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GB/T 42537-2023: Specification of heat treatment for super-scale steel forgings
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| GB/T 42537-2023 | English | 339 |
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Specification of heat treatment for super-scale steel forgings
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GB/T 42537-2023
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Basic data | Standard ID | GB/T 42537-2023 (GB/T42537-2023) | | Description (Translated English) | Specification of heat treatment for super-scale steel forgings | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J32 | | Classification of International Standard | 77.140.85 | | Word Count Estimation | 16,191 | | Date of Issue | 2023-05-23 | | Date of Implementation | 2023-05-23 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 42537-2023: Specification of heat treatment for super-scale steel forgings---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.
ICS 77:140:85
CCSJ32
National Standards of People's Republic of China
Specifications for heat treatment of oversized steel forgings
Released on 2023-05-23
2023-05-23 Implementation
State Administration for Market Regulation
Released by the National Standardization Management Committee
table of contents
Preface III
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Basic Requirements 1
5 heat treatment equipment 2
5:1 Heating equipment 2
5:2 Cooling equipment 2
5:3 Related tooling accessories 2
6 heat treatment process 2
6:1 Heat treatment process content 2
6:2 Rotor forging 2
6:3 Backup roll forgings 3
6:4 Container forgings 3
7 Heat treatment operation and process control 3
7:1 General requirements 3
7:2 Rotor forging 3
7:3 Backup roll forgings 4
7:4 Container forgings 4
8 Quality Control and Inspection 5
8:1 Manufacturing Outline 5
8:2 Ultrasonic testing 5
8:3 Mechanical property test 5
8:4 Testing equipment and operator requirements 5
9 Safety, health and environmental protection requirements 5
Appendix A (Informative) Chemical Composition of Commonly Used Materials for Extra Large Steel Forgings 6
Appendix B (Informative) Heat Treatment Process Parameters of Commonly Used Materials for Rotor Forgings 7
Appendix C (Informative) Heat Treatment Process Parameters of Commonly Used Materials for Extra-Large Back-up Rolls 9
Appendix D (Informative) Heat Treatment Process Parameters of Commonly Used Materials for Container Forgings 11
Reference 12
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:
Please note that some contents of this document may refer to patents: The issuing agency of this document assumes no responsibility for identifying patents:
This document is proposed by China Machinery Industry Federation:
This document is under the jurisdiction of the National Standardization Technical Committee for Large Castings and Forgings (SAC/TC506):
This document was drafted by: Erzhong (Deyang) Heavy Equipment Co:, Ltd:, China First Heavy Machinery Co:, Ltd:, Shanghai Electric Heavy Casting and Forging Co:, Ltd:
Co:, Ltd:, Taiyuan Heavy Industry Co:, Ltd:, CITIC Heavy Industry Machinery Co:, Ltd:
The main drafters of this document: Jiang Xinliang, Li Bo, Wang Xiaofang, Sun Lei, Qin Jiang, Chen Xianyi, Feng Jing, Xu Wenjin, Zhang Guoli, Zhang Zhifeng, Song Guowang,
Wang Xinchang, Guo Feng, Niu Yuwen, Shi Ruxing:
Specifications for heat treatment of oversized steel forgings
1 Scope
This document specifies the technical requirements and process methods for the heat treatment of extra-large steel forgings forged from steel ingots of more than 250 tons:
This document is applicable to steel ingots with a weight greater than or equal to 250t, forgings made of Ni2, Ni3, Ni4 series rotor materials, Cr2, Cr3, Cr4
A series of backup roller materials, 12Cr2Mo1, 12Cr2Mo1V container materials, 20MnNiMo nuclear power materials, etc: are typical representatives of energy, metallurgy,
Heat treatment of extra-large steel forgings for heavy equipment in petrochemical and other industries, see Appendix A for the chemical composition of commonly used materials for extra-large steel forgings, and other
Refer to this document for heat treatment of oversized forgings:
2 Normative references
The contents of the following documents constitute the essential provisions of this document through normative references in the text: Among them, dated references
For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to
this document:
GB/T 7232 Metal Heat Treatment Process Terminology
GB/T 13324 Terminology of heat treatment equipment
GB 15735 Metal Heat Treatment Production Process Safety and Sanitation Requirements
GB/T 16924 Quenching and Tempering of Steel Parts
GB/T 27946 Limits of Hazardous Substances in the Air of Heat Treatment Workplaces
GB/T 30822 Environmental Protection Technical Requirements for Heat Treatment
GB/T 32541 Heat Treatment Quality Control System
GB/T 37559-2019 Normalizing and annealing of large steel forgings
3 Terms and Definitions
The following terms and definitions defined in GB/T 7232, GB/T 13324 and GB/T 37559-2019 apply to this document:
3:1
Super-scale steel forgings super-scale steel forgings
A single piece is a steel free forging forged from a steel ingot of more than 250t:
4 Basic requirements
4:1 The manufacturer should have a complete quality assurance system, and should have the performance of producing forgings of similar materials and sizes or have passed the review:
Experience like forging:
4:2 Process plan should be evaluated before heat treatment: The process plan includes the process method, hoisting method, process equipment used and necessary
Assistive devices, necessary technical measures, safety measures and process parameters, etc: The process plan should generally adopt mature process parameters, allowing
The actual situation is slightly adjusted:
4:3 In order to ensure the controllability of the quality of forgings, the manufacturer should have the ability to smelt, forge and heat treat extra-large steel forgings:
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