公开(公告)号：US20150159253A1

公开(公告)日：2015-06-11

申请号：US14413530

申请日：2013-07-23

Applicant: POSCO

Inventor： Min-Suk Oh ,  Young-Sool Jin ,  Sang-Heon Kim ,  Su-Young Kim ,  Bong-Hwan Yoo

IPC: C23C2/06 ,  C22C18/00 ,  C22C18/04 ,  C23C2/16

CPC classification number: C23C2/06 ,  C22C18/00 ,  C22C18/04 ,  C23C2/16 ,  C23C2/20 ,  C23C2/28 ,  Y10T428/12799

Abstract: Provided is a hot dip zinc alloy plated steel sheet which is widely used in vehicles, domestic appliances, construction materials or the like and a method for manufacturing the same. A Zn—Al—Mg hot dip zinc alloy plating bath is used for manufacturing the hot dip zinc alloy plated steel strip, and a small amount of Ga or In is added to the plating bath for inhibiting an oxidation reaction of Mg in the plating bath so as to obtain excellent corrosion resistance and external surface of the plated steel sheet which is manufactured at this point.

Abstract translation: 提供广泛用于车辆，家用电器，建筑材料等的热浸锌合金镀覆钢板及其制造方法。 使用Zn-Al-Mg热浸锌合金电镀浴来制造镀锌钢合金板，并且在镀浴中加入少量的Ga或In，以抑制镀液中的Mg的氧化反应 从而获得在此制造的镀覆钢板的优异的耐腐蚀性和外表面。

公开(公告)号：US20250137086A1

公开(公告)日：2025-05-01

申请号：US18694191

申请日：2022-11-14

Applicant: POSCO CO., LTD

Inventor： Sea-Woong Lee ,  Jin-Keun Oh ,  Seong-Woo Kim ,  Sang-Heon Kim ,  Hyo-Sik Chun ,  Ru-Ri Lee

IPC: C21D9/46 ,  C21D1/26 ,  C21D6/00 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/28 ,  C22C38/32

Abstract: The present invention relates to: a steel material for hot forming, used for a vehicle, etc.; a hot formed part; and a method for manufacturing thereof.

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：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：US11753709B2

公开(公告)日：2023-09-12

申请号：US16471289

申请日：2017-12-21

Applicant: POSCO

Inventor： Suk-Kyu Lee ,  Sang-Heon Kim ,  Kwang-Tai Min ,  Yon-Kyun Song

IPC: C23C2/06 ,  C22C18/00 ,  C23C2/26

CPC classification number: C23C2/06 ,  C22C18/00 ,  C23C2/26

Abstract: Provided are a hot-dipped galvanized steel material and a method for manufacturing the same. The hot-dipped galvanized steel material comprises an iron substrate and a hot-dipped galvanizing layer formed on the iron substrate, wherein the hot-dipped galvanizing layer comprises, by wt %, 0.01 to 0.5% of Al, 0.01 to 1.5% of Mg, 0.05 to 1.5% of Mn, 0.1 to 6% of Fe, and the balance of Zn and inevitable impurities, with a Zn—Fe—Mn based alloy phase present at the interface between the iron substrate and the hot-dipped galvanizing layer, and an area ratio of the Zn—Fe—Mn-based alloy phase to the hot-dipped galvanizing layer ranging from 1 to 60%.

公开(公告)号：US20250153234A1

公开(公告)日：2025-05-15

申请号：US18838858

申请日：2023-04-26

Applicant: POSCO CO., LTD

Inventor： Sang-Heon Kim ,  Jin-Keun Oh ,  Seong-Woo Kim ,  Sea-Woong Lee ,  Hyeon-Seok Hwang ,  Kkoch-Nim Oh

IPC: B21D22/02 ,  B32B15/01 ,  C21D6/00 ,  C21D8/02 ,  C21D9/48 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/14 ,  C22C38/16 ,  C22C38/60

Abstract: Provided are a hot press-formed part and a manufacturing method thereof, the hot press-formed part comprising: a base steel sheet; and a plating layer provided on at least one surface of the base steel sheet, wherein the plating layer includes an average number of Kirkendall voids per unit area in a specific range, in an area within 20 μm from the interface between the base steel sheet and the plating layer.

公开(公告)号：US20240410028A1

公开(公告)日：2024-12-12

申请号：US18794600

申请日：2024-08-05

Applicant: POSCO CO., LTD

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

IPC: C21D8/02 ,  C21D6/00 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/48 ,  C22C38/54 ,  C22C38/58 ,  C23C2/02 ,  C23C2/12 ,  C23C2/40

Abstract: Provided are plated steel sheets for hot press forming, hot press formed parts, and manufacturing methods thereof, the plated steel sheets comprising: a base steel sheet comprising, in weight %, C: 0.07 to 0.5%, Si: 0.05 to 1%, Mn: 0.5 to 5%, P: 0.001 to 0.015%, S: 0.0001 to 0.02%, Al: 0.01 to 0.18, Cr: 0.01 to 1%, N: 0.001 to 0.02%, Ti: 0.1% or less, B: 0.01% or less, Sn: 0.01 to 0.1%, and a balance of Fe and inevitable impurities; an aluminum or aluminum alloy plating layer disposed on at least one surface of the base steel sheet; and an Sn-enriched layer provided between the base steel sheet and the plating layer, wherein the Sn-enriched layer satisfies a specific relationship.

公开(公告)号：US20240401173A1

公开(公告)日：2024-12-05

申请号：US18691253

申请日：2022-12-20

Applicant: POSCO CO., LTD

Inventor： Jin-Keun Oh ,  Seong-Woo Kim ,  Sea-Woong Lee ,  Sang-Heon Kim ,  Jae-Seong Park ,  Ru-Ri Lee

IPC: C22C38/04 ,  C22C21/00 ,  C22C38/02 ,  C22C38/06 ,  C22C38/28 ,  C22C38/32 ,  C23C2/12 ,  C23C2/20

Abstract: The present disclosure relates to a plated steel sheet for hot press forming, having excellent paint adhesion and corrosion resistance after hot press forming; a preparation method for the plated steel sheet; and a hot press formed member. The plated steel sheet according to an aspect of the present disclosure comprises a base steel sheet and a plating layer consisting of Al—Fe alloy formed on the base steel sheet, wherein the sum of contents of Al and Fe in the plating layer is 80% or more by weight, the average content of Fe in the plating layer is 20% or more by weight, and the product of Ra and RPC of the surface of the plating layer may be 60-150 μm/cm. Here, Ra represents arithmetic mean roughness and the unit thereof is μm, and RPc represents the number of peaks per unit length and the unit thereof is /cm.

公开(公告)号：US20240295003A1

公开(公告)日：2024-09-05

申请号：US18643362

申请日：2024-04-23

Applicant: POSCO CO., LTD

Inventor： Seong-Woo Kim ,  Jin-Keun Oh ,  Sang-Heon Kim ,  Sang-Bin Han

IPC: C21D9/48 ,  B32B15/01 ,  C21D6/00 ,  C21D8/04 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/28 ,  C22C38/32 ,  C23C2/02 ,  C23C2/12 ,  C23C2/28 ,  C23C2/40

CPC classification number: C21D9/48 ,  B32B15/012 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0405 ,  C21D8/0421 ,  C21D8/0447 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/28 ,  C22C38/32 ,  C23C2/02 ,  C23C2/12 ,  C23C2/28 ,  C23C2/29 ,  C23C2/40

Abstract: The present invention pertains to a hot press forming member having excellent resistance to hydrogen embrittlement, and a method for manufacturing same. An aspect of the present invention provides a hot press forming member having excellent resistance to hydrogen embrittlement, the hot press forming member comprising a base steel plate and an alloy-plated layer formed on the surface of the base steel plate, wherein the alloy-plated layer contains pores such that pores having a size of 5 μm or less constitute 3-30% of the surface area of the alloy-plated layer as viewed in a cross-section taken in the thickness direction of the member.

公开(公告)号：US20230086620A1

公开(公告)日：2023-03-23

申请号：US17983759

申请日：2022-11-09

Applicant: POSCO

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

IPC: B32B15/01 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/28 ,  C22C38/32 ,  C23C2/12 ,  C23C2/28 ,  C23C2/40 ,  C23C24/04 ,  C23C28/02

Abstract: The present invention provides a steel sheet plated with aluminum-iron and a preparation method therefor, the steel sheet comprising: a base steel sheet; and a plated layer formed on the surface of the base steel sheet and comprising: an alloyed layer containing at least one of Fe3Al, FeAl(Si), Fe2Al5, and FeAl3; and an aluminum layer formed on the alloyed layer and having a thickness less than 10% of that of the plated layer, wherein the plated layer is 20-35 μm in thickness and contains 1-20 wt % of Mg as measured by GDS at a position 0.1 μm deep from the surface of the plated layer and 10 wt % of oxygen as measured by GDS at a position 0.1 μm deep from the surface of the plated layer.