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:
Jun. 07, 2022
Filed:
Jan. 24, 2018
Baoshan Iron & Steel Co., Ltd., Shanghai, CN;
Zipeng Zhao, Shanghai, CN;
Guobao Li, Shanghai, CN;
Yongjie Yang, Shanghai, CN;
Meihong Wu, Shanghai, CN;
Changsong Ma, Shanghai, CN;
Yaming Ji, Shanghai, CN;
Chen Ling, Shanghai, CN;
Weiyong Xie, Shanghai, CN;
Jianguo Guo, Shanghai, CN;
BAOSHAN IRON & STEEL CO., LTD., Shanghai, CN;
Abstract
A laser-scribed grain-oriented silicon steel resistant to stress-relief annealing and a manufacturing method therefor. Parallel linear grooves () are formed on one or both sides of grain-oriented silicon steel () by laser etching. The linear grooves () are perpendicular to, or at an angle to, the rolling direction of the steel plate. A maximum height of edge protrusions of the linear grooves () does not exceed 5 μm, and a maximum height of spatters in etch-free regions between adjacent linear grooves () does not exceed 5 μm, and the proportion of an area occupied by spatters in the vicinity of the linear grooves () does not exceed 5%. The steel has low manufacturing costs, and the etching effect of the finished steel is retained during a stress-relief annealing process. The steel is suitable for manufacturing of wound iron core transformers.