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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 12173377 B1

PDFFull Text
Date of Patent:
Dec. 24, 2024

Filed:

Jan. 16, 2020

Grain-oriented electrical steel sheet and method for manufacturing same

Applicant:

Nippon Steel Corporation, Tokyo, JP;

Inventors:

Kazutoshi Takeda, Tokyo, JP;

Ichiro Tanaka, Tokyo, JP;

Tomoya Suenaga, Tokyo, JP;

Takashi Kataoka, Tokyo, JP;

Yuki Kunita, Tokyo, JP;

Assignee:

NIPPON STEEL CORPORATION, Tokyo, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Nicholas A Wang

Int. Cl.
CPC ...
C21D 9/46 (2006.01); C21D 8/12 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/60 (2006.01); C23C 22/18 (2006.01); C23C 22/20 (2006.01); C23C 22/74 (2006.01); C23C 28/04 (2006.01); C23G 1/08 (2006.01);
U.S. Cl.
CPC ...
C21D 9/46 (2013.01); C21D 8/1222 (2013.01); C21D 8/1233 (2013.01); C21D 8/1272 (2013.01); C21D 8/1283 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/60 (2013.01); C23C 22/18 (2013.01); C23C 22/20 (2013.01); C23C 22/74 (2013.01); C23C 28/04 (2013.01); C23G 1/081 (2013.01); C23G 1/083 (2013.01); C23G 1/085 (2013.01); C21D 2201/05 (2013.01);
Abstract

The grain-oriented electrical steel sheet is a grain-oriented electrical steel sheet which does not have an inorganic coating containing forsterite as a main component, including a base steel sheet having a predetermined chemical component, a silicon-containing oxide layer provided on the base steel sheet, an iron-based oxide layer provided on the silicon-containing oxide layer, and a tension-insulation coating provided on the iron-based oxide layer, having a thickness of 1 to 3 μm, and containing phosphate and colloidal silica as main components. When elemental analysis is performed from a surface of the tension-insulation coating in a sheet thickness direction by glow discharge optical emission spectrometry, predetermined requirements are satisfied.

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