Title:
GRAIN-ORIENTED ELECTROMAGNETIC STEEL SHEET AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2023/112421
Kind Code:
A1
Abstract:
The present invention provides: a grain-oriented electromagnetic steel sheet which has excellent film adhesion; and a method for producing this grain-oriented electromagnetic steel sheet. A grain-oriented electromagnetic steel sheet according to the present invention sequentially has a forsterite film and an insulating film from the surface side of the steel sheet; and the frequency of occurrence (cracks/mm) of cracks that penetrate the insulating film in a region within 100 µm from the edge of the grain-oriented electromagnetic steel sheet in the sheet width direction toward the center in the sheet width direction is not more than 3.0 times the frequency of occurrence (cracks/mm) of cracks that penetrate the insulating film in a region more than 100 µm but not more than 500 µm from the edge toward the center in the sheet width direction.
Inventors:
OMURA TAKESHI (JP)
ICHIHARA YOSHIHISA (JP)
YOSHIZAKI SOUICHIRO (JP)
ICHIHARA YOSHIHISA (JP)
YOSHIZAKI SOUICHIRO (JP)
Application Number:
PCT/JP2022/035418
Publication Date:
June 22, 2023
Filing Date:
September 22, 2022
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
C21D8/12; C22C38/00; H01F1/147; C22C38/60
Domestic Patent References:
| WO2019106976A1 | 2019-06-06 | |||
| WO2018079845A1 | 2018-05-03 |
Foreign References:
| JP2018168436A | 2018-11-01 | |||
| KR20130010224A | 2013-01-28 |
Attorney, Agent or Firm:
KUMASAKA Akira et al. (JP)
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