Invention Grant
- Patent Title: Non-oriented electrical steel sheet and method for producing the same, and motor core and method of producing the same
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Application No.: US15329938Application Date: 2015-06-01
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Publication No.: US10526673B2Publication Date: 2020-01-07
- Inventor: Tomoyuki Okubo , Tadashi Nakanishi , Yoshihiko Oda , Shinji Koseki
- 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: JP2014-155899 20140731; JP2015-031521 20150220
- International Application: PCT/JP2015/065761 WO 20150601
- International Announcement: WO2016/017263 WO 20160204
- Main IPC: C21D9/46
- IPC: C21D9/46 ; C21D9/00 ; C21D8/12 ; C22C38/00 ; C22C38/02 ; C22C38/04 ; C22C38/06 ; C22C38/60 ; C21D1/30 ; H02K1/02 ; H02K15/02

Abstract:
A non-oriented electrical steel sheet is obtained by subjecting a slab containing C: not more than 0.005 mass %, Si: 1.0-5.0 mass %, Mn: 0.04-3.0 mass %, sol. Al: not more than 0.005 mass %, P: 0.03-0.2 mass %, S: not more than 0.005 mass %, N: not more than 0.005 mass %, B: not more than 0.001 mass %, and Se: not more than 0.001 mass % and satisfying sol. Al+C+5B+5Se≤0.005 mass % to hot rolling, cold rolling and finish annealing. A sheet temperature at the outlet side of the rolling machine in at least one pass of the final cold rolling is set to a range of 100-300° C. to provide S/2M of not less than 1.0 and S/5C of not less than 1.0 when X-ray intensity ratios of {001} , {111} and {001} in a central layer in a thickness direction are S, M and C, respectively.
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