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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.:

US 10026533 B1

PDFFull Text
Date of Patent:
Jul. 17, 2018

Filed:

Aug. 29, 2013

Grain-oriented electrical steel sheet for iron core and method of manufacturing the same

Applicant:

Jfe Steel Corporation, Tokyo, JP;

Inventors:

Shigehiro Takajo, Kurashiki, JP;

Hiroi Yamaguchi, Kurashiki, JP;

Seiji Okabe, Kurashiki, JP;

Kazuhiro Hanazawa, Chiba, JP;

Assignee:

JFE STEEL CORPORATION, Tokyo, JP;

Attorney:

Oliff PLC

Primary Examiner:

Deborah Yee

Int. Cl.
CPC ...
C22C 38/02 (2006.01); C22C 38/06 (2006.01); C21D 8/12 (2006.01); C21D 9/46 (2006.01); H01F 1/16 (2006.01); H01F 1/147 (2006.01); C21D 1/34 (2006.01); C21D 6/00 (2006.01); C22C 38/00 (2006.01); C22C 38/60 (2006.01); C22C 38/04 (2006.01); C22C 38/08 (2006.01); C22C 38/12 (2006.01); C22C 38/16 (2006.01); C22C 38/18 (2006.01); C22C 38/20 (2006.01); C22C 38/22 (2006.01); C22C 38/34 (2006.01); C22C 38/42 (2006.01); C22C 38/44 (2006.01);
U.S. Cl.
CPC ...
H01F 1/14775 (2013.01); C21D 1/34 (2013.01); C21D 6/001 (2013.01); C21D 6/002 (2013.01); C21D 6/004 (2013.01); C21D 6/005 (2013.01); C21D 6/008 (2013.01); C21D 8/1244 (2013.01); C21D 8/1294 (2013.01); C21D 9/46 (2013.01); C22C 38/00 (2013.01); H01F 1/16 (2013.01); C21D 8/1283 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/008 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/08 (2013.01); C22C 38/12 (2013.01); C22C 38/16 (2013.01); C22C 38/18 (2013.01); C22C 38/20 (2013.01); C22C 38/22 (2013.01); C22C 38/34 (2013.01); C22C 38/42 (2013.01); C22C 38/44 (2013.01); C22C 38/60 (2013.01);
Abstract

According to the present invention, a grain-oriented electrical steel sheet for iron cores exhibiting excellent transformer iron loss properties in an excitation range from 1.5 T to 1.9 T is provided, in which a residual stress of 150 MPa or more is formed near strain regions, each extending 300 μm or less in the rolling direction and 42 μm or more in the sheet thickness direction, and the strain regions are formed periodically at intervals of 2 mm to 10 mm in the rolling direction, with reduced energy loss in transformers in operation.

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