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:
Feb. 28, 2017
Filed:
Jul. 29, 2011
Applicants:
Takeshi Kubota, Tokyo, JP;
Masahiro Fujikura, Tokyo, JP;
Inventors:
Takeshi Kubota, Tokyo, JP;
Masahiro Fujikura, Tokyo, JP;
Assignee:
Nippon Steel & Sumitomo Metal Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B21B 15/00 (2006.01); C21D 8/12 (2006.01); C21D 6/00 (2006.01); C21D 9/46 (2006.01); C22C 38/00 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/16 (2006.01); C22C 38/18 (2006.01); C22C 38/34 (2006.01); H01F 1/16 (2006.01); C22C 38/02 (2006.01);
U.S. Cl.
CPC ...
B21B 15/00 (2013.01); C21D 8/1222 (2013.01); C21D 8/1233 (2013.01); C21D 8/1266 (2013.01); C21D 8/1272 (2013.01); C21D 9/46 (2013.01); C22C 38/002 (2013.01); C22C 38/004 (2013.01); C22C 38/008 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/16 (2013.01); C22C 38/18 (2013.01); C22C 38/34 (2013.01); H01F 1/16 (2013.01); C21D 6/008 (2013.01); C21D 2201/05 (2013.01);
Abstract
A steel having a predetermined composition is hot-rolled so as to form a steel strip, the steel strip is subjected to first cold-rolling, the steel strip is subjected to intermediate annealing, the steel strip is subjected to second cold-rolling, and the steel strip is subjected to finish annealing. A finish temperature in the hot-rolling is 900° C. or less, annealing is not performed between the hot-rolling and the first cold-rolling, and a rolling reduction in the second cold-rolling is not less than 40% nor more than 85%.