GRAIN-ORIENTED ELECTROMAGNETIC STEEL SHEET AND METHOD FOR PRODUCING SAME

WIPO Patent Application WO/2022/203087

A1

This grain-oriented electromagnetic steel sheet is provided with a base steel sheet, a glass coating film formed on the base steel sheet, and a tension-imparted insulating coating film formed on the glass coating film, in which the base steel sheet has a plurality of linear strains that extend continuously or intermittently in a direction that intersects the rolling direction, the distance between adjacent two of the plurality of linear strains is 10 mm or less when observed in the rolling direction, there is a closure domain in a region where the strains are present, the thickness-direction length d of the closure domain as measured from the surface of the base steel sheet is 30 to 60 μm, the length w as measured in the rolling direction is 200 μm or less, and a ratio m/d, which is a ratio of the depth m from the surface of the base steel sheet at which the rolling-direction compression strain in the closure domain becomes maximum, to the aforementioned length d falls within the range of 0.30 to 0.90 exclusive.

TANAKA TOMOHITO (JP)
IWAKI MASATAKA (JP)
MORISHIGE NOBUSATO (JP)
KATAOKA TAKASHI (JP)
HAMAMURA HIDEYUKI (JP)

PCT/JP2022/015193

September 29, 2022

March 28, 2022

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NIPPON STEEL CORP (JP)

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

WO2012172624A1	2012-12-20
WO2020130645A1	2020-06-25
WO2014068962A1	2014-05-08
WO2013099272A1	2013-07-04

JP2013139590A	2013-07-18
JP2016156047A	2016-09-01
JPH11279645A	1999-10-12
JP2021053620A	2021-04-08
JP4669565B2	2011-04-13
JP4510757B2	2010-07-28
JP3361709B2	2003-01-07
JP6060988B2	2017-01-18
JP6176282B2	2017-08-09
JP6169695B2	2017-07-26
JP6245296B2	2017-12-13
JP5954421B2	2016-07-20

MATSUNUMA Yasushi et al. (JP)

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