GB/T 29655-2025Strip-casting neodymium iron boron alloy flakes (English PDF)

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.

This document replaces GB/T 29655-2013 "NdFeB Rapid Solidification Thin Sheet Alloy". Compared with GB/T 29655-2013, except for the structural adjustment Besides the editorial changes, the main technical changes are as follows.

a) The terms and definitions have been changed (see Chapter 3, Chapter 3 of the 2013 edition);

b) Product classification has been deleted (see 4.1 of the 2013 edition);

c) Changed the requirements for main components from "main chemical composition control accuracy" to "main component tolerance" (see 4.1, 2013 4.3 of the 2012 edition);

d) The requirements for impurity content have been changed (see 4.2, 4.4 of the 2013 edition);

e) The thickness requirements have been changed (see 4.3, 4.5 of the 2013 edition);

f) The requirements for microstructure have been changed (see 4.4, 4.6 of the 2013 edition);

g) The content of “Packaging, Marking, Transport, Storage and Accompanying Documents” has been changed (see Chapter 7, Chapter 7 of the 2013 edition);

h) The microstructure examination method has been changed (see Appendix B, 5.3.4 of the 2013 edition).

Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.

This document was proposed and coordinated by the National Rare Earth Standardization Technical Committee (SAC/TC229).

This document was drafted by: Youyan Rare Earth New Materials Co., Ltd., Baotou Yingsite Rare Earth Magnetic New Materials Co., Ltd., China Rare Earth (Micro Shandong Rare Earth New Materials Co., Ltd., Qiandong Rare Earth Group Co., Ltd., Baotou Rare Earth Research Institute, Anhui Dadixiong New Materials Co., Ltd.

Co., Ltd., Youyan Rare Earth (Rongcheng) Co., Ltd., Baotou Tianhe Magnetic Materials Technology Co., Ltd., China Northern Rare Earth (Group) High-Tech Co., Ltd.

Company, Fujian Jinlong Rare Earth Co., Ltd., Ningbo Tongchuang Strong Magnetic Materials Co., Ltd., Baotou Sanlong Rare Metal Materials Co., Ltd.

Company, Nonferrous Metals Technology and Economics Research Institute Co., Ltd.

The main drafters of this document are: Wang Zilong, Yang Yuanfei, Peng Haijun, Luo Yang, Yu Dunbo, Dong Gaihua, Li Jun, Yao Nanhong, Huang Xiulian, Liu Youhao, Yan Wenlong, Lin Xiao, Zhang Hongbin, Wu Kaiwen, Gao Haiqiang, Li Zhiqiang, Lü Ke, Huang Shulin, Huang Qingfang, Shi Chao, Chen Kan, Cao Zheng, Zhang Wei, Zhu Qing, Hou Changchun, Li Mianfu, Shen Lihan, and Wu Cenyang.

This document was first published in 2013 and this is the first revision.

1 Scope

This document specifies the technical requirements, test methods, inspection rules, packaging, marking, transportation, storage and accompanying materials of rapid solidification NdFeB alloy sheets. document.

This document applies to the inspection and production of rapidly solidified NdFeB alloy sheets for sintered NdFeB permanent magnet materials.

2 Normative references

GB/T 8170

GB/T 15676

GB 39176

3 Terms and Definitions

The terms and definitions defined in GB/T 15676 and the following apply to this document.