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:
Jul. 31, 2012
Filed:
Apr. 24, 2009
Yaming Ji, Shanghai, CN;
Huande Sun, Shanghai, CN;
Guohua Yang, Shanghai, CN;
Yongjie Yang, Shanghai, CN;
Yunpeng Xu, Shanghai, CN;
Changguo Huang, Shanghai, CN;
Guobao LI, Shanghai, CN;
Yaming Ji, Shanghai, CN;
Huande Sun, Shanghai, CN;
Guohua Yang, Shanghai, CN;
Yongjie Yang, Shanghai, CN;
Yunpeng Xu, Shanghai, CN;
Changguo Huang, Shanghai, CN;
Guobao Li, Shanghai, CN;
Baoshan Iron & Steel Co., Ltd., Shanghai, CN;
Abstract
A method of manufacturing oriented Si steel containing Cu with high electric-magnetic property comprises: hot rolling slab; after first cold rolling, heating it to 800° C. or higher temperature and performing intermediate decarburization annealing in a protective atmosphere with P/Pof 0.50˜0.88 for 3-8 minutes, to decrease carbon content of the steel plate to less than 30 ppm; then peening and acid-pickling to remove oxide of Fe on surface and to control oxygen content to lower than 500 ppm; secondary cold rolling to final thickness and coating separation agent in water-slurry form; drying to decrease water content to lower than 1.5%; high-temperature annealing in a protective atmosphere containing hydrogen with oxidation degree (P/P) of 0.0001-0.2; finally applying a tension coating and leveling tension annealing.