公开(公告)号：US20240198633A1

公开(公告)日：2024-06-20

申请号：US18586317

申请日：2024-02-23

Applicant: POSCO CO, LTD

Inventor： Jin-Keun OH ,  Seong-Woo KIM ,  Hyeon-Jeong SHIN ,  A-Ra CHO

IPC: B32B15/01 ,  B21D22/02 ,  B21D35/00 ,  B21D37/16 ,  B32B5/18 ,  B32B5/20 ,  B32B15/04 ,  B32B15/18 ,  C21D1/26 ,  C21D6/00 ,  C21D9/46 ,  C21D9/52 ,  C22C21/00 ,  C22C30/00 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C22C38/40 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  C22C38/58 ,  C22C38/60 ,  C22F1/00 ,  C22F1/04 ,  C23C2/04 ,  C23C2/06 ,  C23C2/12 ,  C23C2/26 ,  C23C2/28 ,  C23C2/40 ,  C23C26/00 ,  C23C28/00 ,  C23C28/02 ,  C23C30/00 ,  C23F17/00

CPC classification number: B32B15/012 ,  B21D22/02 ,  B21D22/022 ,  B21D35/00 ,  B21D35/005 ,  B21D37/16 ,  B32B5/18 ,  B32B5/20 ,  B32B15/01 ,  B32B15/011 ,  B32B15/013 ,  B32B15/04 ,  B32B15/043 ,  B32B15/18 ,  C21D1/26 ,  C21D6/005 ,  C21D6/008 ,  C21D9/46 ,  C21D9/52 ,  C22C21/00 ,  C22C30/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C22C38/40 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  C22C38/58 ,  C22C38/60 ,  C22F1/002 ,  C22F1/04 ,  C23C2/04 ,  C23C2/06 ,  C23C2/12 ,  C23C2/26 ,  C23C2/28 ,  C23C2/29 ,  C23C2/40 ,  C23C26/00 ,  C23C28/023 ,  C23C28/321 ,  C23C28/322 ,  C23C30/00 ,  C23C30/005 ,  C23F17/00 ,  Y10T428/12479 ,  Y10T428/12757 ,  Y10T428/12799 ,  Y10T428/12951 ,  Y10T428/12958 ,  Y10T428/12972 ,  Y10T428/12979 ,  Y10T428/12993

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：US20250010579A1

公开(公告)日：2025-01-09

申请号：US18891742

申请日：2024-09-20

Applicant: POSCO Co., Ltd.

Inventor： Seong-Woo KIM ,  Jin-Keun OH ,  A-Ra CHO ,  Hyeon-Jeong SHIN

IPC: B32B15/01 ,  B21D22/02 ,  B21D35/00 ,  B21D37/16 ,  B32B5/18 ,  B32B5/20 ,  B32B15/04 ,  B32B15/18 ,  C21D1/26 ,  C21D6/00 ,  C21D9/46 ,  C21D9/52 ,  C22C21/00 ,  C22C30/00 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C22C38/40 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  C22C38/58 ,  C22C38/60 ,  C22F1/00 ,  C22F1/04 ,  C23C2/04 ,  C23C2/06 ,  C23C2/12 ,  C23C2/26 ,  C23C2/28 ,  C23C2/40 ,  C23C26/00 ,  C23C28/00 ,  C23C28/02 ,  C23C30/00 ,  C23F17/00

Abstract: The present invention relates to a hot press formed member. A hot press formed member according to one aspect of the present invention comprises a steel sheet; and a plating layer on the steel sheet, wherein a number of voids per 1000 μm2 of an area from an interface between the plating layer and the steel sheet to 15 μm is zero and wherein 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 is 7 wt %/μm or less.

公开(公告)号：US20240191329A1

公开(公告)日：2024-06-13

申请号：US18444558

申请日：2024-02-16

Applicant: POSCO CO., LTD

Inventor： Seong-Woo KIM ,  Jin-Keun OH ,  Yeol-Rae CHO ,  Hyeon-Jeong SHIN

IPC: C22C38/32 ,  B23K35/02 ,  B23K35/30 ,  B23K103/16 ,  B23K103/20 ,  C21D8/02 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C23C2/02 ,  C23C2/12 ,  C23C2/26 ,  C23C2/28 ,  C23C2/40

CPC classification number: C22C38/32 ,  B23K35/0238 ,  B23K35/3086 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C23C2/02 ,  C23C2/0224 ,  C23C2/12 ,  C23C2/261 ,  C23C2/28 ,  C23C2/29 ,  C23C2/40 ,  B23K2103/166 ,  B23K2103/20 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008

Abstract: Provided is an Al—Fe-alloy plated steel sheet for hot forming, having excellent TWB welding characteristics since excellent hardness uniformity of a TWB weld zone after hot forming is obtained by suitably controlling a batch annealing condition, after plating Al, such that an Al—Fe-alloy layer is formed; a hot forming member; and manufacturing methods therefor.

公开(公告)号：US20240009963A1

公开(公告)日：2024-01-11

申请号：US18372314

申请日：2023-09-25

Applicant: POSCO Co., Ltd.

Inventor： Seong-Woo KIM ,  Jin-Keun OH ,  A-Ra CHO ,  Hyeon-Jeong SHIN

IPC: B32B15/01 ,  C22C38/32 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D9/46 ,  C21D6/00 ,  C21D1/84 ,  C22C21/02 ,  C22F1/043 ,  C23C2/12 ,  C23C2/28 ,  B21D22/02

CPC classification number: B32B15/011 ,  C22C38/32 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/002 ,  C22C38/001 ,  C21D9/46 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D1/84 ,  C22C21/02 ,  C22F1/043 ,  C23C2/12 ,  C23C2/28 ,  B21D22/02

Abstract: The present invention relates to a hot press formed member. A hot press formed member according to one aspect of the present invention comprises a steel sheet; and a plating layer on the steel sheet, wherein a number of voids per 1000 μm2 of an area from an interface between the plating layer and the steel sheet to 15 μm is zero and wherein 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 is 7 wt %/μm or less.