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. 15, 2014
Filed:
May. 19, 2011
Isao Iwanaga, Tokyo, JP;
Yoshiyuki Ushigami, Tokyo, JP;
Norikazu Fujii, Tokyo, JP;
Norihiro Yamamoto, Tokyo, JP;
Masahide Uragoh, Tokyo, JP;
Kenichi Murakami, Tokyo, JP;
Chie Hama, Tokyo, JP;
Isao Iwanaga, Tokyo, JP;
Yoshiyuki Ushigami, Tokyo, JP;
Norikazu Fujii, Tokyo, JP;
Norihiro Yamamoto, Tokyo, JP;
Masahide Uragoh, Tokyo, JP;
Kenichi Murakami, Tokyo, JP;
Chie Hama, Tokyo, JP;
Nippon Steel & Sumitomo Metal Corporation, Tokyo, JP;
Abstract
In a method of manufacturing a grain-oriented electrical steel sheet including a nitriding treatment (step S) and adopting so-called 'low-temperature slab heating', the finish temperature of finish rolling in hot rolling (step S) is set to 950° C. or below, the cooling is started within 2 seconds after completion of the finish rolling, and a steel strip is coiled at 700° C. or below. The cooling rate over the duration from the end of finish rolling to the start of coiling is set to 10° C./sec or above. In annealing (step S) of the hot-rolled steel strip, the heating rate in the temperature range from 800° C. to 1000° C. is set to 5° C./sec or above.