Title:
ORIENTED ELECTROMAGNETIC STEEL SHEET
Document Type and Number:
WIPO Patent Application WO/2023/132251
Kind Code:
A1
Abstract:
The present invention proposes an oriented electromagnetic steel sheet in which the magnetic domain structure is controlled and iron loss is reduced, wherein an iron loss reduction effect can be maintained even when stress relief annealing is applied. The oriented electromagnetic steel sheet has, on at least one surface from among the obverse and reverse surfaces of a steel sheet having a prescribed component composition, a local region that has an orientation angle difference of 1.5° or more with respect to the surrounding crystal and that extends in a linear shape in a direction intersecting the rolling direction of the steel sheet, the local region having a volume fraction of 0.1-2.0% inclusive and a residual stress of 100 Mpa or less, and the average unevenness amount at the ferrite surface of the surface having the local region being below 5 μm.
Inventors:
YAMAGUCHI HIROI (JP)
IMAMURA TAKESHI (JP)
ICHIHARA YOSHIHISA (JP)
OMURA TAKESHI (JP)
IMAMURA TAKESHI (JP)
ICHIHARA YOSHIHISA (JP)
OMURA TAKESHI (JP)
Application Number:
PCT/JP2022/047218
Publication Date:
July 13, 2023
Filing Date:
December 21, 2022
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
C21D8/12; C22C38/00; C22C38/04; C22C38/60; H01F1/147
Domestic Patent References:
| WO2020255552A1 | 2020-12-24 | |||
| WO2022045264A1 | 2022-03-03 |
Foreign References:
| JP2012126995A | 2012-07-05 | |||
| JP2007002334A | 2007-01-11 | |||
| JP2022027234A | 2022-02-10 |
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
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