公开(公告)号：US20230332281A1

公开(公告)日：2023-10-19

申请号：US18213539

申请日：2023-06-23

Applicant: POSCO CO., LTD

Inventor： Sung-Il Kim ,  Hee-Sung Kang ,  Hyun-Seok Tak

IPC: C22C38/22 ,  C21D8/02 ,  C21D9/46 ,  C22C38/04

CPC classification number: C22C38/22 ,  C21D8/0226 ,  C21D8/0257 ,  C21D9/46 ,  C22C38/04 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008

Abstract: The present disclosure relates to a hot-rolled steel sheet utilized as material for heavy machinery, vehicle frames, and the like, and more specifically to a high-strength hot-rolled steel sheet having excellent bendability and low-temperature toughness and a method for manufacturing same.

公开(公告)号：US20230287535A1

公开(公告)日：2023-09-14

申请号：US18199740

申请日：2023-05-19

Applicant: POSCO CO., LTD

Inventor： Seong-Woo KIM ,  Jin-Keun OH ,  Yeol-Rae CHO

IPC: C21D9/46 ,  B32B15/01 ,  C21D6/00 ,  C21D8/02 ,  C22C21/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/06 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C23C2/12 ,  C23C2/40

CPC classification number: C21D9/46 ,  B32B15/012 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0226 ,  C22C21/02 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/06 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C23C2/12 ,  C23C2/40 ,  C21D2211/001 ,  C21D2211/005 ,  C21D2211/008 ,  C21D2211/009 ,  Y10T428/12757

Abstract: One aspect of the present invention relates to a plated steel sheet for hot press forming, having an excellent impact property.

公开(公告)号：US20230286030A1

公开(公告)日：2023-09-14

申请号：US18019639

申请日：2021-10-19

Applicant: POSCO Co., Ltd

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

IPC: B21D22/02 ,  C22C38/38 ,  C22C38/32 ,  C22C38/60 ,  C22C38/28 ,  C22C38/04 ,  C22C38/06 ,  C22C38/02 ,  C22C38/00 ,  C22C33/04 ,  C21D9/00 ,  C21D8/02 ,  C21D9/46 ,  C21D6/00

CPC classification number: B21D22/022 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0263 ,  C21D8/0278 ,  C21D9/0081 ,  C21D9/46 ,  C22C33/04 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C22C38/60

Abstract: Provided are a plated steel sheet for hot press forming including: a base steel sheet containing, by wt%, 0.14 to 0.5% of C, 0.001 to 1% of Si, 0.3 to 4% of Mn, 0.001 to 0.015% of P, 0.0001 to 0.02% of S, 0.001 to 0.1% of Al, 0.001 to 1% of Cr, 0.001 to 0.02% of N, 0.1% or less of Ti, 0.01% or less of B, 0.005 to 0.1% of Sb, and a balance of Fe and unavoidable impurities; an aluminum or aluminum alloy plating layer provided on at least one surface of the base steel sheet; and a Sb-rich layer provided between the base steel sheet and the plating layer, wherein the plated steel sheet for hot press forming satisfies the following Relational Expressions 1-1 and 1-2, a hot press formed member manufactured using the same, and methods for manufacturing the plated steel sheet for hot press forming and the hot press formed member.









S

b

max




S

b

c
o
a
t




≥
1.2




­­­[Relational Expression 1-1]


















S

b

max


−
S

b

c
o
a
t





2

×
Δ
t
≥
0.008




­­­[Relational Expression 1-2]







[In Relational Expressions 1-1 and 1-2, Sbcoat represents an average content of Sb in the plating layer, and a unit thereof is wt%, Sbmax represents a maximum value of a content of Sb in the Sb-rich layer, and a unit thereof is wt%, and Δt represents a linear distance from a boundary between the plating layer and the Sb-rich layer to a point where Sbmax is measured, and a unit thereof is µm.]

公开(公告)号：US20230268106A1

公开(公告)日：2023-08-24

申请号：US18012863

申请日：2021-01-15

Applicant: POSCO CO., LTD.

Inventor： Hyungjin Kim ,  Seil Lee ,  Jeasook Chung

IPC: H01F1/147 ,  H01F1/24 ,  B22F9/08

CPC classification number: H01F1/14766 ,  H01F1/24 ,  B22F9/082 ,  B22F2301/35 ,  B22F2304/10

Abstract: Disclosed are a soft magnetic iron-based powder, a preparation method therefor, and a soft magnetic component, which are applicable to various industrial fields such as a core of a motor. According to an embodiment of the disclosed soft magnetic iron-based powder, the powder comprises, in wt %, more than 2% of Si, more than 0.02% of Al, more than 0.05% of Mn, more than 0% and less than 0.1% of O, and the balance being Fe and unavoidable impurities, and satisfies [Si]/[Al]>2, wherein the difference in [Si]+[Al]+[Mn] between D10 and D90 may be less than 10 wt %. [Si], [Al], and [Mn] represent wt % of respective elements.

公开(公告)号：US20250163559A1

公开(公告)日：2025-05-22

申请号：US19017399

申请日：2025-01-10

Applicant: POSCO CO., LTD

Inventor： Suk-Kyu Lee ,  Il-Jeong Park ,  Myung-Soo Kim

IPC: C23C2/12 ,  B32B15/01 ,  C22C21/10 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C23C2/02 ,  C23C2/20 ,  C23C2/28 ,  C23C2/40

Abstract: The present disclosure relates to a manufacture for manufacturing an Al—Zn alloy plated steel sheet having high hot workability and corrosion resistance.

公开(公告)号：US20250137085A1

公开(公告)日：2025-05-01

申请号：US18691485

申请日：2022-09-23

Applicant: POSCO CO., LTD

Inventor： Min-Seo KOO ,  Eun-Young KIM ,  Sang-Hyun KIM

IPC: C21D9/46 ,  C21D6/00 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  C22C38/58 ,  C22C38/60

Abstract: Provided is an ultra-high strength cold-rolled steel sheet having excellent hole expandability and a method for manufacturing same and, more specifically, to an ultra-high strength cold-rolled steel sheet having excellent hole expandability which can be mainly used for structural members and to ensure safety in the event of an automobile collision, and to a method for manufacturing same.

公开(公告)号：US12285824B2

公开(公告)日：2025-04-29

申请号：US18421516

申请日：2024-01-24

Applicant: POSCO Co., Ltd.

Inventor： HyunWoo Jin ,  Ning Ma ,  Adnan Ozekcin ,  Andrew J. Wasson ,  Douglas P. Fairchild ,  IiWook Han ,  Sangchul Lee ,  Bongkeun Lee ,  Jongsub Lee

IPC: B23K35/02 ,  B23K9/18 ,  B23K9/23 ,  B23K35/30 ,  C22C38/00 ,  C22C38/02 ,  C22C38/42 ,  C22C38/44 ,  C22C38/58

Abstract: Methods of welding high manganese steel, the methods comprising: supplying at least one piece of high manganese steel; supplying the metal cored wire comprising a steel sheath with a core comprising powders of certain metal and carbon percentages and at least one of: i: sulfur in an amount less than 0.3 wt. %; or ii. phosphorous in an amount less than 0.03 wt. %; or a combination thereof; and the balance with iron; submerging the at least one piece of high manganese steel in a slag and arc stabilizer; and applying a current to the metal cored wire to produce a liquid alloy steel composition on the at least one piece of high manganese steel.

公开(公告)号：US12269081B2

公开(公告)日：2025-04-08

申请号：US18019639

申请日：2021-10-19

Applicant: POSCO Co., Ltd

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

IPC: C22C38/02 ,  B21D22/02 ,  B32B15/01 ,  C21D6/00 ,  C21D8/02 ,  C21D9/00 ,  C21D9/46 ,  C22C33/04 ,  C22C38/00 ,  C22C38/04 ,  C22C38/06 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C22C38/60 ,  C23C2/02

Abstract: Provided are a plated steel sheet for hot press forming including: a base steel sheet containing, by wt %, 0.14 to 0.5% of C, 0.001 to 1% of Si, 0.3 to 4% of Mn, 0.001 to 0.015% of P, 0.0001 to 0.02% of S, 0.001 to 0.1% of Al, 0.001 to 1% of Cr, 0.001 to 0.02% of N, 0.1% or less of Ti, 0.01% or less of B, 0.005 to 0.1% of Sb, and a balance of Fe and unavoidable impurities; an aluminum or aluminum alloy plating layer provided on at least one surface of the base steel sheet; and a Sb-rich layer provided between the base steel sheet and the plating layer, wherein the plated steel sheet for hot press forming satisfies the following Relational Expressions 1-1 and 1-2, a hot press formed member manufactured using the same, and methods for manufacturing the plated steel sheet for hot press forming and the hot press formed member.
[Relational Expression 1-1] Sb max Sb coat ≥ 1.2 [Relational Expression 1-2] ( S ⁢ b max - Sb c ⁢ o ⁢ a ⁢ t ) 2 × Δ ⁢ t ≥ 0. 0 ⁢ 0 ⁢ 8 [In Relational Expressions 1-1 and 1-2, Sbcoat represents an average content of Sb in the plating layer, and a unit thereof is wt %, Sbmax represents a maximum value of a content of Sb in the Sb-rich layer, and a unit thereof is wt %, and Δt represents a linear distance from a boundary between the plating layer and the Sb-rich layer to a point where Sbmax is measured, and a unit thereof is μm.]

公开(公告)号：US20250112235A1

公开(公告)日：2025-04-03

申请号：US18977261

申请日：2024-12-11

Applicant: POSCO CO., LTD ,  RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY

Inventor： Jae Myung Lee ,  Jun-Kyu Ahn ,  Sang Won Kim ,  Heok Yang

IPC: H01M4/525 ,  C01D15/02 ,  C01G53/00 ,  H01M4/02 ,  H01M10/0525

Abstract: The present invention relates to a lithium compound, a nickel-based cathode active material, a method for preparing lithium oxide, a method for preparing a nickel-based cathode active material, and a secondary battery using same. The lithium compound includes primary particles of Li2O having an average particle diameter (D50) of less than or equal to 5 μm; and secondary particles composed of the primary particles.

公开(公告)号：US20250079543A1

公开(公告)日：2025-03-06

申请号：US18284767

申请日：2022-03-29

Applicant: POSCO Holdings Inc. ,  POSCO CO., LTD

Inventor： Sang Woo HAN ,  Wan-Yi KIM ,  Sanghyeon YOON ,  Hyunjin CHO ,  Sungsuk JUNG

IPC: H01M10/54 ,  C22B1/00 ,  C22B1/24 ,  C22B7/00

Abstract: The present invention relates to a processing method for reusing a waste battery, the processing method comprising the steps of: cooling, for a minimum cooling time satisfying formula 1 below, a battery pack comprising: as a unit cell, a battery that includes a plurality of lithium ions, and freezing same; and crushing the frozen battery pack. minimum ⁢ cooling ⁢ time = A × W 0.33 ( A = 4 × e ( - 0.02 × dT ) , W = battery ⁢ weight ⁢ ( Kg ) , dT = 
 ❘ "\[LeftBracketingBar]" external ⁢ cooling ⁢ temperature - 
 target ⁢ temperature ❘ "\[RightBracketingBar]" , ❘ "\[LeftBracketingBar]" ❘ "\[RightBracketingBar]" ⁢ means ⁢ absolute ⁢ value )