Invention Grant
- Patent Title: Grain-oriented electrical steel sheet and producing method therefor
- Patent Title (中): 晶粒取向电工钢板及其制造方法
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Application No.: US12736257Application Date: 2009-03-30
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Publication No.: US08268097B2Publication Date: 2012-09-18
- Inventor: Fumiaki Takahashi , Kazutoshi Takeda , Hiroyasu Fujii , Shuichi Yamazaki , Yoshiaki Natori
- Applicant: Fumiaki Takahashi , Kazutoshi Takeda , Hiroyasu Fujii , Shuichi Yamazaki , Yoshiaki Natori
- Applicant Address: JP Tokyo
- Assignee: Nippon Steel Corporation
- Current Assignee: Nippon Steel Corporation
- Current Assignee Address: JP Tokyo
- Agency: Kenyon & Kenyon LLP
- Priority: JP2008-091051 20080331
- International Application: PCT/JP2009/056573 WO 20090330
- International Announcement: WO2009/123156 WO 20091008
- Main IPC: H01F1/18
- IPC: H01F1/18

Abstract:
A grain-oriented electrical steel sheet has a tension film that does not include chromium. In the present invention, the tension film, including a phosphate and silica as constituents, includes a manganese compound and a potassium compound. The mole ratio K/Mn of potassium to manganese in the film is set to a certain range. The film can be produced by preparing a coating solution by adding a compound, which includes the phosphate and the silica and also includes the potassium and the manganese, and applying the coating solution on a grain-oriented electrical steel sheet after final annealing is completed, followed by drying and baking.
Public/Granted literature
- US20110039114A1 GRAIN-ORIENTED ELECTRICAL STEEL SHEET AND PRODUCING METHOD THEREFOR Public/Granted day:2011-02-17
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