公开(公告)号：US20240181748A1

公开(公告)日：2024-06-06

申请号：US18406848

申请日：2024-01-08

Applicant: POSCO CO., LTD

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 ,  C23C2/26 ,  C23C2/28 ,  C23C2/40

CPC classification number: B32B15/012 ,  C22C21/02 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/28 ,  C22C38/32 ,  C23C2/12 ,  C23C2/26 ,  C23C2/28 ,  C23C2/29 ,  C23C2/40 ,  Y10T428/12757

Abstract: The present disclosure relates to 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：US11981975B2

公开(公告)日：2024-05-14

申请号：US18171308

申请日：2023-02-17

Applicant: POSCO CO., LTD

Inventor： Sung-Il Kim ,  Hyun-Taek Na ,  Dong-Wan Kim

IPC: C21D9/46 ,  C21D6/00 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/06 ,  C22C38/48 ,  C22C38/50 ,  C22C38/58

CPC classification number: C21D9/46 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0226 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/06 ,  C22C38/48 ,  C22C38/50 ,  C22C38/58 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008

Abstract: Provided is a method for manufacturing a steel sheet, the method including: reheating a steel slab at a temperature of 1200° C. to 1350° C., the steel slab including, by weight %, carbon (C): 0.05% to 0.14%, silicon (Si): 0.01% to 1.0%, manganese (Mn): 1.5% to 2.5%, aluminum (Al): 0.01% to 0.1%, chromium (Cr): 0.005% to 1.0%, phosphorus (P): 0.001% to 0.05%, sulfur (S): 0.001% to 0.01%, nitrogen (N): 0.001% to 0.01%, niobium (Nb): 0.005% to 0.06%, titanium (Ti): 0.005% to 0.11%, and a balance of iron (Fe) and inevitable impurities; finish hot rolling the reheated steel slab under predetermined conditions to obtain a hot-rolled steel sheet; cooling the hot-rolled steel sheet at a cooling rate of 10° C./s to 100° C./s to a temperature of 400° C. to 500° C. after the finish hot rolling; and coiling the steel sheet at a temperature of 400° C. to 500° C. after the cooling.

公开(公告)号：US20240110267A1

公开(公告)日：2024-04-04

申请号：US18537245

申请日：2023-12-12

Applicant: POSCO CO., LTD

Inventor： Kyung-Keun Um ,  Woo-Gyeom Kim ,  Hong-Ju Lee

IPC: C22C38/58 ,  C21D6/00 ,  C21D8/02 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50

CPC classification number: C22C38/58 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D8/02 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0263 ,  C21D9/46 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/009

Abstract: The present invention relates to a steel material for pressure vessels, offshore structures and the like and, more specifically, to a high-strength steel material having excellent low-temperature strain aging impact properties and a method for manufacturing same.

公开(公告)号：US20240093326A1

公开(公告)日：2024-03-21

申请号：US18038604

申请日：2021-11-15

Applicant: POSCO CO., LTD

Inventor： Soon-Taik HONG

IPC: C21D9/46 ,  C21D1/18 ,  C21D1/84 ,  C21D6/00 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26

CPC classification number: C21D9/46 ,  C21D1/18 ,  C21D1/84 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0263 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C21D2211/002 ,  C21D2211/008

Abstract: The present invention relates to a pressure vessel steel plate having excellent high temperature PWHT resistance, comprising: 0.10-0.16 weight % C; 0.20-0.35 weight % Si; 0.4-0.6 weight % Mn; 7.5-8.5 weight % Cr; 0.7-1.0 weight % Mo; 0.005-0.05 weight % Al; 0.015 weight % or less P, 0.002 weight % or less S; 0.001-0.025 weight % Nb; and 0.25-0.35 weight % V, with the remainder being Fe and unavoidable impurities.

公开(公告)号：US20240092060A1

公开(公告)日：2024-03-21

申请号：US18265566

申请日：2021-11-30

Applicant: POSCO Co., Ltd

Inventor： Jin-Tae Kim ,  Dae-Gyu Kang ,  Yang-Ho Choi ,  Jung-Hwan Lee

IPC: B32B15/04 ,  B32B5/20 ,  B32B15/18 ,  C08J9/00 ,  C08J9/10 ,  C08K3/36 ,  C08K5/11 ,  C08K5/14 ,  C08K7/18 ,  C09D5/00 ,  C09D7/40 ,  C09D7/61 ,  C09D7/63 ,  C09D127/06 ,  C09D133/08

CPC classification number: B32B15/046 ,  B32B5/20 ,  B32B15/18 ,  C08J9/0023 ,  C08J9/103 ,  C08K3/36 ,  C08K5/11 ,  C08K5/14 ,  C08K7/18 ,  C09D5/002 ,  C09D7/61 ,  C09D7/63 ,  C09D7/69 ,  C09D7/70 ,  C09D127/06 ,  C09D133/08 ,  B32B2250/02 ,  B32B2255/06 ,  B32B2255/26 ,  B32B2266/0235 ,  B32B2266/104 ,  B32B2307/102 ,  B32B2307/56 ,  B32B2307/7376 ,  C08J2327/06

Abstract: Provided is an unconstrained vibration damping metal sheet with foam pores. The unconstrained vibration damping metal sheet of the present invention comprises: a metal sheet; an organic-inorganic pretreatment layer containing an acrylic resin formed on the metal sheet; and a foam resin layer formed on the pretreatment layer, the foam resin layer containing, based on weight % thereof, a thermoplastic polyvinyl chloride resin: 40-80%, a plasticizer: 5-40%, a foaming agent: 0.1-10%, an oxide-based crosslinker: 1-4%, and spherical silica: 1-10%.

公开(公告)号：US20240079166A1

公开(公告)日：2024-03-07

申请号：US18268441

申请日：2021-12-17

Applicant: POSCO Co., Ltd.

Inventor： Daehyun SONG ,  Sangwoo LEE

IPC: H01F1/147 ,  C21D8/02 ,  C21D9/46 ,  C22C38/00 ,  C22C38/04 ,  C22C38/06 ,  C22C38/34 ,  C22C38/60

CPC classification number: H01F1/14775 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0257 ,  C21D8/0263 ,  C21D8/0273 ,  C21D9/46 ,  C22C38/001 ,  C22C38/002 ,  C22C38/008 ,  C22C38/04 ,  C22C38/06 ,  C22C38/34 ,  C22C38/60 ,  C21D2201/05 ,  C22C2202/02

Abstract: A grain-oriented electrical steel sheet according to an embodiment of the present invention comprises, by wt %, 2.0-4.0% of Si, 0.04-0.2% of Mn, 0.010% or less of N (excluding 0%), 0.005% or less of C (excluding 0%), 0.03-0.08% of Sn and 0.01-0.2% of Cr, the balance of Fe and inevitable impurities, and inclusions comprising at least one from among AlN, (Al,Si)N, (Al,Si,Mn)N, MnS, CuS and Al2O3, wherein the average diameter of the inclusions is 0.5-6.0 μm, and 40-130/mm2 inclusions having a diameter of 6.0 μm or less from among the inclusions can be included.

公开(公告)号：US11919062B2

公开(公告)日：2024-03-05

申请号：US18098945

申请日：2023-01-19

Applicant: POSCO Co., Ltd

Inventor： Hong Gee Kim ,  Hyun Sung Son

IPC: B21D22/02 ,  B32B15/01 ,  C21D1/18 ,  C21D6/00 ,  C21D9/46 ,  C22C21/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/32

CPC classification number: B21D22/022 ,  B32B15/012 ,  C21D1/18 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D9/46 ,  C22C21/02 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/32

Abstract: An method of manufacturing a hot press-formed member comprises heating a blank of an aluminum-based plated steel sheet in a heating furnace, removing the heated blank from the heating furnace and conveying the removed blank between an upper mold portion and a lower mold portion of a mold, mounted on a press, to be seated; and performing a forming process after the upper mold portion of the mold is in contact with the seated blank.

公开(公告)号：US20240052472A1

公开(公告)日：2024-02-15

申请号：US18268149

申请日：2021-12-07

Applicant: POSCO Co., Ltd

Inventor： Ki-Cheol Kang ,  Jong-Chan Park ,  Seul-Gi So ,  Myung-Soo Kim

IPC: C23C2/06 ,  C23C2/40 ,  C21D9/46 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/34 ,  C22C38/38 ,  C22C38/06 ,  C22C38/00 ,  C21D8/02

CPC classification number: C23C2/06 ,  C23C2/40 ,  C21D9/46 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/34 ,  C22C38/38 ,  C22C38/06 ,  C22C38/001 ,  C21D8/0226 ,  C21D8/0273 ,  C21D8/0294 ,  C21D2211/005

Abstract: According to one aspect of the present invention, provided are a high-strength hot-dipped galvanized steel sheet having excellent surface quality and spot weldability, and a manufacturing method therefor.

公开(公告)号：US20240052471A1

公开(公告)日：2024-02-15

申请号：US18265370

申请日：2021-12-20

Applicant: POSCO Co., Ltd

Inventor： Tae-Chul Kim ,  Il-Ryoung Sohn ,  Bong-Hwan Yoo

IPC: C23C2/06 ,  C21D9/46 ,  C21D1/84 ,  C22C18/04 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D6/00 ,  B32B15/01 ,  C23C2/20 ,  C23C2/40

CPC classification number: C23C2/06 ,  C21D9/46 ,  C21D1/84 ,  C22C18/04 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/002 ,  C21D6/005 ,  C21D6/008 ,  B32B15/013 ,  C23C2/20 ,  C23C2/40

Abstract: The present invention relates to a plated steel sheet which can be used for automobiles, home appliances, building materials, etc. and a method for manufacturing same and, more particularly, to a zinc alloy plated steel sheet having excellent adhesion to an adhesive and a method for manufacturing same.

公开(公告)号：US20240052452A1

公开(公告)日：2024-02-15

申请号：US18268143

申请日：2021-12-15

Applicant: POSCO Co., Ltd

Inventor： Jaiik Kim

IPC: C21D9/46 ,  C22C38/16 ,  C22C38/12 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D8/02 ,  C21D6/00

CPC classification number: C21D9/46 ,  C22C38/16 ,  C22C38/12 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/002 ,  C22C38/001 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0263 ,  C21D6/005 ,  C21D6/008

Abstract: The present invention relates to a high-strength cold-rolled enamel steel sheet and a method of manufacturing same, the enamel steel sheet comprising, in weight %, C:0.01-0.1%, Mn:0.05-0.4%, Si:0.001-0.03%, Al:0.03-0.12%, P:0.02-0.04%, S:0.001-0.02%, Cu: 0.03-0.08%, Mo:0.13-0.30%, N: 0.004% or less, 0:0.003% or less, and the balance being Fe and inevitable impurities, wherein the high-strength cold-rolled enamel steel sheet has an oxide layer with a thickness of 0.006-0.030 μm formed in an inward direction from the surface thereof and satisfies formulas (1) and (2), and thus has no bubble defects and excellent fish scale resistance and enamel adhesion after enamel treatment.