公开(公告)号：US20240410037A1

公开(公告)日：2024-12-12

申请号：US18698972

申请日：2022-11-10

Applicant: JFE STEEL CORPORATION

Inventor： Ryuichi SUEHIRO ,  Tomoyuki OKUBO ,  Masayasu UENO ,  Shinya YAMAGUCHI ,  Shigehiro MARUYAMA

IPC: C22C38/02 ,  C21D6/00 ,  C21D8/12 ,  C21D9/46 ,  C22C38/04 ,  C22C38/06

Abstract: In a process using a thin slab, ridging is suppressed. A method of producing a hot-rolled steel sheet for a non-oriented electrical steel sheet includes: continuous casting producing a steel slab having a defined chemical composition and a thickness of 50 mm to 200 mm; transferring the steel slab to a furnace while maintaining a surface temperature of the steel slab at 800° C. or more; holding the steel slab in the furnace under conditions including a hold temperature of 1100° C. to 1300° C. and a hold time of 60 s or more; and a hot rolling process under conditions of (1) and (2) of rough rolling, reheating treatment, and finish rolling in sequence to obtain a hot-rolled steel sheet: (1) total rolling reduction of the rough rolling: 80% or more, and (2) total rolling reduction of the finish rolling: 80% or more.