GB/T 42537-2023 English PDF

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GB/T 42537-2023: Specification of heat treatment for super-scale steel forgings
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 42537-2023	339	Add to Cart	4 days	Specification of heat treatment for super-scale steel forgings	Valid

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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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