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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 10793929 B1

PDFFull Text
Date of Patent:
Oct. 06, 2020

Filed:

Jul. 22, 2014

Grain-oriented electrical steel sheet and method for manufacturing same

Applicant:

Posco, Pohang-si, Gyeongsangbuk-do, KR;

Inventors:

Oh Yeoul Kwon, Pohang-si, KR;

Sun Mi Shin, Pohang-si, KR;

Chang Ho Moon, Pohang-si, KR;

Won Gul Lee, Pohang-si, KR;

Assignee:

POSCO, Pohang-si, Gyeongsangduk-do, KR;

Attorney:

Morgan, Lewis & Bockius LLP

Primary Examiner:

Jie Yang

Int. Cl.
CPC ...
C21D 9/46 (2006.01); C22C 38/02 (2006.01); B21B 1/22 (2006.01); C22C 38/00 (2006.01); C21D 8/12 (2006.01); B23K 26/362 (2014.01); B23K 26/40 (2014.01); C21D 6/00 (2006.01); C21D 8/02 (2006.01); B23K 103/04 (2006.01); C21D 10/00 (2006.01);
U.S. Cl.
CPC ...
C21D 9/46 (2013.01); B21B 1/22 (2013.01); B23K 26/362 (2013.01); B23K 26/40 (2013.01); C21D 6/008 (2013.01); C21D 8/0205 (2013.01); C21D 8/0247 (2013.01); C21D 8/0294 (2013.01); C21D 8/1294 (2013.01); C22C 38/00 (2013.01); C22C 38/02 (2013.01); B23K 2103/04 (2018.08); C21D 8/1277 (2013.01); C21D 10/00 (2013.01);
Abstract

Disclosed are a grain-oriented electrical steel sheet and a method of manufacturing the same. The method for manufacturing a grain-orientated electrical steel sheet according to an exemplary embodiment of the present invention includes: providing an electrical steel sheet before forming primary recrystallization or after forming the primary recrystallization; and forming a groove in a surface of the electrical steel sheet by radiating laser and simultaneously spraying gas onto the electrical steel sheet, in which energy density Eand a laser scanning speed Vof the radiated laser satisfy the following conditions,1.0 J/mm≤5.0 J/mm,0.0518 mm/μsec≤≤0.2 mm/μsec.

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