GB/T 40320-2021 English PDF

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GB/T 40320-2021: Measuring method for mechanical melting temperature of aluminum alloy
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 40320-2021	199	Add to Cart	3 days	Measuring method for mechanical melting temperature of aluminum alloy	Valid

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Basic data

Standard ID: GB/T 40320-2021 (GB/T40320-2021)
Description (Translated English): Measuring method for mechanical melting temperature of aluminum alloy
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H21
Word Count Estimation: 10,187
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 40320-2021: Measuring method for mechanical melting temperature of aluminum alloy

---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.
Measuring method for mechanical melting temperature of aluminum alloy ICS 77.040.10 CCSH21 National Standards of People's Republic of China Aluminium alloy mechanical melting point test method Released on 2021-08-20 2022-03-01 implementation State Administration of Market Supervision and Administration Issued by the National Standardization Management Committee

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 of Standardization Documents" Drafting. Please note that some of the contents of this document may involve patents. The issuing agency of this document is not responsible for identifying patents. This document was proposed by China Nonferrous Metals Industry Association. This document is under the jurisdiction of the National Non-ferrous Metals Standardization Technical Committee (SAC/TC243). Drafting organizations of this document. CRRC Qingdao Sifang Locomotive and Rolling Stock Co., Ltd., Shanghai Jiaotong University, Shandongnanshan Aluminum Co., Ltd. Division, Yantai Branch of the 52nd Research Institute of China Ordnance Industry, Guohe General Testing, Evaluation and Certification Co., Ltd., Guangxi Nannan Aluminum Processing Co., Ltd., Longkou Conglin Aluminum Co., Ltd., CRRC Tangshan Locomotive and Rolling Stock Co., Ltd., Northeast Light Alloy Co., Ltd. The main drafters of this document. Ding Sansan, Tian Aiqin, Sun Xiaohong, Xu Jijin, Shen Xiaoli, Yang Zeyun, Zheng Ziqin, Jin Yujia, Gao Yulong, Mo Yufei, Wang Gang, Xu Shidong, Gao Jun, Feng Chao, Yu Chun, Zhao Zhiguo, Liang Jingheng, Cai Yicheng, Liu Xijing. Aluminium alloy mechanical melting point test method

1 Scope

This document specifies the test method for the mechanical melting point of aluminum alloys. This document is applicable to the mechanical melting point test and its parameters of the welding, heat treatment, casting, forging and other hot working processes of aluminum alloy plates or profiles. Number optimization.

2 Normative references

The contents of the following documents constitute the indispensable clauses of this document through normative references in the text. Among them, dated quotations Only the version corresponding to that date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to This document. GB/T 2614 nickel-chromium-nickel-silicon thermocouple wire GB/T 8170 Numerical rounding rules and the expression and determination of limit values GB/T 16825.1-2008 Inspection of static uniaxial testing machine Part 1.Inspection and test of tensile force and (or) press force measuring system calibration GB/T 16865 Specimen and methods for tensile test of deformed aluminum, magnesium and its alloy processed products JJF1637-2017 Low-cost metal thermocouple calibration specification

3 Terms and definitions

The following terms and definitions apply to this document. 3.1 Mechanical melting temperature Determine the residual stress of the metal material after thermal cycling at different peak temperatures, and form the residual stress and peak temperature curve, and the residual stress reaches the wave The interval between the temperature at the peak and the temperature at which the residual stress drops to the trough, in ℃. Note. On the curve of residual stress and peak temperature, the temperature at the peak is the starting temperature of the mechanical melting point, and the temperature at the trough is the ending temperature of the mechanical melting point. 3.2 Thermal cycle curve thermal cycle curve The curve of temperature change with time during heating and cooling.

4 Principles of the method

The testing machine is used to simulate the thermal cycle curve at different peak temperatures during the thermal processing of aluminum alloys, and the residuals at different peak temperatures are measured. Stress, the relationship between residual stress and peak temperature is obtained, and the mechanical melting point of aluminum alloy is obtained by calculation.

5 Apparatus and equipment

5.1 Testing machine 5.1.1 The force measurement system of the testing machine should be calibrated in accordance with GB/T 16825.1-2008, and its accuracy should be level 1 or level 0.5. ......

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