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.:
Date of Patent:
Sep. 23, 2025
Filed:
Apr. 16, 2021
Nippon Steel Corporation, Tokyo, JP;
Hiroyoshi Yashiki, Tokyo, JP;
Yoshiaki Natori, Tokyo, JP;
Miho Tomita, Tokyo, JP;
Kazutoshi Takeda, Tokyo, JP;
Takuya Matsumoto, Tokyo, JP;
NIPPON STEEL CORPORATION, Tokyo, JP;
Abstract
A non-oriented electrical steel sheet including a base metal that has a chemical composition including, in mass %, C: 0.0010 to 0.0040%, Si: 3.5 to 4.9%, Mn: 0.05 to 0.20%, Al: 0.05 to 0.45%, P: 0.030% or less, S: 0.0030% or less, N: 0.0030% or less, O: 0.0100 to 0.0400%, Ca: less than 0.0010%, Ti: less than 0.0050%, Nb: less than 0.0050%, Zr: less than 0.0050%, V: less than 0.0050%, Cu: less than 0.20%, Ni: less than 0.50%, Sn: 0 to 0.05%, Sb: 0 to 0.05%, and a balance: Fe and impurities, and satisfying [4.0≤Si+Al≤5.0], in which the base metal has an O content of less than 0.0050% in a region excluding a portion from a surface of the base metal to a position of 10 μm in a depth direction of the base metal.