Invention Grant
- Patent Title: Grain-oriented electrical steel sheet
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Application No.: US17998356Application Date: 2021-03-04
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Publication No.: US11990261B2Publication Date: 2024-05-21
- Inventor: Yoshihisa Ichihara , Takeshi Omura , Hirotaka Inoue , Kunihiro Senda
- Applicant: JFE STEEL CORPORATION
- Applicant Address: JP Tokyo
- Assignee: JFE STEEL CORPORATION
- Current Assignee: JFE STEEL CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: KENJA IP LAW PC
- Priority: JP 20100436 2020.06.09
- International Application: PCT/JP2021/008542 2021.03.04
- International Announcement: WO2021/250953A 2021.12.16
- Date entered country: 2022-11-10
- Main IPC: H01F1/16
- IPC: H01F1/16 ; B32B3/00 ; B32B3/10 ; B32B3/26 ; B32B3/30 ; C21D8/12 ; C21D9/46 ; C22C38/00 ; C25F3/06 ; H01F1/147 ; C21D7/02 ; C22C38/02 ; C22C38/04 ; C22C38/06 ; C22C38/08 ; C22C38/60

Abstract:
Provided is a linear groove formation pattern with which both an effect of reducing the building factor and a high magnetic flux density can be obtained. In a grain-oriented electrical steel sheet having a plurality of linear grooves extending in a direction crossing a rolling direction of the steel sheet on a surface of the steel sheet, a surface of the steel sheet between the linear grooves has a recessed defect that is recessed from the surface, a volume fraction of the recessed defect in the steel sheet is 0.0025 vol % or more and 0.01 vol % or less of a steel sheet without the recessed defect, and discontinuous portions that disrupt the extension of the linear grooves are provided at a frequency of 30 or more and 200 or less per square meter of the steel sheet.
Public/Granted literature
- US20230178276A1 GRAIN-ORIENTED ELECTRICAL STEEL SHEET Public/Granted day:2023-06-08
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