- Patent Title: Grain oriented electrical steel sheet, method for manufacturing grain oriented electrical steel sheets, method for evaluating grain oriented electrical steel sheets, and iron core
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Application No.: US15514746Application Date: 2015-09-11
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Publication No.: US10697038B2Publication Date: 2020-06-30
- Inventor: Masayasu Nagoshi , Tomohiro Matsushima , Makoto Watanabe , Shigehiro Takajo , Toshito Takamiya , Masanori Uesaka , Takashi Terashima
- Applicant: JFE STEEL CORPORATION
- Applicant Address: JP Tokyo
- Assignee: JFE STEEL CORPORATION
- Current Assignee: JFE STEEL CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Oliff PLC
- Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@4f0c9c92 com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@4bfc3ee0
- International Application: PCT/JP2015/004629 WO 20150911
- International Announcement: WO2016/047077 WO 20160331
- Main IPC: C21D9/46
- IPC: C21D9/46 ; G01N21/62 ; H01F1/18 ; C21D8/12 ; G01N23/225 ; H01F1/16 ; C22C38/02 ; G01N23/2251 ; H01F27/245 ; H02K1/02 ; H02K1/06
Abstract:
A grain oriented electrical steel sheet comprising a grain oriented electrical steel sheet having a surface and a forsterite film formed on the surface of the steel sheet, wherein a total area percentage of defective parts scattered on the forsterite film is less than 1.5% relative to a surface area of the forsterite film when viewed from above the surface, and methods for evaluating a grain oriented electrical steel sheet comprising a grain oriented electrical steel sheet having a surface and a forsterite film formed on the surface of the steel sheet.
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