Invention Grant
- Patent Title: Grain-oriented electrical steel sheet, iron core of transformer, transformer, and method for reducing noise of transformer
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Application No.: US16474646Application Date: 2017-11-17
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Publication No.: US11894167B2Publication Date: 2024-02-06
- Inventor: Takashi Terashima , Makoto Watanabe , Toshito Takamiya , Tomoyuki Okubo
- 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: JP 16254787 2016.12.28
- International Application: PCT/JP2017/041463 2017.11.17
- International Announcement: WO2018/123339A 2018.07.05
- Date entered country: 2019-06-28
- Main IPC: C23C22/78
- IPC: C23C22/78 ; C23G1/08 ; H01F1/147 ; H01F27/34 ; H01F27/245
Abstract:
A grain-oriented electrical steel sheet having an insulating film disposed on a surface thereon. The insulating film having a chemical composition comprising Si, P, O, and at least one selected from the group consisting of Mg, Ca, Ba, Sr, Zn, Al, Mn, and Co. The insulating film has a crystallinity in a range of 20% or more, and a minimum tension provided to the steel sheet by the insulating film at a temperature in a range of 100° C. to 200° C. is 10 MPa or more.
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