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:
May. 21, 2019
Filed:
May. 11, 2015
Jfe Steel Corporation, Chiyoda-ku, Tokyo, JP;
Ryuichi Suehiro, Kurashiki, JP;
Takashi Terashima, Kurashiki, JP;
Makoto Watanabe, Okayama, JP;
Toshito Takamiya, Kurashiki, JP;
Takeshi Imamura, Kurashiki, JP;
JFE STEEL CORPORATION, Tokyo, JP;
Abstract
A method for producing a grain-oriented electrical steel sheet by subjecting a slab of an inhibitor-less ingredient system containing C: 0.002-0.10 mass %, Si: 2.5-6.0 mass %, Mn: 0.010-0.8 mass % and extremely decreased Al, N, Se and S to hot rolling, hot band annealing, cold rolling, decarburization annealing, application of an annealing separator and finish annealing, when a certain temperature within range of 700-800° C. in a heating process of decarburization annealing is T1 and a certain temperature as a soaking temperature within a range of 820-900° C. is T2, a heating rate R1 between 500° C. and T1 is set to not less than 100° C./s and heating rate R2 between T1 and T2 is set to not more than 15° C./s, whereby grain-oriented electrical steel sheet having excellent iron loss property and coating peeling resistance is obtained in the inhibitor-less ingredient system while ensuring decarburization property even when rapid heating is performed during decarburization annealing.