Title:
方向性電磁鋼板
Document Type and Number:
Japanese Patent JP7287506
Kind Code:
B2
Abstract:
To provide a grain-oriented electrical steel sheet that can achieve both sufficiently low transformer core loss and sufficiently low noise. Disclosed is a grain-oriented electrical steel sheet having a tension coating on a surface thereof and subjected to magnetic domain refining treatment by generating linear closure domains extending in a direction within 30° of a transverse direction, in which an average interval L between adjacent closure domains is 15 mm or less, a depth ratio rd of a depth of the closure domains to a sheet thickness, calculated by a predetermined formula, is 35 % or more, and a volume fraction rv of the closure domains, calculated by a predetermined formula, is 0.30 % or more and 3.0 % or less, and an area ratio rs of the closure domains, calculated by a predetermined formula, is 0.50 % or more and 4.0 % or less.
Inventors:
Kunihiro Senda
Yoshiyu Ichihara
Ken Ohmura
Yoshiyu Ichihara
Ken Ohmura
Application Number:
JP2021571481A
Publication Date:
June 06, 2023
Filing Date:
August 18, 2021
Export Citation:
Assignee:
JFE Steel Corporation
International Classes:
C22C38/00; H01F1/147
Domestic Patent References:
| JP2020105589A | ||||
| JP2016156047A |
Foreign References:
| WO2019189857A1 | ||||
| WO2014068962A1 | ||||
| WO2016063317A1 | ||||
| EP0611829A1 |
Attorney, Agent or Firm:
Kenji Sugimura
Mitsutsugu Sugimura
Keisuke Kawahara
Koji Kakinuma
Mitsutsugu Sugimura
Keisuke Kawahara
Koji Kakinuma