公开(公告)号：US20240294210A1

公开(公告)日：2024-09-05

申请号：US18570960

申请日：2022-06-22

Applicant: POSCO CO., LTD

Inventor： Gyu-Min Lee

IPC: B62D25/02 ,  B62D21/15 ,  B62D27/02

CPC classification number: B62D25/025 ,  B62D27/023 ,  B62D27/026 ,  B62D21/157

Abstract: A side sill for a vehicle according to the present invention may comprises: a side sill frame formed to have a cavity portion; a partition member that passes through the cavity portion and partitions the cavity portion into a first cavity and a second cavity; a first reinforcing frame which is positioned in the first cavity and contacts the side sill frame and the partition member to form a closed section in the first cavity on a thickness-direction cross-section of the side sill frame; and a second reinforcing frame which is positioned in the second cavity and contacts the side sill frame and the partition member to form a closed section in the second cavity on a thickness-direction cross-section of the side sill frame.

公开(公告)号：US20240271240A1

公开(公告)日：2024-08-15

申请号：US18268557

申请日：2021-11-29

Applicant: POSCO Co., Ltd

Inventor： Byoung-jun Song ,  Youngjin Kwon ,  Gyujin Jo ,  Nayeon Chu

IPC: C21D9/00 ,  C21D1/18 ,  C21D6/00 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46

CPC classification number: C21D9/0081 ,  C21D1/18 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0263 ,  C21D8/0268 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C21D2211/008

Abstract: Disclosed is a martensitic stainless steel with improved strength and corrosion resistance. The disclosed martensitic stainless steel sheet comprises, in percent by weight (wt %), 0.3 to 0.5% of C, 0.01 to 0.025% of N, 0.3 to 0.5% of Si, 0.4 to 0.6 of Mn, 13.1 to 14.5% of Cr, 0.95 to 1.10% of Mo, 0.05 to 0.3% of V, 0.3 to 0.5% of Ni, 0.001 to 0.5% of Cu, and the balance being Fe and inevitable impurities, and satisfies Formula (1). Formula (1): 16.4≤(Cr+3.3Mo+16N)*(Mo+V)≤23.3, wherein Cr, N, Mo, and V denote the contents (wt %) of respective elements.

公开(公告)号：US20240254582A1

公开(公告)日：2024-08-01

申请号：US18019183

申请日：2021-08-11

Applicant: POSCO Co., Ltd

Inventor： Wan-Keun Kim ,  Duk-Gyu Kim

IPC: C21D8/02 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14

CPC classification number: C21D8/0226 ,  C21D8/0263 ,  C21D9/46 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/009

Abstract: The present invention relates to a steel sheet suitable as a material for transporting oil and gas, more particularly, to a hot-rolled steel sheet having excellent impact toughness in a welded zone after electric resistance welding (ERW), and to a hot-rolled steel sheet having excellent impact toughness at a cryogenic temperature of −20° C. or lower, that makes the sheet applied in a cold area, and a method for manufacturing same.

公开(公告)号：US12049679B2

公开(公告)日：2024-07-30

申请号：US18242140

申请日：2023-09-05

Applicant: POSCO Co., Ltd

Inventor： Jin-Keun Oh ,  Yeol-Rae Cho ,  A-Ra Cho ,  Jin-Ho Cha ,  Si-Myoung Heo ,  Jeong-Won Seo ,  Seong-Woo Kim

IPC: C21D9/46 ,  B21B3/02 ,  B21D22/02 ,  C21D6/00 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/50 ,  C22C38/54

CPC classification number: C21D9/46 ,  B21B3/02 ,  B21D22/022 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0247 ,  C22C38/001 ,  C22C38/002 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/50 ,  C22C38/54 ,  C21D2211/003 ,  C21D2211/005

Abstract: An aspect of the present invention relates to a cold-rolled steel plate for hot forming, which is excellent in corrosion-resistance and spot-weldability, contains, by weight %, C: 0.1-0.4%, Si: 0.5-2.0%, Mn: 0.01-4.0%, Al: 0.001-0.4%, P: 0.001-0.05%, S: 0.0001-0.02%, Cr: 0.5% to less than 3.0%, N: 0.001-0.02%, and a balance of Fe and inevitable impurities, satisfying formula (1) below, and includes an Si amorphous oxidation layer continuously or discontinuously formed at a thickness of 1 nm-100 nm on the surface thereof. Formula (1): 1.4≤0.4*Cr+Si≤3.2 (wherein element symbols denote measurements of respective element contents by weight %).

公开(公告)号：US12040110B2

公开(公告)日：2024-07-16

申请号：US17318407

申请日：2021-05-12

Applicant: POSCO CO., LTD

Inventor： Hyun-Seok Ko ,  Kyu-Seok Han ,  Hyung-Ki Park ,  Jin-Wook Seo ,  Jae-Soo Lim ,  Hyung Don Joo

IPC: C21D9/46 ,  C21D3/04 ,  C21D8/12 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  H01F1/147

CPC classification number: H01F1/14775 ,  C21D3/04 ,  C21D8/12 ,  C21D8/1222 ,  C21D8/1233 ,  C21D8/1255 ,  C21D8/1261 ,  C21D8/1266 ,  C21D8/1272 ,  C21D9/46 ,  C22C38/002 ,  C22C38/004 ,  C22C38/02 ,  C22C38/04

Abstract: Disclosed are an oriented electrical steel sheet and a manufacturing method thereof. An exemplary embodiment of the present invention provides a method of manufacturing an oriented electrical steel sheet, including: providing a slab including Si at 1.0 to 4.0 wt %, C at 0.1 to 0.4 wt %, and the remaining portion including Fe and other inevitably incorporated impurities; reheating the slab; producing a hot rolled steel sheet by hot rolling the slab; performing annealing of the hot rolled steel sheet; cold rolling the annealed hot rolled steel sheet; decarburizing and primary annealing the cold rolled steel sheet; cold rolling the decarburized and annealed steel sheet; and secondary annealing the cold rolled steel sheet.

公开(公告)号：US20240201626A1

公开(公告)日：2024-06-20

申请号：US18577649

申请日：2022-07-12

Applicant: POSCO CO., LTD.

Inventor： Sun-Hong Park ,  Jin-Tae Kim

IPC: G03G15/00 ,  G03G15/043 ,  G03G15/08 ,  G03G15/20 ,  G03G21/00 ,  G03G21/12

CPC classification number: G03G15/6591 ,  G03G15/0435 ,  G03G15/0806 ,  G03G15/2064 ,  G03G21/0011 ,  G03G21/0035 ,  G03G21/0076 ,  G03G21/12

Abstract: The present invention relates to printing equipment for printing images such as letters, pictures and the like on the surface of metal such as a steel plate, that may stably print images on the surface of metal at high speed, a printing method using the same, and a printed metal material obtained therefrom.

公开(公告)号：US20240182996A1

公开(公告)日：2024-06-06

申请号：US18286166

申请日：2022-08-12

Applicant: POSCO CO., LTD

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

IPC: C21D9/46 ,  C21D6/00 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/28 ,  C22C38/32 ,  C23C2/02 ,  C23C2/12 ,  C23C2/40

CPC classification number: C21D9/46 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0263 ,  C21D8/0278 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/28 ,  C22C38/32 ,  C23C2/0224 ,  C23C2/12 ,  C23C2/40

Abstract: The present invention relates to: a steel material for hot forming, used for a vehicle and the like; a hot-formed member; and a method for manufacturing same. In the method, when the formed steel material is skin pass rolled, rolling pressure and roughness of skin pass rolling rolls are controlled so that bendability can be improved.

公开(公告)号：US11998971B2

公开(公告)日：2024-06-04

申请号：US18123460

申请日：2023-03-20

Applicant: POSCO CO., LTD

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

IPC: B32B15/01 ,  B21D35/00 ,  C21D6/00 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/28 ,  C22C38/32 ,  C23C2/12 ,  C23C2/26 ,  C23C2/28 ,  C23C2/40

CPC classification number: B21D35/007 ,  B32B15/012 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D9/46 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/28 ,  C22C38/32 ,  C23C2/12 ,  C23C2/26 ,  C23C2/28 ,  C23C2/29 ,  C23C2/40

Abstract: The present disclosure provides a hot-press formed part comprising a plated steel sheet and an aluminum alloy plated layer formed on the plated steel sheet, wherein the aluminum alloy plated layer comprises: an alloying layer (I) formed on the plated steel sheet and containing, by weight %, 5-30% of Al; an alloying layer (II) formed on the alloying layer (I) and containing, by weight %, 30 to 60% of Al; an alloying layer (III) formed on the alloying layer (II) and containing, by weight %, 20-50% of Al and 5-20% of Si; and an alloying layer (IV) formed continuously or discontinuously on at least a part of the surface of the alloying layer (III), and containing 30-60% of Al, wherein the rate of the alloying layer (III) exposed on the outermost surface of the aluminum alloy plated layer is 10% or more.

公开(公告)号：US20240150924A1

公开(公告)日：2024-05-09

申请号：US18280811

申请日：2021-03-22

Applicant: POSCO CO., LTD

Inventor： Jin-Ho Jung ,  Won-Hwi Lee ,  Kkoch-Nim Oh ,  Sang-Bae Lim

IPC: C25D21/18 ,  C25D3/20 ,  C25D3/56 ,  C25D21/06

CPC classification number: C25D21/18 ,  C25D3/20 ,  C25D3/562 ,  C25D21/06

Abstract: A method for removing ferric ions contained in a sulfate-based iron electroplating solution comprises a step of regeneration for reduction of the ferric ions by circulating a ferric ion-containing sulfate-based iron electroplating solution in a solution bath containing ferrous metal charged therein, wherein the ferrous metal is charged in an amount that satisfies the following formula (1): S≥0.01 Iconv/Cmax (1). In formula (1), S indicates a total surface (m2) of ferrous metal, Cmax indicates a maximum permissible ion concentration level (g/L) of the ferric ions in the solution, and Iconv indicates, as represented by the following formula (2), converted current (A) obtained by dividing the sum of current (I) applied to an electroplated cell during the plating time (tp, sec) by the regeneration time (tr, sec) for reduction of the ferric ions in an electrolyte.





I
conv

=


∫

Idt
p



∫

dt
r

公开(公告)号：US20240093341A1

公开(公告)日：2024-03-21

申请号：US18519969

申请日：2023-11-27

Applicant: POSCO CO., LTD ,  KISWIRE LTD. ,  HONGDUK INDUSTRIAL CO., LTD.

Inventor： Tae-Chul Kim ,  Jong-Sung Kim ,  Sung-Hoon Kang ,  Gwang-Weon Yu ,  Il-Ryoung Sohn ,  Jong-Sang Kim

IPC: C23C2/06 ,  C22C18/00 ,  C23C2/02 ,  C23C2/26 ,  C23C2/38

CPC classification number: C23C2/06 ,  C22C18/00 ,  C23C2/024 ,  C23C2/26 ,  C23C2/38

Abstract: A plated steel wire, according to one aspect of the present invention, comprises: a base steel wire; and a zinc alloy plated layer. The zinc alloy plated layer comprises, in percentage by weight: 1.0% to 3.0% of AI; 1.0% to 2.0% of Mg; 0.5% to 5.0% of Fe; and the balance being Zn and unavoidable impurities, and includes a Zn/MgZn2/AI ternary eutectic structure, a Zn single-phase structure, and an Fe—Zn-AI-based crystal structure, wherein the Fe—Zn-AI-based crystal structure is formed adjacent to the base steel wire, and can have an average thickness of ⅕ to ½ with respect to an average thickness of the zinc alloy plated layer.