The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 10, 2023
Filed:
Nov. 11, 2021
Hangzhou Magmax Technology Co., Ltd., Zhejiang, CN;
Hangzhou Foresee Group Holding Co., Ltd., Zhejiang, CN;
Jinghui Di, Zhejiang, CN;
Qifeng Wei, Zhejiang, CN;
Shujun Shen, Zhejiang, CN;
Shengli Jia, Zhejiang, CN;
Lichun Zhan, Zhejiang, CN;
Pengfei Ge, Zhejiang, CN;
Hangzhou Magmax Technology Co., Ltd., Hangzhou, CN;
Hangzhou Foresee Group Holding Co., Ltd., Hangzhou, CN;
Abstract
The present application relates to a preparation method of neodymium iron boron products and the neodymium iron boron product prepared by using the same. The preparation method of neodymium iron boron products includes the following steps: Step S1: preparing blank magnet; Step S2: obtaining preprocessed sheets; Step S3: surface treating; Step S4: heavy rare earth coating; Step S5: stacking: stacking a plurality of preprocessed sheets to give stacked magnets; and Step S6: grain boundary diffusion: successively subjecting the stacked magnets to a primary heat treatment for 2-40 min, a secondary heat treatment at 700-1000° C. for 4-40 h, and then tempering at 450-700° C., in which the primary heat treatment is induction heat treatment or electric spark sintering.