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:
Feb. 19, 2019
Filed:
Jan. 12, 2012
Fumiaki Takahashi, Tokyo, JP;
Yoshiyuki Ushigami, Tokyo, JP;
Kazumi Mizukami, Tokyo, JP;
Shuichi Nakamura, Tokyo, JP;
Norikazu Fujii, Tokyo, JP;
Norihiro Yamamoto, Tokyo, JP;
Masahide Urago, Tokyo, JP;
Fumiaki Takahashi, Tokyo, JP;
Yoshiyuki Ushigami, Tokyo, JP;
Kazumi Mizukami, Tokyo, JP;
Shuichi Nakamura, Tokyo, JP;
Norikazu Fujii, Tokyo, JP;
Norihiro Yamamoto, Tokyo, JP;
Masahide Urago, Tokyo, JP;
NIPPON STEEL & SUMITOMO METAL CORPORATION, Tokyo, JP;
Abstract
A grain-oriented electrical steel sheet being a grain-oriented electrical steel sheet containing Si of 0.8 mass % to 7 mass %, Mn of 0.05 mass % to 1 mass %, B of 0.0005 mass % to 0.0080 mass %, each content of Al, C, N, S, and Se of 0.005 mass % or less, and a balance being composed of Fe and inevitable impurities and having a glass coating film made of composite oxide mainly composed of forsterite on the steel sheet surface, in which when glow discharge optical emission spectrometry (GDS) to the surface of a secondary coating film formed on the surface of the glass coating film under a predetermined condition is performed, a peak, of B, in emission intensity having a peak position in emission intensity different from a peak position, of Mg, in emission intensity is obtained and the peak position, of B, in emission intensity from the steel sheet surface is deeper than the peak position, of Mg, in emission intensity.