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GB/T 38749-2020: Technical requirements of controlled atmosphere heat treatment
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Technical requirements of controlled atmosphere heat treatment
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GB/T 38749-2020
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Basic data | Standard ID | GB/T 38749-2020 (GB/T38749-2020) | | Description (Translated English) | Technical requirements of controlled atmosphere heat treatment | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J36 | | Classification of International Standard | 25.200 | | Word Count Estimation | 24,222 | | Date of Issue | 2020-04-28 | | Date of Implementation | 2020-11-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 38749-2020: Technical requirements of controlled atmosphere heat treatment---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Technical requirements of controlled atmosphere heat treatment
ICS 25.200
J36
National Standards of People's Republic of China
Controlled atmosphere heat treatment technical requirements
2020-04-28 release
2020-11-01 implementation
State Administration of Market Supervision and Administration
Issued by the National Standardization Management Committee
Contents
Foreword Ⅲ
1 Scope 1
2 Normative references 1
3 Terms and definitions 2
4 Controllable atmosphere categories and applications 2
5 Equipment requirements 3
6 Process material requirements 5
7 Heat treatment process 5
8 Quality Inspection 8
9 Safety and health requirements 9
10 Environmental protection and energy saving requirements 10
Appendix A (Normative Appendix) Carburizing atmosphere uniformity test method 11
Appendix B (Normative Appendix) Effective Hardness Depth Uniformity Test Method 12
Appendix C (Normative Appendix) Test Method for Surface Carbon Content Stripping 13
Appendix D (Normative Appendix) Thin decarburization layer, carbon increase layer measurement method 14
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard is proposed and managed by the National Technical Committee for Standardization of Heat Treatment (SAC/TC75).
This standard was drafted by. Guangdong Shichuang Metal Technology Co., Ltd., Beijing Electromechanical Research Institute Co., Ltd., Jiangsu Fengdong Thermal Technology Co., Ltd.
Co., Ltd., Zhejiang Shuanghuan Transmission Machinery Co., Ltd., Jiangsu Pacific Precision Forging Technology Co., Ltd., CRRC Qishuyan Locomotive and Vehicle Worker
Art Research Institute Co., Ltd., Changzhou New District Hehai Heat Treatment Engineering Co., Ltd., Xi'an Flett Heat Treatment Co., Ltd.
The main drafters of this standard. Dong Xiaohong, Xu Yueming, Xiang Jianhua, Li Qiao, Chang Yumin, Niu Wanbin, Zhang Liping, Yang Minghua, Yin Heping, Wang Di,
Wang Guangsheng.
Controlled atmosphere heat treatment technical requirements
1 Scope
This standard specifies the controllable atmosphere category and application, equipment requirements, process material requirements, heat treatment process, quality inspection, and safety and health
Technical requirements such as hygiene, environmental protection and energy saving.
This standard applies to protective heat treatment, carburization, carbonitriding, nitriding and nitrocarburizing of controlled atmospheres.
2 Normative references
The following documents are essential for the application of this document. For dated references, only the dated version applies to this article
Pieces. For the cited documents without date, the latest version (including all amendments) applies to this document.
GB/T 224 Decarburization Depth Determination of Steel
GB/T 230.1 Rockwell hardness test of metallic materials Part 1.Test method
GB/T 338 Industrial methanol
GB/T 536 Liquid anhydrous ammonia
GB/T 3634.2 Hydrogen Part 2.Pure hydrogen, high purity hydrogen and ultra pure hydrogen
GB/T 4340.1 Metallic materials Vickers hardness test Part 1.Test method
GB/T 4341.1 Shore hardness test of metallic materials Part 1.Test method
GB/T 4842 Argon
GB/T 5959.1 Safety of electrothermal and electromagnetic treatment devices Part 1.General requirements
GB 5959.4 Safety of electric heating devices Part 4.Special requirements for resistance heating devices
GB/T 6026 Industrial acetone
GB/T 6052 Industrial liquid carbon dioxide
GB/T 6820 Industrial ethanol
GB/T 7232 Terminology of metal heat treatment process
GB/T 8121 Terminology of heat treatment process materials
GB/T 8979 Pure nitrogen, high purity nitrogen and ultra pure nitrogen
GB/T 9450 Determination and verification of the depth of carburizing and hardening layer of steel
GB/T 9451 Determination of total hardened layer depth or effective hardened layer depth on thin surface of steel parts
GB/T 9452 Determination method of effective heating zone of heat treatment furnace
GB/T 10067.1 Basic technical requirements for electrothermal and electromagnetic treatment devices Part 1.General part
GB/T 10067.4 Basic technical conditions of electric heating devices Part 4.Indirect resistance furnace
GB/T 10201 Guidelines for reasonable use of heat treatment
GB/T 11354 Depth determination and metallographic examination of steel parts
GB/T 13324 Terminology of heat treatment equipment
GB/T 15318 Energy-saving monitoring of heat treatment electric furnace
GB 15735 Safety and health requirements for metal heat treatment production process
GB 16297 Comprehensive emission standard of atmospheric pollutants
GB/T 17394.1 Metallic materials Leeb hardness test Part 1.Test method
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