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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 12410490 B1

PDFFull Text
Date of Patent:
Sep. 09, 2025

Filed:

Jul. 15, 2020

Grain-oriented electrical steel sheet, and method for manufacturing grain-oriented electrical steel sheet

Applicant:

Nippon Steel Corporation, Tokyo, JP;

Inventor:

Masataka Iwaki, Tokyo, JP;

Assignee:

NIPPON STEEL CORPORATION, Tokyo, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Jeffrey A Vonch

Int. Cl.
CPC ...
C21D 8/12 (2006.01); C21D 9/46 (2006.01); C22C 38/00 (2006.01); C23C 22/00 (2006.01); C23C 22/08 (2006.01); C23C 22/74 (2006.01); H01F 1/147 (2006.01); H01F 1/18 (2006.01); C22C 38/08 (2006.01); C22C 38/14 (2006.01); C22C 38/16 (2006.01); C22C 38/18 (2006.01); C22C 38/60 (2006.01);
U.S. Cl.
CPC ...
C21D 8/1288 (2013.01); C21D 8/1233 (2013.01); C21D 8/1261 (2013.01); C21D 8/1272 (2013.01); C21D 8/1283 (2013.01); C21D 8/1294 (2013.01); C21D 9/46 (2013.01); C23C 22/00 (2013.01); C23C 22/08 (2013.01); C23C 22/74 (2013.01); H01F 1/147 (2013.01); H01F 1/18 (2013.01); C21D 2201/05 (2013.01); C22C 38/00 (2013.01); C22C 38/002 (2013.01); C22C 38/004 (2013.01); C22C 38/008 (2013.01); C22C 38/08 (2013.01); C22C 38/14 (2013.01); C22C 38/16 (2013.01); C22C 38/18 (2013.01); C22C 38/60 (2013.01); H01F 1/14783 (2013.01); Y10T 428/24521 (2015.01); Y10T 428/24537 (2015.01); Y10T 428/24545 (2015.01); Y10T 428/24587 (2015.01); Y10T 428/24851 (2015.01); Y10T 428/24917 (2015.01); Y10T 428/24926 (2015.01); Y10T 428/2495 (2015.01); Y10T 428/265 (2015.01); Y10T 428/266 (2015.01);
Abstract

This grain-oriented electrical steel sheet is a grain-oriented electrical steel sheet including a base steel sheet and a tension coating, in which, when an average coating thickness of a flat surface coating portion is referred to as t1 (μm), a minimum coating thickness of a groove forming surface coating portion is referred to as t2(μm), and a maximum coating thickness of the groove forming surface coating portion is referred to as t2(μm), Expressions (1) and (2) are satisfied, and when a value of 0.95 times a distance D of the tension coating along a sheet thickness direction from a bottom surface position of the groove forming surface coating portion to a bottom surface position of the flat surface coating portion is referred to as an effective depth d (μm), Expression (3) is satisfied.21≥0.4  (1)21≤3.0  (2)2/2  (3)

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