公开(公告)号：EP4438762A1

公开(公告)日：2024-10-02

申请号：EP22898981.0

申请日：2022-11-22

申请人： POSCO Co., Ltd

发明人： SONG, Tae-Jin ,  RYU, Joo-Hyun ,  LEE, Je-Woong

IPC分类号： C22C38/38 ,  C22C38/34 ,  C22C38/22 ,  C22C38/28 ,  C22C38/32 ,  C22C38/60 ,  C22C38/00 ,  C21D8/02 ,  C23G1/02 ,  C23C2/06

CPC分类号： C22C38/00 ,  C22C38/22 ,  C22C38/34 ,  C22C38/32 ,  C23C2/06 ,  C22C38/38 ,  C23G1/02 ,  C22C38/28 ,  C21D8/02 ,  C22C38/60

摘要： The present invention relates to a hot-rolled steel sheet that can be suitably applied to an automobile chassis structure member or the like and, more specifically, to an ultrahigh-strength hot-rolled steel sheet having excellent formability and uniform material inside the steel sheet, and a manufacturing method therefor.