Invention Grant
- Patent Title: Multilayer electrical steel sheet
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Application No.: US16771216Application Date: 2018-12-10
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Publication No.: US11355271B2Publication Date: 2022-06-07
- Inventor: Yoshihiko Oda , Yoshiaki Zaizen , Tatsuhiko Hiratani
- Applicant: JFE STEEL CORPORATION
- Applicant Address: JP Tokyo
- Assignee: JFE STEEL CORPORATION
- Current Assignee: JFE STEEL CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Kenja IP Law PC
- Priority: JPJP2017-238060 20171212
- International Application: PCT/JP2018/045340 WO 20181210
- International Announcement: WO2019/117089 WO 20190620
- Main IPC: B32B5/14
- IPC: B32B5/14 ; H01F1/147 ; B32B7/02 ; B32B15/01 ; C22C38/00 ; C22C38/02 ; C22C38/06 ; C22C38/12 ; C22C38/60

Abstract:
Provided is a multilayer electrical steel sheet having both low high-frequency iron loss and high magnetic flux density. The multilayer electrical steel sheet has an inner layer and surface layers provided on both sides of the inner layer, in which each of the surface layers has a Si content of 2.5 mass % to 6.0 mass %, the inner layer has a Si content of 1.5 mass % to 5.0 mass %, and the multilayer electrical steel sheet has: ΔSi of 0.5 mass % or more; ΔAl of 0.05 mass % or less; Δλ1.0/400 of 1.0×10−6 or less; a sheet thickness t of 0.03 mm to 0.3 mm; and a ratio of a total thickness of the surface layers ti to t of from 0.10 to 0.70.
Public/Granted literature
- US20210151229A1 MULTILAYER ELECTRICAL STEEL SHEET Public/Granted day:2021-05-20
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