GB/T 18683-2025Laser surface hardening of iron and steel parts (English PDF)

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1: Structure and drafting rules for standardization documents" Drafting.

This document replaces GB/T 18683-2002 "Laser surface hardening of steel parts". Compared with GB/T 18683-2002, except for the structural adjustment Besides the editorial changes, the main technical changes are as follows.

a) Added the terms "overlap ratio", "case quenching hardened layer depth", "case quenching total hardened layer depth", and "case quenching hardened layer width" and their definitions (see 3.4 to 3.7); the terms “phase transformation hardening zone”, “heat affected zone”, “minimum surface hardness”, “hardness limit”, and “ Effective hardened layer depth, effective hardened layer width, total hardened layer depth, total hardened layer width and their definitions (see 2002 edition 3.4~3.11);

b) The material grades of commonly used laser quenching workpieces have been changed (see Table 1, Appendix A of the 2002 edition);

c) The requirements for laser hardening equipment have been changed (see 5.1 to 5.7, 5.1 and 5.1.1 to 5.1.4 of the 2002 edition);

d) Added process formulation principle elements and process parameter determination methods, changed "overlap coefficient" to "overlap rate", and changed the corresponding Calculation formula (see 6.1.2, 6.2, 6.4, 6.5, 5.3.1, 5.3.3, 5.3.4 of the 2002 edition);

e) The workpiece surface pretreatment method has been changed (see 6.3, 5.2 of the 2002 edition);

f) The quality inspection items and requirements have been changed (see 7.1 to 7.7, 6.1, 6.3 to 6.6 of the 2002 edition), and the reference to “surface roughness” has been deleted.

and “hardness distribution” test (see 6.2, 6.3.2 of the 2002 edition), and deleted “microhardness measurement method” and “microstructure measurement method”.

(See 6.5.1, 6.5.2, 6.6.1, 6.6.2 of the 2002 edition);

g) Deleted "Arbitration Method" and related content (see 6.7 of the 2002 edition);

h) The content related to “records” has been modified (see Chapter 9, 5.4 of the 2002 edition).

Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.

This document is proposed and coordinated by the National Technical Committee for Standardization of Heat Treatment (SAC/TC75).

This document was drafted by: Zhejiang University of Technology, China Machinery Engineering Corporation Beijing Electromechanical Research Institute Co., Ltd., CRRC Industrial Research Institute (Qingdao) Co., Ltd., Wenzhou University, Wuhan Institute of Materials Protection Co., Ltd. of China Machinery Engineering Corporation, Jiangsu Fengdong Heat Treatment and Surface Modification Engineering Technology Research Co., Ltd., China University of Petroleum (East China), Nanjing Huirui Optoelectronics Technology Co., Ltd., Southwest Jiaotong University, Suzhou Thermal Engineering Research Institute Co., Ltd., Zhongte Tailai Mould Technology Co., Ltd., Hunan Southern Aerospace High Precision Transmission Co., Ltd., CCCC Shanghai Navigation Bureau Co., Ltd., Jinan Heavy Industry Group Co., Ltd., Sichuan Yuanfang High-tech Equipment Parts Co., Ltd., Zhejiang Tianma Bearing Group Co., Ltd., Jiangsu Shen Shield Engineering Machinery Co., Ltd. and Zhejiang Zhongshu Laser Equipment Co., Ltd.

The main drafters of this document are: Yao Jianhua, Xu Yueming, Li Qiao, Wang Cong, Chen Xizhang, Shi Yousen, Zhang Qunli, Chen Zhijun, Pan Lin, Li Meiyan, Qi Huan, Wang Wenjian, Dong Haitao, Lu Weiwei, Qiu Rongchun, Yin Jiachun, Meng Xiaoning, Zhang Yuchuan, Ma Weiliang, Huang Liwen, Zhang Weifeng, Zhang Yinlin, Han Bin, Wu Zhiwei, Ding Haohao, Chen Chen, Zhou Zhicheng, Xin Long, and Chen Yi.

This document was first published in 2002 and this is the first revision.

1 Scope

This document specifies the workpiece materials and original state, laser quenching equipment, process specifications, quality inspection, safety protection for laser surface quenching and records.

This document applies to the surface hardening of steel parts using laser.

2 Normative references

GB/T 1958

GB/T 3864

GB/T 4340.1

GB/T 4842

GB/T 5617

GB/T 7232

GB 7247.1

GB/T 9443

GB/T 9444

GB/T 10320

GB/T 10610

GB 15735

GB/T 38762.1

3 Terms and Definitions

The terms and definitions defined in GB/T 7232 and GB/T 5617 and the following apply to this document.