Invention Grant
- Patent Title: Method of checking forsterite, apparatus that evaluates forsterite, and production line that manufactures steel sheet
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Application No.: US14776825Application Date: 2014-03-24
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Publication No.: US09939382B2Publication Date: 2018-04-10
- Inventor: Masayasu Nagoshi , Takako Yamashita , Yukio Usui , Shigehiro Takajo , Kazuhiro Hanazawa
- Applicant: JFE Steel Corporation
- Applicant Address: JP
- Assignee: JFE Steel Corporation
- Current Assignee: JFE Steel Corporation
- Current Assignee Address: JP
- Agency: DLA Piper LLP (US)
- Priority: JP2013-068403 20130328
- International Application: PCT/JP2014/059384 WO 20140324
- International Announcement: WO2014/157713 WO 20141002
- Main IPC: G01N21/66
- IPC: G01N21/66 ; H01F1/16 ; G01N21/88 ; G01N21/95 ; G01N23/225 ; C21D8/12
Abstract:
The location where forsterite is present is checked in a region from which light excited by an electron beam is emitted when a material containing forsterite is irradiated with an electron beam. The material is preferably a grain oriented electrical steel sheet having a forsterite layer. In addition, it is preferable that the accelerating voltage be 10 kV or more when an electron beam is radiated when the material is a grain oriented electrical steel sheet having a tension coating layer on the forsterite layer.
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