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:
Apr. 26, 2022
Filed:
Dec. 20, 2017
Applicant:
Posco, Gyeongsangbuk-do, KR;
Inventors:
Oh-Yeoul Kwon, Pohang-si, KR;
Ki-Young Min, Pohang-si, KR;
Se-Min Park, Pohang-si, KR;
Jong-Tae Park, Pohang-si, KR;
Seong-Cheol Hong, Pohang-si, KR;
Assignee:
POSCO, Pohang-si, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21D 10/00 (2006.01); B23K 26/0622 (2014.01); B23K 26/364 (2014.01); B23K 26/073 (2006.01); C21D 3/04 (2006.01); C21D 6/00 (2006.01); C21D 8/12 (2006.01); C21D 9/46 (2006.01); B23K 103/04 (2006.01);
U.S. Cl.
CPC ...
C21D 10/005 (2013.01); B23K 26/0622 (2015.10); B23K 26/073 (2013.01); B23K 26/364 (2015.10); C21D 3/04 (2013.01); C21D 6/008 (2013.01); C21D 8/1233 (2013.01); C21D 8/1255 (2013.01); C21D 8/1283 (2013.01); C21D 8/1294 (2013.01); C21D 9/46 (2013.01); B23K 2103/04 (2018.08); C21D 2201/05 (2013.01);
Abstract
A method for refining magnetic domains of a grain-oriented electrical steel sheet according to an exemplary embodiment of the present invention includes: a step of preparing a grain-oriented electrical steel sheet; and a step of forming a groove by irradiating a quasi-continuous laser beam of which a duty is from 98.0 to 99.9% on a surface of the grain-oriented electrical steel sheet.