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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 10662491 B1

PDFFull Text
Date of Patent:
May. 26, 2020

Filed:

Mar. 31, 2017

Grain-oriented electrical steel sheet

Applicant:

Nippon Steel & Sumitomo Metal Corporation, Tokyo, JP;

Inventors:

Takahito Mizumura, Tokyo, JP;

Fumiaki Takahashi, Tokyo, JP;

Masato Mizokami, Tokyo, JP;

Hisashi Mogi, Tokyo, JP;

Hideyuki Hamamura, Tokyo, JP;

Hirofumi Imai, Tokyo, JP;

Shinya Hayashi, Tokyo, JP;

Kenichi Murakami, Tokyo, JP;

Assignee:

NIPPON STEEL CORPORATION, Tokyo, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Donald J Loney

Int. Cl.
CPC ...
C21D 8/12 (2006.01); C22C 38/60 (2006.01); C22C 38/00 (2006.01); H01F 1/18 (2006.01); B32B 3/30 (2006.01); B32B 15/04 (2006.01); C21D 6/00 (2006.01); C21D 9/46 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/42 (2006.01); B32B 33/00 (2006.01); B32B 15/18 (2006.01); H01F 1/14 (2006.01);
U.S. Cl.
CPC ...
C21D 8/1222 (2013.01); B32B 3/30 (2013.01); B32B 15/04 (2013.01); C21D 6/008 (2013.01); C21D 8/12 (2013.01); C21D 8/1233 (2013.01); C21D 8/1255 (2013.01); C21D 8/1261 (2013.01); C21D 8/1272 (2013.01); C21D 9/46 (2013.01); C22C 38/00 (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 38/42 (2013.01); C22C 38/60 (2013.01); H01F 1/18 (2013.01); B32B 15/18 (2013.01); B32B 33/00 (2013.01); B32B 2307/538 (2013.01); B32B 2311/30 (2013.01); C21D 2201/05 (2013.01); C22C 2202/02 (2013.01); H01F 1/14 (2013.01); Y10T 428/12389 (2015.01); Y10T 428/12993 (2015.01); Y10T 428/24479 (2015.01); Y10T 428/24612 (2015.01);
Abstract

A grain-oriented electrical steel sheet comprising a steel sheet having a surface on which grooves, in which an extending direction crosses a rolling direction and a depth direction is parallel to a sheet thickness direction, are formed, and wherein a molten solidified substance ranging in parallel to the groove exists on both sides of the groove on the surface of the steel sheet, and a height becoming a maximum frequency in a height distribution of height data in which the surface of the steel sheet in a specific area including the groove is measured at regular intervals is set as a virtual plane, and a value of V2/V1 is more than 0.10 and less than 0.80, wherein V1 is a space volume of recess parts recessed from the virtual plane and V2 is a volume of projection parts projected from the virtual plane.

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