GRAIN-ORIENTED ELECTROMAGNETIC STEEL SHEET AND PRODUCTION METHOD THEREFOR

Title:

GRAIN-ORIENTED ELECTROMAGNETIC STEEL SHEET AND PRODUCTION METHOD THEREFOR

Document Type and Number:

WIPO Patent Application WO/2020/116188

Kind Code:

A1

Abstract:

The present invention provides, by means of magnetic domain subdivision technology, a grain-oriented electromagnetic steel sheet that is configured to have an extremely low iron loss. The grain-oriented electromagnetic steel sheet has a plurality of magnetic domains that are obtained as a result of subdivision via a local strain introductory part, wherein regarding magnetic fluxes leaking from the local strain introductory part at a position 1.0 mm away from a surface of the steel sheet on the side of the local strain introductory part when a direct-current external magnetic field is applied to the steel sheet in the rolling direction, a value obtained by dividing the intensity level of total leakage magnetic fluxes by the intensity level of magnetic fluxes leaking because of causes other than strain, is greater than 1.2.

Inventors:

OMURA TAKESHI (JP)
ICHIHARA YOSHIHISA (JP)
SENDA KUNIHIRO (JP)
KOSHIHARA TAKAHIRO (JP)

Application Number:

PCT/JP2019/045645

Publication Date:

June 11, 2020

Filing Date:

November 21, 2019

Export Citation:

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Assignee:

JFE STEEL CORP (JP)

International Classes:

B23K15/00; C21D8/12; C22C38/00; H01F1/147; C22C38/60

Domestic Patent References:

WO2018159390A1	2018-09-07
WO2013099160A1	2013-07-04

Foreign References:

JPH0543944A	1993-02-23
JPH05279744A	1993-10-26
JPS59197525A	1984-11-09
JP2018124266A	2018-08-09
KR20180074388A	2018-07-03
KR20180074131A	2018-07-03
JPH0622179B2	1994-03-23
JP2011246782A	2011-12-08
JP2012052230A	2012-03-15
JPH11279645A	1999-10-12
JPH04202627B
JPS6249322B2	1987-10-19
JP2015004090A	2015-01-08
JPH0543944A	1993-02-23

Other References: