公开(公告)号：US20230235438A1

公开(公告)日：2023-07-27

申请号：US18010868

申请日：2021-06-18

Applicant: POSCO

Inventor： Il-Ryoung Sohn ,  Sung-Joo Kim ,  Tae-Chul Kim ,  Bong-Hwan Yoo ,  Myung-Soo Kim ,  Jong-Sang Kim ,  Sang-Tae Han ,  Kwang-Won Kim

IPC: C23C2/06 ,  C22C18/00 ,  C21D8/02 ,  C23C2/40

CPC classification number: C23C2/06 ,  C22C18/00 ,  C21D8/0226 ,  C21D8/0205 ,  C23C2/40

Abstract: Provided are a plated steel sheet and a method for manufacturing same, the plated steel sheet comprising: a base steel sheet; a Zn—Mg—Al based steel sheet plating layer provided on at least one surface of the base steel sheet; and an Fe—Al based inhibition layer provided between the base steel sheet and the Zn—Mg—Al based plating layer, wherein the plating layer comprises, in wt %: 4% or more of Mg; 2.1 times or more of Mg content and 14.2% or less of Al; 0.2% or less (including 0%) of Si; 0.1% or less (including 0%) of Sn; the remainder Zn; and unavoidable impurities.

公开(公告)号：US12270108B2

公开(公告)日：2025-04-08

申请号：US18010868

申请日：2021-06-18

Applicant: POSCO

Inventor： Il-Ryoung Sohn ,  Sung-Joo Kim ,  Tae-Chul Kim ,  Bong-Hwan Yoo ,  Myung-Soo Kim ,  Jong-Sang Kim ,  Sang-Tae Han ,  Kwang-Won Kim

IPC: C23C2/06 ,  C21D8/02 ,  C22C18/00 ,  C22C18/04 ,  C23C2/00 ,  C23C2/02 ,  C23C2/40

Abstract: The present invention relates to a plated steel sheet having excellent corrosion resistance, workability and surface quality, and at the same time, capable of reducing occurrence of liquid metal embrittlement (LME).

公开(公告)号：US20240263291A1

公开(公告)日：2024-08-08

申请号：US18567663

申请日：2022-06-10

Applicant: POSCO CO., LTD

Inventor： Sung-Joo Kim ,  Il-Ryoung Sohn ,  Tae-Chul Kim ,  Kwang-Won Kim ,  Sang-Tae Han ,  Myung-Soo Kim ,  Yong-Kyun Cho

IPC: C23C2/06 ,  C23C2/28 ,  C23C2/40

CPC classification number: C23C2/06 ,  C23C2/29 ,  C23C2/40

Abstract: One aspect of the present invention provides a plated steel sheet and a manufacturing method therefor, the plated steel sheet comprising: a base steel sheet; a Zn—Mg—Al-based plated layer provided on at least one surface of the base steel sheet; and an Fe—Al-based inhibition layer provided between the base steel sheet and the Zn—Mg—Al-based plated layer, wherein, on the surface of the Zn—Mg—Al-based plated layer, the total area fraction of an Al single phase and MgZn2 phase is 45-60%, and the area ratio of the MgZn2 phase to the Al single phase is 1.2-3.3.