Invention Application
- Patent Title: METHOD OF PRODUCING HOT-ROLLED STEEL SHEET FOR NON-ORIENTED ELECTRICAL STEEL SHEET, METHOD OF PRODUCING NON-ORIENTED ELECTRICAL STEEL SHEET, AND HOT-ROLLED STEEL SHEET FOR NON-ORIENTED ELECTRICAL STEEL SHEET
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Application No.: US18728216Application Date: 2023-01-24
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Publication No.: US20250101541A1Publication Date: 2025-03-27
- Inventor: Tomoyuki OKUBO , Hayato SAITO , Ryuichi SUEHIRO , Masayasu UENO , Shinya YAMAGUCHI
- 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
- Priority: JP2022-014498 20220201
- International Application: PCT/JP2023/002156 WO 20230124
- Main IPC: C21D9/46
- IPC: C21D9/46 ; B22D11/00 ; C21D6/00 ; C21D8/12 ; C22C38/00 ; C22C38/02 ; C22C38/04 ; C22C38/06 ; C22C38/42 ; C22C38/44 ; C22C38/46 ; C22C38/48 ; C22C38/50 ; C22C38/52 ; C22C38/54 ; C22C38/58 ; C22C38/60 ; H01F1/147

Abstract:
Ridging caused when handling steel containing a large amount of alloying elements such as Si and Al in a low-speed hot rolling process is suppressed. A method of producing a hot-rolled steel sheet for a non-oriented electrical steel sheet comprises: producing a steel slab having a certain chemical composition and a thickness of 50 mm to 200 mm by continuous casting; conveying the steel slab to a hot rolling line while maintaining a surface temperature of the steel slab at 800° C. or more; and performing hot rolling in which the steel slab is sequentially subjected to rough rolling, reheating treatment, and finish rolling in the hot rolling line to obtain a hot-rolled steel sheet, wherein the hot rolling is performed under specific conditions.
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