IP Library › Granted Patent US 11,332,831
Granted Patent B2
US 11,332,831 · App. 15/576,944 · Granted May 17, 2022

Insulating coating for electrical steel sheet

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
C23C22/22C21D9/46C23C22/08C23C22/12C23C22/20C23C22/26C23C22/47C23C22/74H01F1/18
View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 11,332,831
App. No.
15/576,944
Granted
May 17, 2022
Kind
B2
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/m 2 or more and less than 0.2 g/m 2 .

Claims (5)

1. An insulating coating for an electrical steel sheet that is formed on a surface of a base metal of the electrical steel sheet, wherein

the insulating coating comprises a polyvalent metal phosphate of one or more elements selected from Al, Zn, Mg and Ca, and

the insulating coating has an enriched layer of a divalent metal at an interface with the surface of the base metal, wherein

an enrichment of the divalent metal contained in the enriched layer is 0.01 g/m 2 or more and less than 0.2 g/m 2 .

2. The insulating coating for an electrical steel sheet according to claim 1 , wherein the insulating coating further contains an organic resin.

Assignments (2)
CHANGE OF NAME Recorded May 14, 2019
From: NIPPON STEEL & SUMITOMO METAL CORPORATION
To: NIPPON STEEL CORPORATION
Reel/Frame 049257/0828 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Nov 27, 2017
From: YAMAZAKI, SHUICHI; TAKAHASHI, MASARU; TAKEDA, KAZUTOSHI; FUJII, HIROYASU; AKAGI, AKIRA; HORI, HIROKI
To: NIPPON STEEL & SUMITOMO METAL CORPORATION
Reel/Frame 044222/0736 →
Priority Claims (1)
JP JP2015-110055 · May 29, 2015 · national
Continuity (1)
Related Publication 20180155840A1 · Jun 7, 2018