GRAIN-ORIENTED ELECTRICAL STEEL SHEET, METHOD FOR FORMING INSULATIVE COATING FILM FOR GRAIN-ORIENTED ELECTRICAL STEEL SHEET, AND METHOD FOR MANUFACTURING GRAIN-ORIENTED ELECTRICAL STEEL SHEET

Title:

GRAIN-ORIENTED ELECTRICAL STEEL SHEET, METHOD FOR FORMING INSULATIVE COATING FILM FOR GRAIN-ORIENTED ELECTRICAL STEEL SHEET, AND METHOD FOR MANUFACTURING GRAIN-ORIENTED ELECTRICAL STEEL SHEET

Document Type and Number:

WIPO Patent Application WO/2020/162611

Kind Code:

A1

Abstract:

This grain-oriented electrical steel sheet comprises a base material steel sheet, an oxide layer, and a tension-imparting insulative coating film. When glow discharge optical emission spectrometry is conducted over the area ranging from the surface of the tension-imparting insulative coating film to the inside of the base material steel sheet, sputter time Fe0.5 at which the Fe light emission intensity reaches 0.5 times of the saturation value and sputter time Fe0.05 at which the Fe light emission intensity reaches 0.05 times of the saturation value satisfy 0.01<(Fe0.5 - Fe0.05) / Fe0.5<0.35. The magnetic flux density B8 of this grain-oriented electrical steel sheet in the rolling direction is 1.90 T or greater.

Inventors:

TANAKA ICHIRO (JP)
KATAOKA TAKASHI (JP)
TAKEDA KAZUTOSHI (JP)
KUBOTA MASAMITSU (JP)
TADA HIROTOSHI (JP)

Application Number:

PCT/JP2020/004890

Publication Date:

August 13, 2020

Filing Date:

February 07, 2020

Export Citation:

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Assignee:

NIPPON STEEL CORP (JP)

International Classes:

C23C22/00; C21D8/12; C21D9/46; C22C38/00; C22C38/60; H01F1/147

Domestic Patent References:

WO2011125672A1	2011-10-13
WO2016056501A1	2016-04-14

Foreign References:

JPH09209165A	1997-08-12
JP2005068525A	2005-03-17
JPH09279359A	1997-10-28
JP2019021285A	2019-02-07
JPH05311453A	1993-11-22
JP2002249880A	2002-09-06
JP2003313644A	2003-11-06
JP2001303215A	2001-10-31

Other References: