Invention Grant
- Patent Title: Method for manufacturing grain-oriented electrical steel sheet
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Application No.: US15528208Application Date: 2015-11-26
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Publication No.: US10428403B2Publication Date: 2019-10-01
- Inventor: Yasuyuki Hayakawa , Masayasu Ueno
- Applicant: JFE STEEL CORPORATION
- Applicant Address: JP Chiyoda-ku, Tokyo
- Assignee: JFE STEEL CORPORATION
- Current Assignee: JFE STEEL CORPORATION
- Current Assignee Address: JP Chiyoda-ku, Tokyo
- Agency: Kenja IP Law PC
- Priority: JP2014-240500 20141127
- International Application: PCT/JP2015/005879 WO 20151126
- International Announcement: WO2016/084378 WO 20160602
- Main IPC: C21D9/46
- IPC: C21D9/46 ; C22C38/00 ; C22C38/60 ; H01F1/16 ; C21D8/12 ; C22C38/02 ; C22C38/04 ; B21B3/02 ; C22C38/06 ; C22C38/08 ; C22C38/12 ; C22C38/16 ; C22C38/18 ; C22C38/22 ; C22C38/34 ; B21B1/22

Abstract:
Disclosed is a method for manufacturing a grain-oriented electrical steel sheet using an inhibitor-less technique, in which cold rolling includes final cold rolling with a total cold rolling reduction being set to 85% or more and a rolling reduction per pass being set to 32% or more. The final cold rolling includes one or more passes and a final pass succeeding the one or more passes and uses work rolls having a surface roughness Ra of 0.25 μm or less in at least one of the one or more passes other than the final pass. According to this method, it is possible to stably manufacture a grain-oriented electrical steel sheet exhibiting excellent magnetic properties at low cost.
Public/Granted literature
- US20170321296A1 METHOD FOR MANUFACTURING GRAIN-ORIENTED ELECTRICAL STEEL SHEET Public/Granted day:2017-11-09
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