Title:
GRAIN-ORIENTED ELECTRICAL STEEL SHEET AND PRODUCTION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2022/153605
Kind Code:
A1
Abstract:
Provided is a grain-oriented electrical steel sheet that takes advantage of a core loss reduction effect due to formation of grooves and that can effectively inhibit a reduction in magnetic flux density. This grain-oriented electrical steel sheet has predetermined linear grooves. In each of the linear grooves, the proportion of a flat part as defined in a predetermined manner is 30-90% with respect to the entire length of the linear groove, the number of portions where the flat part is continuous over a predetermined length is at least 10 per surface area of 100 cm2, and the ratio of the ten-point average roughness Rzjis with respect to the average depth D is 0.1-1.
Inventors:
ODACHI MASANORI (JP)
OMURA TAKESHI (JP)
ICHIHARA YOSHIHISA (JP)
OMURA TAKESHI (JP)
ICHIHARA YOSHIHISA (JP)
Application Number:
PCT/JP2021/034899
Publication Date:
July 21, 2022
Filing Date:
September 22, 2021
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
C21D8/12; C22C38/00; H01F1/147; C22C38/60
Domestic Patent References:
| WO2016129235A1 | 2016-08-18 | |||
| WO2016171124A1 | 2016-10-27 |
Foreign References:
| JP2016532776A | 2016-10-20 | |||
| JPH01252728A | 1989-10-09 | |||
| JP2007169762A | 2007-07-05 | |||
| JP2020514533A | 2020-05-21 | |||
| JP4719319B2 | 2011-07-06 | |||
| JP2018131680A | 2018-08-23 | |||
| JP2010168615A | 2010-08-05 |
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
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