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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 11072861 B1

PDFFull Text
Date of Patent:
Jul. 27, 2021

Filed:

Sep. 28, 2016

Grain-oriented electrical steel sheet and method for producing grain-oriented electrical steel sheet

Applicant:

Nippon Steel & Sumitomo Metal Corporation, Tokyo, JP;

Inventors:

Kazutoshi Takeda, Himeji, JP;

Fumikazu Andou, Himeji, JP;

Tomoya Suenaga, Himeji, JP;

Shuichi Yamazaki, Kimitsu, JP;

Masaru Takahashi, Nishinomiya, JP;

Assignee:

NIPPON STEEL CORPORATION, Tokyo, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Z Jim Yang

Int. Cl.
CPC ...
C23C 22/07 (2006.01); C22C 38/02 (2006.01); C22C 38/06 (2006.01); H01F 1/18 (2006.01); C22C 38/00 (2006.01); C23C 22/18 (2006.01); C23C 22/10 (2006.01); C23C 22/23 (2006.01); C21D 8/12 (2006.01); C23C 22/74 (2006.01); C23C 22/13 (2006.01); C23C 22/42 (2006.01); C04B 28/34 (2006.01); C23C 22/20 (2006.01); C23C 22/22 (2006.01); C22C 38/04 (2006.01); C23C 22/82 (2006.01); C04B 111/10 (2006.01); C04B 111/00 (2006.01);
U.S. Cl.
CPC ...
C23C 22/07 (2013.01); C04B 28/344 (2013.01); C21D 8/1283 (2013.01); C22C 38/00 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C23C 22/10 (2013.01); C23C 22/13 (2013.01); C23C 22/18 (2013.01); C23C 22/20 (2013.01); C23C 22/22 (2013.01); C23C 22/23 (2013.01); C23C 22/42 (2013.01); C23C 22/74 (2013.01); C23C 22/82 (2013.01); H01F 1/18 (2013.01); C04B 2111/00525 (2013.01); C04B 2111/1075 (2013.01); C22C 2202/02 (2013.01);
Abstract

A grain-oriented electrical steel sheet according to one embodiment of the present invention includes a steel sheet and an insulation coating, in which the insulation coating contains a first metal phosphate, which is a metal phosphate of one or two more metals selected from Al, Fe, Mg, Mn, Ni, and Zn; a second metal phosphate, which is a metal phosphate of one or two more metals selected from Co, Mo, V, W, and Zr; and colloidal silica, the insulation coating does not contain chromate, and an elution amount of phosphoric acid of the insulation coating as determined by boiling the grain-oriented electrical steel sheet in a boiled pure water for 10 minutes, then measuring an elution amount of phosphoric acid into the pure water, and dividing the amount of phosphoric acid by the area of the insulation coating of the boiled grain-oriented electrical steel sheet is 30 mg/mor less.

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