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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 12305252 B1

PDFFull Text
Date of Patent:
May. 20, 2025

Filed:

Jul. 13, 2018

Grain-oriented electrical steel sheet

Applicant:

Nippon Steel Corporation, Tokyo, JP;

Inventors:

Shinsuke Takatani, Tokyo, JP;

Masaru Takahashi, Tokyo, JP;

Kazumi Mizukami, Tokyo, JP;

Shunsuke Okumura, Tokyo, JP;

Shohji Nagano, Tokyo, JP;

Assignee:

NIPPON STEEL CORPORATION, Tokyo, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Humera N Sheikh

Assistant Examiner:

Elizabeth D Ivey

Int. Cl.
CPC ...
C21D 9/46 (2006.01); C21D 3/04 (2006.01); C21D 6/00 (2006.01); C21D 8/00 (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 38/08 (2006.01); C22C 38/16 (2006.01); C22C 38/60 (2006.01); C23C 8/26 (2006.01); H01F 1/147 (2006.01);
U.S. Cl.
CPC ...
C21D 9/46 (2013.01); C21D 3/04 (2013.01); C21D 6/001 (2013.01); C21D 6/005 (2013.01); C21D 6/008 (2013.01); C21D 8/005 (2013.01); C21D 8/1272 (2013.01); C22C 38/008 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/08 (2013.01); C22C 38/16 (2013.01); C22C 38/60 (2013.01); C23C 8/26 (2013.01); H01F 1/147 (2013.01); C22C 2202/02 (2013.01);
Abstract

An grain-oriented electrical steel sheet according to the present invention includes: a base steel sheet; an oxide layer that is formed on the base steel sheet and is formed of amorphous SiO; and a tension-insulation coating that is formed on the oxide layer. The base steel sheet includes, as a chemical composition, by mass %, C: 0.085% or less, Si: 0.80% to 7.00%, Mn: 1.00% or less, acid-soluble Al: 0.065% or less, Seq represented by S+0.406·Se: 0.050% or less, and a remainder consisting of Fe and unavoidable impurities. FWHM that is a half width of a peak of cristobalite type aluminum phosphate obtained by X-ray diffraction satisfies (i) when X-ray diffraction is performed using a Co-Kα excitation source, a half width (FWHM-Co) of a peak appearing at 2θ=24.8° is 2.5 degree or less, or (ii) when X-ray diffraction is performed using a Cu-Kα excitation source, a half width (FWHM-Cu) of a peak appearing at 2θ=21.3° is 2.1 degree or less.

Find Patent Forward Citations

Takatani, Shinsuke. (2025). Grain-oriented electrical steel sheet (U.S. Patent No. 12305252). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12305252

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