公开(公告)号：US11898252B2

公开(公告)日：2024-02-13

申请号：US17786452

申请日：2020-12-18

Applicant: POSCO

Inventor： Suk-Kyu Lee ,  Hyeon-Seok Hwang ,  Myung-Soo Kim ,  Kwang-Tai Min ,  Dae-Young Kang

IPC: C23C2/12 ,  C22C21/00 ,  C22C38/02 ,  C22C38/04 ,  C23C28/00 ,  C23C2/28

CPC classification number: C23C2/12 ,  C22C21/00 ,  C22C38/02 ,  C22C38/04 ,  C23C2/28 ,  C23C2/29 ,  C23C28/345

Abstract: The present disclosure relates to an aluminum alloy-plated steel sheet having excellent workability and corrosion resistance and a method for manufacturing the same, and more particularly, to an aluminum alloy-plated steel sheet preventing microcracks generated during hot forming and has excellent seizure resistance and corrosion resistance, and a method for manufacturing the same.

公开(公告)号：US11897229B2

公开(公告)日：2024-02-13

申请号：US17784729

申请日：2020-12-18

Applicant: POSCO

Inventor： Suk-Kyu Lee ,  Hyeon-Seok Hwang ,  Myung-Soo Kim

IPC: B32B15/01 ,  C23C2/28 ,  C22C21/02 ,  C22C21/10 ,  C22C38/02 ,  C22C38/04 ,  C22C38/14 ,  C23C2/12 ,  C23C2/40 ,  C23C2/26

CPC classification number: B32B15/012 ,  C22C21/02 ,  C22C21/10 ,  C22C38/02 ,  C22C38/04 ,  C22C38/14 ,  C23C2/12 ,  C23C2/26 ,  C23C2/261 ,  C23C2/29 ,  C23C2/40 ,  B32B2307/718 ,  B32B2307/732

Abstract: The present disclosure relates to an aluminum alloy-plated steel sheet having excellent workability and corrosion resistance and a method for manufacturing the same, and more particularly, to an aluminum alloy-plated steel sheet preventing microcracks generated during hot forming and has excellent seizure resistance and corrosion resistance, and a method for manufacturing the same.

公开(公告)号：US11358369B2

公开(公告)日：2022-06-14

申请号：US16957950

申请日：2018-12-21

Applicant: POSCO

Inventor： Hyeon-Seok Hwang ,  Il-Jeong Park ,  Myung-Soo Kim

IPC: B32B15/10 ,  B32B15/01 ,  C22C21/10 ,  C22C38/02 ,  C22C38/04 ,  C23C2/12 ,  C23C2/28 ,  C23C2/40

Abstract: A plating steel sheet for hot press forming includes: a base steel sheet; an Al—Zn-based plating layer formed on at least one surface of the base steel sheet; and an Fe—Al-based surface alloy layer formed between the base steel sheet and the Al—Zn-based plating layer, wherein the Al—Zn-based plating layer can include 10-30 wt % of Zn, 1 wt % or less of Fe, and the balance of Al and impurities.

公开(公告)号：US10570493B2

公开(公告)日：2020-02-25

申请号：US15105498

申请日：2014-12-23

Applicant: POSCO

Inventor： Myung-Soo Kim ,  Hyeon-Seok Hwang

IPC: B32B15/00 ,  C23C2/12 ,  C23C2/26 ,  C22C21/08 ,  C22C38/00 ,  C22C21/06

Abstract: The present invention relates to: a steel sheet for hot press forming that is used for vehicle parts and the like and, more particularly, to a steel sheet for hot press forming with excellent corrosion resistance and weldability; a forming member; and a manufacturing method therefor.

公开(公告)号：US20250034692A1

公开(公告)日：2025-01-30

申请号：US18918969

申请日：2024-10-17

Applicant: POSCO Co., Ltd.

Inventor： Suk-Kyu Lee ,  Hyeon-Seok Hwang ,  Myung-Soo Kim ,  Jong-Gi Oh ,  Kwang-Tai Min

IPC: C23C2/28 ,  C22C21/00 ,  C22C38/02 ,  C22C38/04 ,  C23C2/12 ,  C23C2/26 ,  C23C2/40

Abstract: An aluminum alloy-plated steel sheet having excellent workability and corrosion resistance and a method for manufacturing the same are disclosed. The aluminum alloy-plated steel sheet includes a base sheet, and an alloy-plated layer formed on the base sheet. Interfacial roughness between the alloy-plated layer and the base steel sheet is 25 μm or less. Such an aluminum alloy-plated steel sheet prevents microcracks generated during hot forming and has excellent seizure resistance and corrosion resistance. A method for manufacturing such an aluminum alloy-plated steel is also disclosed.

公开(公告)号：US20240052495A1

公开(公告)日：2024-02-15

申请号：US17766335

申请日：2020-12-18

Applicant: POSCO

Inventor： Suk-Kyu Lee ,  Hyeon-Seok Hwang ,  Myung-Soo Kim ,  Jong-Gi Oh ,  Kwang-Tai Min

IPC: C23C28/00

CPC classification number: C23C28/321 ,  C23C28/345

Abstract: The present disclosure relates to an aluminum alloy-plated steel sheet having excellent workability and corrosion resistance and a method for manufacturing the same, and more particularly, to an aluminum alloy-plated steel sheet that prevents microcracks generated during hot forming and has excellent seizure resistance and corrosion resistance, and a method for manufacturing the same.

公开(公告)号：US11090907B2

公开(公告)日：2021-08-17

申请号：US16471203

申请日：2017-12-22

Applicant: POSCO

Inventor： Ki-Cheol Kang ,  Hyeon-Seok Hwang ,  Yon-Kyun Song ,  Il-Jeong Park

IPC: B32B15/01 ,  C22C21/02 ,  C23C2/12 ,  C23C2/16 ,  C23C2/28

Abstract: Provided is a hot dip aluminized steel material including a base steel and a hot-dip Al—Si-coated layer, wherein the surface layer of the base steel is provided with an Al-enriched layer in which 2 wt % to 20 wt % of Al is solid-solubilized, and an interface between the base steel and the hot-dip Al—Si-coated layer has a double-layer structured interfacial alloy layer having different hardnesses.

公开(公告)号：US12152305B2

公开(公告)日：2024-11-26

申请号：US17766335

申请日：2020-12-18

Applicant: POSCO

Inventor： Suk-Kyu Lee ,  Hyeon-Seok Hwang ,  Myung-Soo Kim ,  Jong-Gi Oh ,  Kwang-Tai Min

IPC: C22C21/00 ,  C22C38/02 ,  C22C38/04 ,  C23C2/12 ,  C23C2/26 ,  C23C2/28 ,  C23C2/40

Abstract: An aluminum alloy-plated steel sheet having excellent workability and corrosion resistance and a method for manufacturing the same are disclosed. The aluminum alloy-plated steel sheet that includes a base sheet, and an alloy-plated layer formed on the base sheet. Interfacial roughness between the alloy-plated layer and the base steel sheet is 25. μm or less. Such an aluminum alloy-plated steel sheet prevents microcracks generated during hot forming and has excellent seizure resistance and corrosion resistance. A method for manufacturing such an aluminum alloy-plated steel is also disclosed.

公开(公告)号：US20240082902A1

公开(公告)日：2024-03-14

申请号：US18385162

申请日：2023-10-30

Applicant: POSCO CO., LTD

Inventor： Hyeon-Seok Hwang ,  Il-Ryoung Sohn ,  Jong-Sang Kim

IPC: B21D22/02 ,  B21D22/20 ,  C21D1/673 ,  C21D8/00 ,  C23C2/06 ,  C23C2/26 ,  C23C2/28 ,  C23C2/40

CPC classification number: B21D22/02 ,  B21D22/20 ,  C21D1/673 ,  C21D8/005 ,  C23C2/06 ,  C23C2/261 ,  C23C2/29 ,  C23C2/40 ,  B21D22/022

Abstract: Disclosed are a hot press-formed article and a method for manufacturing the same. The article is manufactured by hot press forming a galvanized steel sheet comprising a base steel plate and a zinc-based coat layer formed on a surface of the base steel plate, wherein the zinc-based coat layer contains at least one element selected from the group consisting of Sb, Sn, and Bi in a total amount of 0.05% to 2.0% by weight, and a balanced amount of Zn and inevitable impurities, at least 70% by weight of the at least one element selected from the group consisting of Sb, Sn, Bi being concentrated in a region 3 μm or less distant from the surface of an alloyed zinc-based coat layer, formed by alloying the zinc-based coat layer, of the hot press-formed article.

公开(公告)号：US11801665B2

公开(公告)日：2023-10-31

申请号：US17297266

申请日：2019-11-28

Applicant: POSCO

Inventor： Hyeon-Seok Hwang

IPC: B32B15/01 ,  C23C2/02 ,  C23C2/06 ,  C23C2/40 ,  C21D9/46 ,  C21D1/26 ,  C21D1/74 ,  C23C2/16 ,  C23C2/18 ,  C23C2/26 ,  C23C2/20 ,  B23H1/00 ,  B21B27/00 ,  B21B27/02 ,  B32B3/26 ,  B32B3/30 ,  B32B7/02 ,  C21D7/04 ,  C23C30/00 ,  B21B1/22 ,  B21B1/24 ,  B32B15/04 ,  B32B15/18 ,  B24C1/00 ,  B23K26/362 ,  B24C1/08 ,  B23K26/36 ,  B23K26/352 ,  C23F4/00

CPC classification number: B32B15/013 ,  B21B1/22 ,  B21B1/227 ,  B21B1/24 ,  B21B27/00 ,  B21B27/005 ,  B21B27/021 ,  B23H1/00 ,  B23K26/352 ,  B23K26/36 ,  B23K26/362 ,  B24C1/00 ,  B24C1/08 ,  B32B3/26 ,  B32B3/263 ,  B32B3/30 ,  B32B7/02 ,  B32B15/012 ,  B32B15/04 ,  B32B15/043 ,  B32B15/18 ,  C21D1/26 ,  C21D1/74 ,  C21D7/04 ,  C21D9/46 ,  C23C2/02 ,  C23C2/022 ,  C23C2/06 ,  C23C2/16 ,  C23C2/18 ,  C23C2/20 ,  C23C2/26 ,  C23C2/40 ,  C23C30/00 ,  C23C30/005 ,  C23F4/00 ,  C21D2241/00 ,  Y10T428/12451 ,  Y10T428/12472 ,  Y10T428/12757 ,  Y10T428/12799 ,  Y10T428/12951 ,  Y10T428/12972 ,  Y10T428/12993

Abstract: Provided is a hot-dip galvanized steel sheet to be used for home appliances, vehicles, and the like, and having excellent surface appearance and low-temperature bonding brittleness. The hot-dip galvanized steel sheet includes: a base steel sheet; and a hot-dip galvanized layer formed on the base steel sheet. A surface of the base steel sheet has a centerline average roughness (Ra) of 0.3 or more, a roughness skewness (Rsk) of −1 or less, and a roughness kurtosis (Rku) of 6 or more.