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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 10704113 B1

PDFFull Text
Date of Patent:
Jul. 07, 2020

Filed:

Jan. 08, 2015

Grain oriented electrical steel sheet and production method therefor

Applicant:

Jfe Steel Corporation, Tokyo, JP;

Inventors:

Hirotaka Inoue, Tokyo, JP;

Shigehiro Takajo, Tokyo, JP;

Seiji Okabe, Tokyo, JP;

Assignee:

JFE Steel Corporation, Tokyo, JP;

Attorney:

DLA Piper LLP (US)

Primary Examiner:

Jie Yang

Int. Cl.
CPC ...
H01F 1/16 (2006.01); C21D 8/12 (2006.01); C22C 38/02 (2006.01); B23K 15/00 (2006.01); B23K 26/00 (2014.01); C22C 38/00 (2006.01); B23K 26/352 (2014.01); B23K 101/18 (2006.01); B23K 103/04 (2006.01); C22C 38/60 (2006.01); B23K 103/00 (2006.01); C22C 38/04 (2006.01); C22C 38/42 (2006.01); C22C 38/44 (2006.01);
U.S. Cl.
CPC ...
C21D 8/1294 (2013.01); B23K 15/0006 (2013.01); B23K 26/0006 (2013.01); B23K 26/352 (2015.10); C22C 38/00 (2013.01); C22C 38/02 (2013.01); H01F 1/16 (2013.01); B23K 2101/18 (2018.08); B23K 2103/04 (2018.08); B23K 2103/50 (2018.08); C22C 38/008 (2013.01); C22C 38/04 (2013.01); C22C 38/42 (2013.01); C22C 38/44 (2013.01); C22C 38/60 (2013.01);
Abstract

A magnetic domain refining treatment is performed by dividing a surface of a steel sheet into a plurality of regions in a widthwise direction, disposing a laser irradiation apparatus or an electron beam irradiation apparatus in each of the regions, and forming beam-irradiated regions through beam irradiation, wherein beams are irradiated so that a nature of a juncture between beam-irradiated regions satisfies 0≤α≤0.3×a and −1.2×a+0.02×w−0.5×α−6.5≤β≤−0.13×a−200×(1/w)+5.4 when TD spacing β at the juncture between the beam-irradiated regions is −3 to 0 mm, whereby a grain oriented electrical steel sheet having an excellent iron loss property is produced in a good productivity.

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