公开(公告)号：US20240309499A1

公开(公告)日：2024-09-19

申请号：US18271787

申请日：2022-05-13

Applicant: POSCO

Inventor： Sang-Heon Kim ,  Jin-Keun Oh ,  Seong-Woo Kim ,  Sea-Woong Lee ,  Hyo-Sik Chun ,  Seul-Gi So

IPC: C22C38/38 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/28 ,  C22C38/32 ,  C23C28/02

CPC classification number: C22C38/38 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0263 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/28 ,  C22C38/32 ,  C23C28/023

Abstract: The present disclosure relates to: a plated steel sheet which is for hot forming, has excellent hydrogen embrittlement resistance, and includes an Al-based plating layer formed on the surface of a base steel sheet, wherein the average Ni content in the Al-based plating layer is 0.05 to 0.35 wt %; and a method for manufacturing same.

公开(公告)号：US12049678B2

公开(公告)日：2024-07-30

申请号：US18199740

申请日：2023-05-19

Applicant: POSCO CO., LTD

Inventor： Seong-Woo Kim ,  Jin-Keun Oh ,  Yeol-Rae Cho

IPC: C21D9/46 ,  B32B15/01 ,  C21D6/00 ,  C21D8/02 ,  C22C21/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/06 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C23C2/02 ,  C23C2/12 ,  C23C2/28 ,  C23C2/40

CPC classification number: C21D9/46 ,  B32B15/012 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0226 ,  C22C21/02 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/06 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C23C2/02 ,  C23C2/0224 ,  C23C2/024 ,  C23C2/12 ,  C23C2/28 ,  C23C2/29 ,  C23C2/40 ,  C21D2211/001 ,  C21D2211/005 ,  C21D2211/008 ,  C21D2211/009 ,  Y10T428/12757

Abstract: One aspect of the present invention relates to a plated steel sheet for hot press forming, having an excellent impact property.

公开(公告)号：US20240084429A1

公开(公告)日：2024-03-14

申请号：US17767643

申请日：2020-12-17

Applicant: POSCO

Inventor： Jin-Keun Oh ,  Seong-Woo Kim ,  Sang-Heon Kim ,  Hyo-Sik Chun

IPC: C23C2/12 ,  C21D9/46 ,  C22C21/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C23C2/26 ,  C23C2/28 ,  C23C2/40 ,  C23C28/02

CPC classification number: C23C2/12 ,  C21D9/46 ,  C22C21/02 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C23C2/261 ,  C23C2/29 ,  C23C2/40 ,  C23C28/021

Abstract: The present invention provides an aluminum-iron-plated steel sheet, having excellent mold wear resistance, for hot press forming, and a manufacturing method thereof.

公开(公告)号：US11338549B2

公开(公告)日：2022-05-24

申请号：US16617823

申请日：2018-05-31

Applicant: POSCO

Inventor： Seong-Woo Kim ,  Jin-Keun Oh ,  Yeol-Rae Cho

IPC: B32B15/01 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/28 ,  C22C38/32 ,  C23C2/12 ,  C23C2/28 ,  B21D22/02 ,  C21D9/46 ,  C22F1/00 ,  C22F1/04 ,  C21D6/00 ,  C23C2/40 ,  C23F17/00 ,  B21D35/00 ,  C23C26/00 ,  C23C28/02 ,  C23C30/00 ,  C23C28/00 ,  B32B15/18 ,  C23C2/04 ,  B32B15/04 ,  C23C2/26 ,  C23C2/06 ,  C22C30/00 ,  C22C38/14 ,  C22C38/48 ,  C22C38/40 ,  C22C38/18 ,  C22C38/42 ,  C22C38/44 ,  C22C38/08 ,  C22C38/16 ,  C22C38/24 ,  C22C21/00 ,  C22C38/38 ,  C22C38/46 ,  C22C38/20 ,  C22C38/26 ,  C22C38/22 ,  C22C38/58 ,  C22C38/12 ,  C22C38/50 ,  C22C38/54

Abstract: Provided is a steel sheet for a hot press formed member having excellent resistance to hydrogen delayed fracture, and a method for manufacturing the same. A steel sheet for a hot press formed member comprises: a base steel sheet; an aluminum alloy plating layer on a surface of the base steel sheet; and an oxide layer which is formed on a surface of the plating layer and has a thickness of 0.05 μm or more.

公开(公告)号：US11198272B2

公开(公告)日：2021-12-14

申请号：US16617862

申请日：2018-05-31

Applicant: POSCO

Inventor： Seong-Woo Kim ,  Jin-Keun Oh ,  A-Ra Cho ,  Hyeon-Jeong Shin

IPC: C21D9/46 ,  C21D6/00 ,  C23C2/12 ,  C23C2/28 ,  C23C2/40 ,  C23F17/00 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  B32B15/01 ,  C22C38/28 ,  C22C38/32 ,  B21D22/02 ,  C22F1/00 ,  C22F1/04 ,  B21D35/00 ,  C23C26/00 ,  C23C28/02 ,  C23C30/00 ,  C23C28/00 ,  B32B15/18 ,  C23C2/04 ,  B32B15/04 ,  C23C2/26 ,  C23C2/06 ,  C22C30/00 ,  C22C38/14 ,  C22C38/48 ,  C22C38/40 ,  C22C38/18 ,  C22C38/42 ,  C22C38/44 ,  C22C38/08 ,  C22C38/16 ,  C22C38/24 ,  C22C21/00 ,  C22C38/38 ,  C22C38/46 ,  C22C38/20 ,  C22C38/26 ,  C22C38/22 ,  C22C38/58 ,  C22C38/12 ,  C22C38/50 ,  C22C38/54

Abstract: Provided is a steel sheet for a hot press formed member having excellent coating adhesion, and a method for manufacturing the same. A steel sheet for hot press forming is an aluminum alloy plated steel sheet, wherein an average Fe content in a plating layer may be 40 wt % or more, and a concentration gradient of a section having a Fe content of 45 wt % to 80 wt % in the plating layer may 7 wt %/μm or less of a concentration gradient at a section having an Fe content of 45% to 80% in the plating layer in a thickness direction from a surface of the plating layer according to a result of GDS analysis.

公开(公告)号：US11167527B2

公开(公告)日：2021-11-09

申请号：US16470723

申请日：2017-12-21

Applicant: POSCO

Inventor： Jin-Keun Oh ,  Il-Ryoung Sohn ,  Seong-Woo Kim ,  Jeom-Soo Shin

IPC: B32B15/01 ,  C22C21/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/28 ,  C22C38/32 ,  C23C2/12 ,  C23C2/28 ,  C23C2/40

Abstract: Provided is an aluminum-based plated steel that is provided for vehicles by hot forming, an aluminum-based alloy plated steel manufactured using the same, and method of manufacturing thereof.

公开(公告)号：US11141953B2

公开(公告)日：2021-10-12

申请号：US16617798

申请日：2018-05-31

Applicant: POSCO

Inventor： Jin-Keun Oh ,  Seong-Woo Kim ,  Hyeon-Jeong Shin ,  A-Ra Cho

IPC: B32B15/01 ,  C22C38/32 ,  C22C38/28 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C23C2/12 ,  C23C2/28 ,  B21D22/02 ,  C21D9/46 ,  C22F1/00 ,  C22F1/04 ,  C21D6/00 ,  C23C2/40 ,  C23F17/00 ,  B21D35/00 ,  C23C26/00 ,  C23C28/02 ,  C23C30/00 ,  C23C28/00 ,  B32B15/18 ,  C23C2/04 ,  B32B15/04 ,  C23C2/26 ,  C23C2/06 ,  C22C30/00 ,  C22C38/14 ,  C22C38/48 ,  C22C38/40 ,  C22C38/18 ,  C22C38/42 ,  C22C38/44 ,  C22C38/08 ,  C22C38/16 ,  C22C38/24 ,  C22C21/00 ,  C22C38/38 ,  C22C38/46 ,  C22C38/20 ,  C22C38/26 ,  C22C38/22 ,  C22C38/58 ,  C22C38/12 ,  C22C38/50 ,  C22C38/54

Abstract: Provided is a steel sheet for a hot press formed member having excellent painting adhesion and post-painting corrosion resistance, and a method for manufacturing the same. A steel sheet for hot press forming according to one aspect of the present invention comprises a base steel sheet and a plated layer formed on a surface of the base steel sheet, wherein the ratio of an area occupied by pores to the entire area of a surface layer portion may be 10% or more in a cross section of the surface layer portion observed when the plated layer is cut in a thickness direction thereof.

公开(公告)号：US10151013B2

公开(公告)日：2018-12-11

申请号：US15250079

申请日：2016-08-29

Applicant: POSCO

Inventor： Jin-Keun Oh ,  Yeol-Rae Cho ,  Seong-Woo Kim

IPC: C21D9/46 ,  C23C2/12 ,  C22C38/28 ,  B32B15/01 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/32 ,  C23C2/28 ,  C23C2/40 ,  C22C21/02

Abstract: Provided is an HPF member having excellent bending characteristics and a hot-dip aluminum plated layer formed on a surface of a base steel sheet. The base steel sheet includes, in terms of wt %, 0.18-0.25% of C, 0.1-0.5% of Si, 0.9-1.5% of Mn, 0.03% or less of P, 0.01% or less of S, 0.01-0.05% of Al, 0.05-0.5% of Cr, 0.01-0.05% of Ti, 0.001-0.005% of B, 0.009% or less of N, the balance Fe and other impurities; a ferrite phase having a thickness within 50 μm is continuously or discontinuously formed inside a surface portion of the base steel sheet; the fraction of the surface portion occupied by the ferrite phase is 5% or less; and carbide materials having a size of 1 μm or less are scattered and distributed in the surface portion of the base steel sheet so as to occupy 90% or more of the overall carbide distribution.