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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 10385418 B1

PDFFull Text
Date of Patent:
Aug. 20, 2019

Filed:

Apr. 19, 2016

Grain-oriented electrical steel sheet

Applicant:

Nippon Steel & Sumitomo Metal Corporation, Tokyo, JP;

Inventors:

Hisashi Mogi, Yachiyo, JP;

Fumiaki Takahashi, Kisarazu, JP;

Hideyuki Hamamura, Futtsu, JP;

Tatsuhiko Sakai, Oita, JP;

Hirofumi Imai, Kisarazu, JP;

Shunsuke Okumura, Kitakyusyu, JP;

Assignee:

NIPPON STEEL CORPORATION, Tokyo, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Catherine A Simone

Int. Cl.
CPC ...
C21D 9/46 (2006.01); H01F 1/147 (2006.01); C22C 38/00 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/34 (2006.01); C22C 38/42 (2006.01); C22C 38/60 (2006.01); H01F 1/16 (2006.01); H01F 1/18 (2006.01); C21D 3/04 (2006.01); C21D 6/00 (2006.01); C21D 8/00 (2006.01); C21D 8/12 (2006.01); B23K 26/364 (2014.01); B23K 103/04 (2006.01); B23K 26/359 (2014.01);
U.S. Cl.
CPC ...
C21D 9/46 (2013.01); B23K 26/364 (2015.10); C21D 3/04 (2013.01); C21D 6/004 (2013.01); C21D 6/005 (2013.01); C21D 6/008 (2013.01); C21D 8/005 (2013.01); C21D 8/12 (2013.01); C21D 8/1255 (2013.01); C21D 8/1261 (2013.01); C21D 8/1283 (2013.01); C22C 38/00 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/008 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/34 (2013.01); C22C 38/42 (2013.01); H01F 1/14783 (2013.01); H01F 1/16 (2013.01); H01F 1/18 (2013.01); B23K 26/359 (2015.10); B23K 2103/04 (2018.08); C22C 38/60 (2013.01); C22C 2202/02 (2013.01);
Abstract

Provided is a grain-oriented electrical steel sheet including a steel sheet having a steel sheet surface in which a groove, which extends in a direction intersecting a rolling direction and of which a groove depth direction matches a sheet thickness direction, is formed. In a case where the groove is seen on a longitudinal groove cross-section including a groove extension direction and the sheet thickness direction, an arithmetic average height Ra of a roughness curve, which constitutes a contour of a groove bottom region of the groove, is 1 μm to 3 μm, and an average length RSm of a roughness curve element, which constitutes the contour of the groove bottom region, is 10 μm to 150 μm.

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