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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 12451277 B1

PDFFull Text
Date of Patent:
Oct. 21, 2025

Filed:

Dec. 17, 2020

Non-oriented electrical steel sheet and method for manufacturing same

Applicant:

Posco, Pohang-si, KR;

Inventors:

Hyung Don Joo, Pohang-si, KR;

Il-Nam Yang, Pohang-si, KR;

Junesoo Park, Pohang-si, KR;

Chang Soo Park, Pohang-si, KR;

Assignee:

POSCO, Pohang-si, KR;

Attorney:

Morgan Lewis & Bockius LLP

Primary Examiner:

Keith D Hendricks

Assistant Examiner:

Mayela undefined Aldaz

Int. Cl.
CPC ...
H01F 1/147 (2006.01); C21D 1/06 (2006.01); C21D 6/00 (2006.01); C21D 8/12 (2006.01); C21D 9/46 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C23C 8/26 (2006.01); C23C 8/80 (2006.01); H01F 41/02 (2006.01);
U.S. Cl.
CPC ...
H01F 1/14775 (2013.01); C21D 1/06 (2013.01); C21D 6/005 (2013.01); C21D 6/008 (2013.01); C21D 8/1222 (2013.01); C21D 8/1233 (2013.01); C21D 8/1255 (2013.01); C21D 9/46 (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); C23C 8/26 (2013.01); C23C 8/80 (2013.01); H01F 41/02 (2013.01); C22C 2202/02 (2013.01);
Abstract

A non-oriented electrical steel sheet according to an embodiment of the present invention includes, in wt %, Si: 2.2 to 4.5%, Mn: 0.5% or less (excluding 0%), Al: 0.001 to 0.5%, Sn: 0.07 to 0.25%, and N: 0.0010 to 0.0090%, and the balance of Fe and inevitable impurities. A surface layer portion existing in an inner direction from a surface of the steel sheet and a central portion existing inside the surface layer portion are included, and the central portion includes N at 0.005 wt % or less, and the surface layer portion further includes N at 0.001 wt % or more compared to the central portion; and the surface layer portion has an average grain size of 60 μm or less, while the central portion has an average grain size of 70 to 300 μm.

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