公开(公告)号：US20210348257A1

公开(公告)日：2021-11-11

申请号：US17271345

申请日：2019-08-23

Applicant: POSCO

Inventor： Suk-Kyu LEE ,  Il-Jeong PARK ,  Myung-Soo KIM

IPC: C23C2/12 ,  B32B15/01 ,  C23C2/20 ,  C22C21/10 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02

Abstract: Provided are an aluminum-zinc alloy plated steel sheet having excellent hot workability and corrosion resistance, and a method for manufacturing same. The plated steel sheet has an Al—Zn hot-dip aluminized coating layer on a base steel sheet, wherein: the coating layer is composed of a lower layer part and an upper layer part; the lower layer part comprises 40-50% of Fe, 50-60% of Al, 1% or less of Si, and other unavoidable impurities, on the basis of wt % of the lower layer part itself; the upper layer part comprises 10-30% of Zn, the balance of Al, and 0.05% or less of at least one of Cr, Mo, and Ni as an impurity, on the basis of wt % of the upper layer part itself; and the thickness of the upper layer part accounts for 30% or less of the total thickness of the coating layer.

公开(公告)号：US20210062038A1

公开(公告)日：2021-03-04

申请号：US16957951

申请日：2018-12-11

Applicant: POSCO

Inventor： Jin-Tae KIM ,  Myung-Soo KIM ,  Jung-Hwan LEE ,  Ha-Na CHOI

IPC: C09D183/08 ,  C09D7/63 ,  C09D5/08

Abstract: The present invention relates to a chromium-free metal surface treatment composition comprising 10-30 parts by weight of a silane-based compound, 0.5-6 parts by weight of an organic acid, 0.1-3 parts by weight of a vanadium compound, 0.1-3 parts by weight of a magnesium compound, 0.5-3 parts by weight of a wax and a balance of a solvent. The metal surface treatment composition of the present invention can ensure slip resistance and required properties such as corrosion resistance and workability, thereby enabling a metal material to be prevented from slipping or falling off during processing, pipe making and the like.

公开(公告)号：US20210381091A1

公开(公告)日：2021-12-09

申请号：US17311136

申请日：2019-12-12

Applicant: POSCO

Inventor： Heung-Yun KIM ,  Do-Kyeong HAN ,  Myung-Soo KIM

IPC: C23C2/06 ,  C23C2/26 ,  C23C2/40

Abstract: Provided is a zinc alloy-plated steel material used in automobiles, building materials, home appliances, or the like, and more specifically, to a zinc alloy-plated steel material having excellent corrosion resistance and surface quality, and a method for producing same.

公开(公告)号：US20210010106A1

公开(公告)日：2021-01-14

申请号：US16956743

申请日：2018-12-20

Applicant: POSCO

Inventor： Heung-Yun KIM ,  Myung-Soo KIM

IPC: C22C18/04 ,  C23C2/06 ,  C23C2/14 ,  C23C2/26

Abstract: Provided is a plated steel to be used for automobiles, electric home appliances, building materials and the like and, more specifically, to a zinc alloy-plated steel having excellent corrosion resistance and surface smoothness, and a method for manufacturing the same.

公开(公告)号：US20200324519A1

公开(公告)日：2020-10-15

申请号：US16956248

申请日：2018-12-06

Applicant: POSCO

Inventor： Jin-Tae KIM ,  Myung-Soo KIM ,  Jung-Hwan LEE ,  Ha-Na CHOI

IPC: B32B15/12 ,  B32B5/18 ,  B32B15/04 ,  B32B15/18 ,  B32B25/06 ,  B32B29/06

Abstract: A composite material steel sheet comprises: at least one steel sheet, and a resin-impregnated paper composite layer, wherein the resin-impregnated paper composite layer may comprise stacked sheets of paper, and impregnated resin provide adhesion between the sheets of paper in contact with each other.

公开(公告)号：US20170369974A1

公开(公告)日：2017-12-28

申请号：US15534295

申请日：2015-12-08

Applicant: POSCO

Inventor： Myung-Soo KIM ,  Ki-Cheol KANG

IPC: C22C38/02 ,  C22C38/06 ,  C21D8/02 ,  C22C38/04 ,  C23C2/06 ,  C22C38/60

CPC classification number: C22C38/02 ,  B32B15/012 ,  B32B15/013 ,  B32B15/04 ,  B32B15/043 ,  B32B15/18 ,  C21D6/005 ,  C21D6/008 ,  C21D8/02 ,  C21D8/0226 ,  C21D8/0247 ,  C21D8/0257 ,  C21D8/0273 ,  C21D8/0436 ,  C21D8/0468 ,  C21D8/0473 ,  C21D9/48 ,  C21D9/561 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/002 ,  C22C38/008 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/28 ,  C22C38/32 ,  C22C38/34 ,  C22C38/38 ,  C22C38/60 ,  C23C2/02 ,  C23C2/06 ,  C23C2/12 ,  C23C2/28 ,  C23C2/40 ,  C23C28/021 ,  C23C28/023 ,  C23C28/025 ,  C23C28/321 ,  C23C30/00 ,  C23C30/005 ,  Y10T428/12757 ,  Y10T428/12799 ,  Y10T428/12951 ,  Y10T428/12958 ,  Y10T428/12972 ,  Y10T428/26

Abstract: The present invention relates to an ultra-high strength, hot-dip galvanized steel sheet having excellent surface quality and coating adherence and to a method for manufacturing thereof, the ultra-high strength, hot-dip galvanized steel sheet comprising: 0.1-0.3% by weight carbon (C); 0.1-2.0% by weight silicon (Si); 0.005-1.5% by weight aluminum (Al); 1.5-3.5% by weight manganese (Mn); 0.04% by weight or less phosphorus (P) (excluding 0% by weight); 0.015% by weight or less sulphur (S) (excluding 0% by weight); 0.02% by weight or less nitrogen (N) (excluding 0% by weight); the balance being Fe; and other inevitable impurities, and further comprising 0.01 wt.% to 0.07 wt.% of at least one kind of element selected from the group consisting of bismuth (Bi), tin (Sn) and antimony (Sb).

公开(公告)号：US20230026159A1

公开(公告)日：2023-01-26

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 ,  C22C38/04 ,  C22C38/02 ,  C23C28/00 ,  C22C21/00

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：US20210008837A1

公开(公告)日：2021-01-14

申请号：US16957950

申请日：2018-12-21

Applicant: POSCO

Inventor： Hyeon-Seok HWANG ,  Il-Jeong PARK ,  Myung-Soo KIM

IPC: B32B15/01 ,  C22C21/10 ,  C22C38/04 ,  C22C38/02 ,  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：US20170029955A1

公开(公告)日：2017-02-02

申请号：US15102833

申请日：2014-12-12

Applicant: POSCO

Inventor： Myung-Soo KIM ,  Hyeon-Seok HWANG ,  Young-Jin KWAK

IPC: C23C28/02 ,  C23C24/02 ,  C22C38/60 ,  C22C38/38 ,  C22C38/32 ,  C22C38/28 ,  C22C38/26 ,  C22C38/24 ,  C22C38/22 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  B32B15/01 ,  B21D22/02 ,  C23C2/12

CPC classification number: C23C28/021 ,  B21D22/022 ,  B32B15/011 ,  B32B15/012 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C22C38/60 ,  C23C2/12 ,  C23C2/28 ,  C23C14/14 ,  C23C24/02 ,  C23C28/42

Abstract: The present invention relates to a plated steel sheet for hot press forming, a hot-press forming member manufactured using the same, and a manufacturing method thereof. The plated steel sheet comprises: a base steel sheet and a composite plated layer that is formed on at least one surface of the base steel sheet, and has a Mn-based plated layer and an Al-based plated layer alternately formed therein, an Al-based plated layer being formed on the uppermost layer thereof, wherein the composite plated layer has a total thickness of 5 to 30 μm, and in this case, the Mn-based plated layer accounts for 5 to 60% of the total thickness.

Abstract translation: 本发明涉及一种热压成形用镀覆钢板，使用其制造的热压成形件及其制造方法。 电镀钢板包括：基体钢板和形成在基体钢板的至少一个表面上的复合镀层，并且其中交替地形成有Mn基镀层和Al系镀层，Al 的镀层形成在其最上层，其中复合镀层的总厚度为5〜30μm，在这种情况下，Mn系镀层占总厚度的5〜60％。

公开(公告)号：US20240026514A1

公开(公告)日：2024-01-25

申请号：US18266269

申请日：2021-12-15

Applicant: POSCO CO., LTD

Inventor： Suk-Kyu LEE ,  Jong-Gi OH ,  Myung-Soo KIM

IPC: C23C2/12 ,  C23C2/40 ,  C21D9/46 ,  C22C38/04 ,  C22C38/06 ,  C21D8/02 ,  C23C2/00 ,  C22C21/10

CPC classification number: C23C2/12 ,  C23C2/40 ,  C21D9/46 ,  C22C38/04 ,  C22C38/06 ,  C21D8/0273 ,  C23C2/522 ,  C22C21/10 ,  C21D2211/001 ,  C21D2211/005

Abstract: Provided is an aluminum coated steel sheet having excellent anti-corrosion properties and weldability, and a manufacturing method thereof. The aluminum coated steel sheet includes: an austenitic base steel sheet including at least 70 area % of an austenite microstructure; and an aluminum coating layer formed on the base steel sheet, wherein the base steel sheet includes at least 80 area % of ferrite in a surface layer portion, which denotes a region extending from the interface with the coating layer to a depth of 100 μm into the base steel sheet, and the aluminum coating layer may have a composition comprising 2-12 wt % of Si, 5-30 wt % of Zn, and 0.1-5 wt % of Mn, with the balance being Al and inevitable impurities.