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GB/T 40790-2021 English PDF

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GB/T 40790-2021: Sintered cerium-based and cerium-rich permanent magnet materials
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GB/T 40790-2021English279 Add to Cart 3 days [Need to translate] Sintered cerium-based and cerium-rich permanent magnet materials Valid GB/T 40790-2021

PDF similar to GB/T 40790-2021


Standard similar to GB/T 40790-2021

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Basic data

Standard ID GB/T 40790-2021 (GB/T40790-2021)
Description (Translated English) Sintered cerium-based and cerium-rich permanent magnet materials
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard H65
Word Count Estimation 14,126
Issuing agency(ies) State Administration for Market Regulation, China National Standardization Administration

GB/T 40790-2021: Sintered cerium-based and cerium-rich permanent magnet materials

---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.
Sintered cerium-based and cerium-rich permanent magnet materials ICS 77.120.99 CCSH65 National Standards of People's Republic of China Sintered cerium and cerium-rich permanent magnet materials Released on 2021-10-11 2022-05-01 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 and managed by the National Rare Earth Standardization Technical Committee (SAC/TC229). Drafting organizations of this document. Central Iron and Steel Research Institute, Ningbo Founeng New Materials Co., Ltd., Shandong Shangda Rare Earth Materials Co., Ltd., Beijing Zhongke Sanhuan High-tech Co., Ltd., Anhui Dadixiong New Materials Co., Ltd., Ningbo Yunsheng Co., Ltd., and Research Rare Earth New Materials Co., Ltd., Antai Technology Co., Ltd., Ganzhou Fuerte Electronics Co., Ltd., Baotou Rare Earth Research Institute, Beijing Industry University. The main drafters of this document. Zhu Minggang, Li Wei, Liu Tao, Zou Ning, Zhou Shutai, Han Rui, Li Anhua, Shen Lihan, Feng Haibo, Jin Guoshun, Shen Guodi, Luo Yang, Zhou Lei, Yu Xi, Liu Guozheng, Yi Xiaofei, Yue Ming, Shi Xiaoning, Wang Yu, Wang Xin, Zhang Lele. Sintered cerium and cerium-rich permanent magnet materials

1 Scope

This document specifies the classification and grades, technical requirements, test methods, inspection rules and packaging, marking, Transport, storage and accompanying documents. This document is applicable to sintered cerium and cerium-rich cerium produced by the powder metallurgy process and mainly used in the fields of electronics, electric power, machinery, and medical equipment. magnet.

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 2828.1-2012 Sampling inspection procedures by attributes Part 1.Batch inspection sampling searched by acceptance quality limit (AQL) plan GB/T 3217 Permanent magnetic (hard magnetic) material magnetic test method GB/T 8170 Numerical rounding rules and the expression and determination of limit values GB/T 13560 Sintered NdFeB permanent magnet material GB/T 24270 Method for measuring temperature coefficient of magnetic properties of permanent magnet materials GB/T 29628 Guide to Permanent Magnet (Hard Magnetic) Pulse Measurement Method GB 39176-2020 Packaging, marking, transportation and storage of rare earth products

3 Terms and definitions

The following terms and definitions defined in GB/T 13560 apply to this document. 3.1 Sinteredcerium-basedpermanentmagnet Mainly Ce2Fe14B phase and 2.14.1 type (Ce,Re)-Fe-B phase, 2.14.1 type (Pr,Nd)-Fe-B equal supplementary, cerium A rare earth permanent magnet with an element content greater than that of any rare earth element other than cerium in the magnet. 3.2 Sinteredcerium-richpermanentmagnet (RE,Ce)2Fe14B (RE does not contain Ce) phase and Ce2Fe14B phase coexist, and Ce2Fe14B phase increases with the increase of cerium content, However, cerium is not the rare earth element with the largest content in the composition, and its content accounts for not less than 10% of the total rare earth element of the magnet (Ce/RE). magnet. 3.3 Sinteredcerium-basedandcerium-richpermanentmagnet The general term for sintered cerium permanent magnet and sintered cerium-rich permanent magnet.

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