 4.3 Microstructure 4.4 Miscellaneous 5 Inspection Methods 5.1 Inspection Sample 5.2 Determination of Hardening Depth 5.3 Hardness Test 5.4 Microstructure Inspection Appendix A(Normative) Explanations on Grading Figure for Microstructure of Carbonitriding Layer Table 1 Effective or Gross Hardening Depth Table 2 Surface Hardness and Core Hardness Table A.1 Explanations on Grading Figure for Microstructure of Carbonitriding Layer