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:
May. 17, 2022
Filed:
Apr. 25, 2016
Applicant:
Nippon Steel & Sumitomo Metal Corporation, Tokyo, JP;
Inventors:
Shuichi Yamazaki, Tokyo, JP;
Masaru Takahashi, Tokyo, JP;
Kazutoshi Takeda, Tokyo, JP;
Hiroyasu Fujii, Tokyo, JP;
Akira Akagi, Tokyo, JP;
Hiroki Hori, Tokyo, JP;
Assignee:
NIPPON STEEL CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C23C 22/22 (2006.01); C23C 22/12 (2006.01); C23C 22/20 (2006.01); C21D 9/46 (2006.01); H01F 1/18 (2006.01); C23C 22/74 (2006.01); C23C 22/47 (2006.01); C23C 22/26 (2006.01); C23C 22/08 (2006.01);
U.S. Cl.
CPC ...
C23C 22/22 (2013.01); C21D 9/46 (2013.01); C23C 22/08 (2013.01); C23C 22/12 (2013.01); C23C 22/20 (2013.01); C23C 22/26 (2013.01); C23C 22/47 (2013.01); C23C 22/74 (2013.01); H01F 1/18 (2013.01);
Abstract
An insulating coating for an electrical steel sheet is provided that is formed on a surface of a base metal of the electrical steel sheet and that contains a polyvalent metal phosphate of one or more elements selected from Al, Zn, Mg and Ca, and has an enriched layer of a divalent metal at an interface with the surface of the base metal. An enrichment of the divalent metal contained in the enriched layer is 0.01 g/mor more and less than 0.2 g/m.