公开(公告)号：US20240336987A1

公开(公告)日：2024-10-10

申请号：US18293195

申请日：2022-11-25

Applicant: POSCO Co., Ltd

Inventor： Hak-Cheol LEE

IPC: C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14

CPC classification number: C21D8/0226 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C21D2211/001 ,  C21D2211/002 ,  C22C2202/00

Abstract: The present invention relates to a steel plate for use in ships and the like, which has excellent toughness in a heat-affected zone (HAZ), even when a steel material having high strength and high ductility is welded with a certain amount of heat input or more, and to a method for manufacturing same.