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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 11948711 B1

PDFFull Text
Date of Patent:
Apr. 02, 2024

Filed:

Sep. 16, 2020

Grain oriented electrical steel sheet

Applicant:

Nippon Steel Corporation, Tokyo, JP;

Inventors:

Takashi Kataoka, Tokyo, JP;

Ichiro Tanaka, Tokyo, JP;

Haruhiko Atsumi, Tokyo, JP;

Kazutoshi Takeda, Tokyo, JP;

Ryutaro Yamagata, Tokyo, JP;

Nobusato Morishige, Tokyo, JP;

Assignee:

NIPPON STEEL CORPORATION, Tokyo, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Katherine A Christy

Int. Cl.
CPC ...
C22C 38/00 (2006.01); C21D 3/04 (2006.01); C21D 6/00 (2006.01); C21D 8/00 (2006.01); C21D 8/12 (2006.01); C21D 9/46 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/20 (2006.01); C22C 38/28 (2006.01); C22C 38/34 (2006.01); H01F 1/147 (2006.01);
U.S. Cl.
CPC ...
H01F 1/14783 (2013.01); C21D 3/04 (2013.01); C21D 6/002 (2013.01); C21D 6/005 (2013.01); C21D 6/008 (2013.01); C21D 8/005 (2013.01); C21D 8/1233 (2013.01); C21D 8/1283 (2013.01); C21D 9/46 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/008 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/20 (2013.01); C22C 38/28 (2013.01); C22C 38/34 (2013.01);
Abstract

A grain oriented electrical steel sheet includes a base steel sheet, a glass film, and a tension-insulation coating. When a glow discharge emission spectroscopy is conducted from a surface of the glass film toward a depth direction, an analysis starting time Ts, a time Tat which Al shows a maximum emission intensity, an Al emission intensity F(T) at the T, a time Tat which Si shows a maximum emission intensity, and an Al emission intensity F(T) at the Tsatisfy 0.05≤F(T)/F(T)≤0.50 and 2.0≤(T−Ts)/(T−Ts)≤5.0.

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