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GB/T 17951-2022: Specification for magnetically hard materials
Status: Valid GB/T 17951: Evolution and historical versions
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Specification for magnetically hard materials
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GB/T 17951-2022
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| GB/T 17951-2005 | English | 919 |
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Standard specification for magnetically hard materials
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General technical conditions of hard magnetic materials
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GB/T 17951-2000
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PDF similar to GB/T 17951-2022
Basic data | Standard ID | GB/T 17951-2022 (GB/T17951-2022) | | Description (Translated English) | Specification for magnetically hard materials | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | K14 | | Word Count Estimation | 34,310 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 17951-2022: Specification for magnetically hard 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.
Specification for magnetically hard materials
ICS 29.030
CCSK14
National Standards of People's Republic of China
Replacing GB/T 17951-2005
General technical conditions of hard magnetic materials
(IEC 60404-8-1.2015,Magneticmaterials-Part 8-1.Specificationsfor
Published on 2022-03-09
2022-10-01 Implementation
State Administration for Market Regulation
Released by the National Standardization Administration
directory
Preface III
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Types of materials and their applications 1
5 Classification of magnetic properties 2
5.1 Overview 2
5.2 Main Magnetic Properties 2
5.3 Auxiliary magnetic properties 3
6 Chemical composition 3
7 Density 3
8 Grade 3
9 Delivery method and size 3
10 Test 4
10.1 Scope of inspection 4
10.2 Inspection method 4
11 Reasons for rejection 4
12 Classify material 4
12.1 Hard magnetic alloy materials 4
12.2 Hard magnetic ceramic material (hard ferrite) 7
12.3 Bonded Hard Magnetic Materials 8
13 Irreversible demagnetization characteristics 10
13.1 Overview 10
13.2 General definition of demagnetizing field strength HD 10
13.3 Simplified Definition of Demagnetization Field Strength HD 11
14 Magnetic properties, density and size 12
Appendix A (Informative) Technical differences between this document and IEC 60404-8-1.2015 and their reasons 23
Appendix B (informative) AlNiCo, CrFeCo, FeCoVCr, SmCo, NdFeB, hard ferrite and bonded SmFeN magnets
Mechanical and physical properties reference value 27
Reference 28
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"
drafted.
This document replaces GB/T 17951-2005 "General technical conditions for hard magnetic materials", compared with GB/T 17951-2005, except for editorial
In addition to the changes, the main technical changes are as follows.
--- Increased the grades and related properties of anisotropic bonded REFeN magnets (see Table 19);
--- Increase the high magnetic energy product La/Co substitute permanent magnet ferrite grades and related properties (see Table 14);
--- Added RECo552/52p and RECo568/60p two rare earth cobalt grades (see Table 16);
--- Increased the definition and mathematical determination of the demagnetizing field strength HD (see 13.2 and 13.3);
--- Changed some contents to be compatible with the test methods for hard magnetic materials GB/T 3217-2013 and GB/T 13888-2009.
This document uses the redrafting method to modify the use of IEC 60404-8-1.2015 "Magnetic Materials Part 8-1.Individual Material Specification Hard
Magnetic Materials".
Compared with IEC 60404-8-1.2015, this document has the following structural adjustments.
--- Added Appendix A;
--- Adjust Annex A of IEC 60404-8-1.2015 to Annex B.
Compared with IEC 60404-8-1.2015, this document has many technical differences. Appendix A gives the corresponding technical differences and their origins.
Because of the list.
The following editorial changes have been made to this document.
--- Change the standard name to "General Specifications for Hard Magnetic Materials".
Please note that some content of this document may be patented. The issuing agency of this document assumes no responsibility for identifying patents.
This document is proposed by China Electrical Equipment Industry Association.
This document is under the jurisdiction of the National Technical Committee for Standardization of Electrotechnical Alloys (SAC/TC228).
This document is drafted by. China Metrology Research Institute, China Metrology University, Guilin Electric Apparatus Research Institute Co., Ltd., Youyan Rare Earth New
Materials Co., Ltd., Ningbo Zhaobao Magnetic Industry Co., Ltd., Ningbo Yunsheng Co., Ltd., Tianjin Sanhuan Lexi New Materials Co., Ltd., Zhejiang
Jiangxinsheng Permanent Magnet Technology Co., Ltd., Fujian Changting Zhuoer Technology Co., Ltd., Hangzhou Permanent Magnet Group Co., Ltd., Ganzhou Metrology Inspection
Research on Quality Supervision and Inspection of Rare Earth Products by Ding Testing Institute (National Tungsten and Rare Earth Industry Measurement and Testing Center), Henan University of Science and Technology, and Inner Mongolia Autonomous Region
Institute, Ningbo Shengshida Magnetic Industry Co., Ltd., Ningbo Ninggang Permanent Magnet Material Co., Ltd., Zhejiang Zhonghang New Material Technology Co., Ltd., Ningbo Coco Magnetics
Industry Co., Ltd., Ningbo Funeng New Materials Co., Ltd., Ningbo Jinji Strong Magnetic Co., Ltd., Ningbo Songke Magnetic Materials Co., Ltd.,
Shenzhen Dongsheng Magnetic Industry Co., Ltd., Ningbo Jinke Magnetic Industry Co., Ltd., Ningbo Xinlin Magnetic Industry Co., Ltd., Youyan Rare Earth (Rongcheng) Co., Ltd.,
Chongqing University of Science and Technology, Ningbo Magnetic Materials Chamber of Commerce.
The main drafters of this document. He Jian, Ge Hongliang, Wu Qiong, Yu Nengjun, Xie Yongzhong, Yan Wenlong, Lin Jianqiang, Shen Guodi, Liu Wuli, Bao Jinsheng,
Tang Guocai, Wang Guoxiong, Jia Guiyuan, Zeng Jiping, An Shizhong, Zhang Donghong, Ren Changfeng, Li Wenjun, Zhou Jianbin, Xu Jiacheng, Feng Wei, Zou Yuqin,
Hu Yuanhu, Ni Haohan, Zheng Xidong, Zhou Gaofeng, Li Guoqiang, Ma Yuehua, Ma Yilong, Li Chunhong, Sun Jianchun, Wu Wenjie, Cui Defeng, Zhao Haorong,
Cheng Junfeng and Guo Yan.
The previous versions of this document and its superseded documents are as follows.
---First published in.2000 as GB/T 17951-2000, first revised in.2005;
---This is the second revision.
General technical conditions of hard magnetic materials
1 Scope
This document specifies minimum values and dimensional tolerances for the main magnetic properties of hard magnetic materials (also known as permanent magnetic materials). To provide some reference information,
This document also gives density values and chemical composition ranges for materials.
This document applies to the inspection of hard magnetic materials.
Note. Table B.1 in Appendix B gives additional mechanical and physical property values related to magnetic materials for reference and comparison.
2 Normative references
The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations
documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to
this document.
GB/T 2900.60-2002 Electrotechnical term Electromagnetics (eqvIEC 60050-121.1998)
GB/T 2900.83-2008 Electrical terminology electrical and magnetic devices (IEC 60050-151.2001, IDT)
GB/T 3217 Magnetic Test Methods for Permanent Magnetic (Hard Magnetic) Materials (GB/T 3217-2013, IEC 60404-5.1993, MOD)
GB/T 9637-2001 Electrotechnical Terminology Magnetic Materials and Components (eqvIEC 60050-221.1990)
GB/T 13888 Method for measuring the coercive force of magnetic materials in an open magnetic circuit (GB/T 13888-2009, IEC 60404-7.1982,
IDT)
GB/T 29628 Guidelines for Measurement Methods of Permanent Magnet (Hard Magnetic) Pulses (GB/T 29628-2013, IEC TR62331.2005, NEQ)
3 Terms and Definitions
Terms and definitions defined in GB/T 2900.60-2002, GB/T 2900.83-2008 and GB/T 9637-2001 apply to this
document.
4 Types of materials and their applications
Hard magnetic materials are divided into R type (hard magnetic alloy material), S type (hard magnetic ceramic material) and U type (bonded hard magnetic material).
Hard magnetic materials have a magnetic polarization coercivity greater than 1kA/m, and can provide a material-dependent magnetic field after magnetization saturation.
or dynamic magnetic circuit applications.
Hard magnetic materials are very common in life. They are based on electromagnetic principles and are used in measuring devices, engines, generators, and loudspeakers.
realize the function of coupling, modulation or regulation in office equipment, computer hardware, entertainment appliances, radio communications, household appliances and medical equipment
is also essential. At the same time, hard magnetic materials can also be used for driving electric vehicles [including hybrid electric vehicles (HEV), electric vehicles (EV)]
machine, or used in jigs and clamps, templates in mechanical engineering.
In GB/T 21219-2007, the possible and typical applications of these hard magnetic materials that can be supplied in large quantities are described in more detail.
narrative.
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