Invention Grant
- Patent Title: Grain-oriented electrical steel sheet and method for manufacturing same
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Application No.: US14907046Application Date: 2014-07-22
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Publication No.: US10793929B2Publication Date: 2020-10-06
- Inventor: Oh Yeoul Kwon , Sun Mi Shin , Chang Ho Moon , Won Gul Lee
- Applicant: POSCO
- Applicant Address: KR Pohang-si, Gyeongsangduk-do
- Assignee: POSCO
- Current Assignee: POSCO
- Current Assignee Address: KR Pohang-si, Gyeongsangduk-do
- Agency: Morgan, Lewis & Bockius LLP
- Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@6894d441
- International Application: PCT/KR2014/006638 WO 20140722
- International Announcement: WO2015/012562 WO 20150129
- Main IPC: C21D9/46
- IPC: C21D9/46 ; C22C38/02 ; B21B1/22 ; C22C38/00 ; C21D8/12 ; B23K26/362 ; B23K26/40 ; C21D6/00 ; C21D8/02 ; B23K103/04 ; C21D10/00

Abstract:
Disclosed are a grain-oriented electrical steel sheet and a method of manufacturing the same. The method for manufacturing a grain-orientated electrical steel sheet according to an exemplary embodiment of the present invention includes: providing an electrical steel sheet before forming primary recrystallization or after forming the primary recrystallization; and forming a groove in a surface of the electrical steel sheet by radiating laser and simultaneously spraying gas onto the electrical steel sheet, in which energy density Ed and a laser scanning speed Vs of the radiated laser satisfy the following conditions, 1.0 J/mm2≤Ed≤5.0 J/mm2, 0.0518 mm/μsec≤Vs≤0.2 mm/μsec.
Public/Granted literature
- US20160177413A1 GRAIN-ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR MANUFACTURING SAME Public/Granted day:2016-06-23
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