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GB/T 18683-2025 English PDF

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GB/T 18683-2025: Laser surface hardening of iron and steel parts
Status: Valid

GB/T 18683: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB/T 18683-2025English359 Add to Cart 4 days [Need to translate] Laser surface hardening of iron and steel parts Valid GB/T 18683-2025
GB/T 18683-2002English259 Add to Cart 3 days [Need to translate] Laser surface hardening of iron and steel parts Valid GB/T 18683-2002

Basic data

Standard ID GB/T 18683-2025 (GB/T18683-2025)
Description (Translated English) Laser surface hardening of iron and steel parts
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard J36
Classification of International Standard 25.200
Word Count Estimation 18,158
Date of Issue 2025-08-29
Date of Implementation 2026-03-01
Older Standard (superseded by this standard) GB/T 18683-2002
Issuing agency(ies) State Administration for Market Regulation, National Standardization Administration

GB/T 18683-2025: Laser surface hardening of iron and steel parts

---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT18683-2025
ICS 25.200 CCSJ36 National Standard of the People's Republic of China Replaces GB/T 18683-2002 Laser surface quenching of steel parts Released on August 29, 2025 Implementation on March 1, 2026 State Administration for Market Regulation The National Standardization Administration issued

Table of Contents

Preface III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Workpiece material and original state 2 5 Laser quenching equipment 3 6 Laser quenching process specifications 4 7 Quality Inspection 5 8 Safety Protection 7 9 records 7 Appendix A (Informative) Commonly used lasers and their characteristics 8 Appendix B (Informative) Commonly used light-absorbing coatings 9 Reference 10 Preface 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. Laser surface quenching of steel parts

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

The contents of the following documents constitute the essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document. GB/T 1958 Geometrical Product Specifications (GPS) Geometric Tolerance Testing and Verification GB/T 3864 Industrial Nitrogen GB/T 4340.1 Metallic materials Vickers hardness test Part 1.Test method GB/T 4842 Argon GB/T 5617 Determination of depth of hardened layer on steel surface by quenching GB/T 7232 Terminology for Metal Heat Treatment GB 7247.1 Safety of laser products Part 1.Equipment classification and requirements GB/T 9443 Penetrant testing of cast steel and cast iron GB/T 9444 Magnetic Particle Testing of Steel and Iron Castings GB/T 10320 Electrical safety of laser equipment and facilities GB/T 10610 Geometrical Product Specification (GPS) - Rules and methods for evaluating surface structure using the surface texture profile method GB 15735 Safety and hygiene requirements for metal heat treatment production processes GB/T 38762.1 Geometrical Product Specifications (GPS) Dimensional Tolerances Part 1.Linear Dimensions

3 Terms and Definitions

The terms and definitions defined in GB/T 7232 and GB/T 5617 and the following apply to this document. 3.1 Using laser as energy, the workpiece surface is heated at an extremely fast speed for self-cooling quenching. 3.2 laser power densitylaser power density The laser beam power acting on the unit area of the workpiece surface. Note. The unit is watt per square centimeter (W/cm2). 3.3 Scanning speed The distance the laser spot moves relative to the workpiece per unit time.

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