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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 12119706 B1

PDFFull Text
Date of Patent:
Oct. 15, 2024

Filed:

Mar. 30, 2022

Non-oriented electrical steel sheet, production method for non-oriented electrical steel sheet, electric motor and production method for electric motor

Applicant:

Nippon Steel Corporation, Tokyo, JP;

Inventors:

Yoshiaki Natori, Tokyo, JP;

Hiroyoshi Yashiki, Tokyo, JP;

Minako Fukuchi, Tokyo, JP;

Kazutoshi Takeda, Tokyo, JP;

Assignee:

NIPPON STEEL CORPORATION, Tokyo, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Jophy S Koshy

Int. Cl.
CPC ...
C21D 9/46 (2006.01); B21B 1/22 (2006.01); C21D 6/00 (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 38/12 (2006.01); C22C 38/14 (2006.01); C22C 38/20 (2006.01); C22C 38/22 (2006.01); C22C 38/24 (2006.01); C22C 38/26 (2006.01); C22C 38/28 (2006.01); C22C 38/30 (2006.01); C22C 38/32 (2006.01); C22C 38/34 (2006.01); C22C 38/38 (2006.01); C22C 38/42 (2006.01); C22C 38/44 (2006.01); C22C 38/46 (2006.01); C22C 38/48 (2006.01); C22C 38/50 (2006.01); C22C 38/60 (2006.01); H01F 1/147 (2006.01); H02K 1/02 (2006.01); H02K 15/02 (2006.01); H02K 15/12 (2006.01); C21D 1/76 (2006.01); C22C 38/58 (2006.01);
U.S. Cl.
CPC ...
H02K 1/02 (2013.01); B21B 1/22 (2013.01); C21D 6/008 (2013.01); C21D 8/1222 (2013.01); C21D 8/1233 (2013.01); C21D 8/1244 (2013.01); C21D 8/1261 (2013.01); C21D 8/1272 (2013.01); C21D 9/46 (2013.01); C22C 38/002 (2013.01); C22C 38/004 (2013.01); C22C 38/005 (2013.01); C22C 38/008 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/12 (2013.01); C22C 38/14 (2013.01); C22C 38/20 (2013.01); C22C 38/22 (2013.01); C22C 38/24 (2013.01); C22C 38/26 (2013.01); C22C 38/28 (2013.01); C22C 38/30 (2013.01); C22C 38/32 (2013.01); C22C 38/34 (2013.01); C22C 38/38 (2013.01); C22C 38/42 (2013.01); C22C 38/44 (2013.01); C22C 38/46 (2013.01); C22C 38/48 (2013.01); C22C 38/50 (2013.01); C22C 38/60 (2013.01); H01F 1/147 (2013.01); H02K 15/02 (2013.01); H02K 15/12 (2013.01); B21B 2001/221 (2013.01); B21B 2001/225 (2013.01); C21D 1/76 (2013.01); C22C 38/58 (2013.01);
Abstract

This non-oriented electrical steel sheet contains a base material having a chemical composition including, in mass %, Si: 3.2 to 4.5%, wherein the tensile strength is 550 MPa or more, and a ratio (P/Fe)between a peak-to-peak height Feof Fe at 700 eV and a peak-to-peak height Pof P at 120 eV when crystal grain boundaries are measured through Auger electron spectroscopy is not more than twice a ratio (P/Fe)between a peak-to-peak height Feof Fe at 700 eV and a peak-to-peak height Pof P at 120 eV when the inside of crystals is measured through Auger electron spectroscopy.

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