ORIENTED ELECTROMAGNETIC STEEL SHEET AND METHOD FOR PRODUCING SAME

WIPO Patent Application WO/2023/195470

A1

The purpose of the present invention is to provide an oriented electromagnetic steel sheet with which iron loss is further improved during magnetic domain control for forming a laser groove in a cold rolling steel sheet.　The present invention is an oriented electromagnetic steel sheet satisfying the following requirements for achieving the above purpose.　That is, this oriented electromagnetic steel sheet comprises: a base material steel sheet having a plurality of grooves on a surface of a steel sheet; and a glass coating film on a surface of the base material steel sheet. The oriented electromagnetic steel sheet is characterized in that the absolute value of the angle θ formed between the longitudinal direction of the grooves and a direction perpendicular to the rolling direction of the base material steel sheet as well as to the sheet thickness direction is 0-40°, the width W of the grooves is 20-300 μm, the depth D of the grooves is 10-40 μm, the interval P of the grooves in the rolling direction is 1-30 mm, and, inside the glass coating film immediately below the recessed surface of the grooves, one or more fine particles with a long axis of 1-20 μm are present on the cross-section perpendicular to the longitudinal direction of the grooves.

JP2898792	[Title of Invention] A method for manufacturing a non-oriented electrical steel sheet having excellent magnetism.
WO/2023/090424	ROTARY ELECTRIC MACHINE, NON-ORIENTED ELECTRICAL STEEL SHEET, LAMINATED CORE, METHOD FOR MANUFACTURING ROTARY ELECTRIC MACHINE, AND METHOD FOR MANUFACTURING LAMINATED CORE
JP6432671	Manufacturing method of grain-oriented electrical steel sheet

YASUDA MASATO (JP)
HAMAMURA HIDEYUKI (JP)
MORISHIGE NOBUSATO (JP)
TAKAHASHI MASARU (JP)
SUGIYAMA KIMIHIKO (JP)

PCT/JP2023/013949

October 12, 2023

April 04, 2023

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NIPPON STEEL CORP (JP)

C21D8/12; B23K26/073; B23K26/364; C22C38/00; H01F1/147; C22C38/06

WO2019156127A1

2019-08-15

JPH05258935A	1993-10-08
JP2012077380A	2012-04-19
JP2018508647A	2018-03-29
KR20150062034A	2015-06-05

AOKI, Atsushi et al. (JP)

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