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：US20240052519A1

公开(公告)日：2024-02-15

申请号：US18267014

申请日：2021-12-09

Applicant: POSCO Co., Ltd

Inventor： Hye-Jin Yoo ,  Chang-Se Byeon ,  Jung-Su Kim ,  Je-Hoon Baek ,  Kang-Min Lee

IPC: C25F3/02 ,  B32B15/08 ,  B32B15/18 ,  B32B37/06 ,  B32B38/10 ,  B32B37/10

CPC classification number: C25F3/02 ,  B32B15/08 ,  B32B15/18 ,  B32B37/06 ,  B32B38/10 ,  B32B37/10 ,  B32B2255/06 ,  B32B2255/205 ,  B32B2311/20 ,  B32B2311/30

Abstract: The present invention relates to a composite steel sheet having excellent adhesiveness, and a manufacturing method therefor, and, more particularly, to a light composite steel sheet obtained by forming microstructures on the surface and inside of a plated steel sheet, and then bonding same with a plastic layer to maximize adhesiveness.

公开(公告)号：US20240052451A1

公开(公告)日：2024-02-15

申请号：US18267674

申请日：2021-11-30

Applicant: POSCO CO., LTD

Inventor： Jae-Young CHO ,  Sang-Deok KANG ,  Kyung-Tae KIM

IPC: C21D9/46 ,  C22C38/14 ,  C22C38/12 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D8/02 ,  C21D6/00

CPC classification number: C21D9/46 ,  C22C38/14 ,  C22C38/12 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/002 ,  C22C38/001 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0278 ,  C21D6/005 ,  C21D6/008 ,  C21D2211/005

Abstract: The present invention relates to: a steel sheet for a seismic damper used to provide a structure with seismic resistance against earthquakes; and a manufacturing method of same, and more specifically, to a steel sheet which is for a seismic damper and has a superior toughness property, and a manufacturing method of same.

公开(公告)号：US20240051269A1

公开(公告)日：2024-02-15

申请号：US18268269

申请日：2021-12-20

Applicant: POSCO Co., Ltd

Inventor： Jungwoo Kim ,  Bongwoo Ha ,  Donggyu Lee ,  Taeyoung No ,  Gyeongryeol Park

IPC: B32B15/18 ,  B32B15/04 ,  B32B7/12 ,  B32B37/12 ,  B32B37/18 ,  H02K1/02

CPC classification number: B32B15/18 ,  B32B15/043 ,  B32B7/12 ,  B32B37/12 ,  B32B37/1284 ,  B32B37/18 ,  H02K1/02 ,  B32B2255/26 ,  B32B2255/06 ,  B32B2307/748 ,  B32B2309/12 ,  B32B2311/30 ,  B32B2457/00 ,  B32B2037/1253 ,  B32B2305/72 ,  B32B2307/206

Abstract: The present invention relates to an electrical steel sheet laminate, and provided is an electrical steel sheet laminate comprising: a plurality of electrical steel sheets; and polymer adhesive layers positioned between the electrical steel sheets, wherein the coating thickness of the polymer adhesive layers is 1.8-5.4 μm, the space factor of the laminate is 95.8-98.5%, and the following mathematical formula 1 is satisfied. [Mathematical Formula 1] 172.4≤space factor (%)×thickness (μm)≤531.


172.4≤space factor (%)×thickness(μm)≤531  [Equation 1]

公开(公告)号：US11897014B2

公开(公告)日：2024-02-13

申请号：US18096260

申请日：2023-01-12

Applicant: POSCO CO., LTD

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

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

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：US20240044032A1

公开(公告)日：2024-02-08

申请号：US18267010

申请日：2020-12-14

Applicant: POSCO Co., Ltd

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

IPC: C25D3/20

CPC classification number: C25D3/20

Abstract: The present invention relates to a solution for electroplating iron, comprising: iron ions comprising first iron ions and second iron ions; a complexing agent; and unavoidable impurities, wherein the amount of second iron ions among the iron ions is 5 to 60 wt %. According to the present invention, electroplating efficiency is high, there is no drop in electroplating efficiency due to a continuous plating operation, and sludge generation is prevented, and, thus, the plating solution is easily managed. Burning can be prevented even in a high current density operation, and, thus, a high-quality iron-plated layer can be achieved. The plating solution does not need to be replaced, as the concentration of second iron ions generated by a plating reaction is maintained to be constant, and, thus, the present invention is appropriate for a continuous plating process.

公开(公告)号：US20240043953A1

公开(公告)日：2024-02-08

申请号：US18267029

申请日：2021-12-17

Applicant: POSCO Co., Ltd

Inventor： Ki-Cheol Kang ,  Tae-Chul Kim ,  Myung-Soo Kim ,  Jong-Sang Kim

IPC: C21D9/46 ,  C22C38/38 ,  C22C38/34 ,  C22C38/32 ,  C22C38/28 ,  C22C38/60 ,  C22C38/26 ,  C22C38/22 ,  C22C38/14 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D8/02 ,  C21D1/74 ,  C21D1/18 ,  C21D6/00 ,  B32B15/01 ,  C23C2/28 ,  C23C2/06

CPC classification number: C21D9/46 ,  C22C38/38 ,  C22C38/34 ,  C22C38/32 ,  C22C38/28 ,  C22C38/60 ,  C22C38/26 ,  C22C38/22 ,  C22C38/14 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/008 ,  C22C38/002 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0273 ,  C21D8/0278 ,  C21D1/74 ,  C21D1/18 ,  C21D8/0294 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  B32B15/013 ,  C23C2/28 ,  C23C2/06 ,  C21D2221/02

Abstract: A hot-dip galvanized steel sheet according to one aspect of the present invention comprises a base steel sheet and a hot-dip galvanized layer formed on the surface of the base steel sheet, wherein the difference between the average of the Mn/Si values of surface oxides present on a surface portion, which is the region from the interface between the hot-dip galvanized layer and the base steel sheet to a depth of 15 nm, and the average of the Mn/Si values of internal oxides, which are present in the region from the interface to a depth of 50-100 nm, can be 0.5 or more. Mn and Si of each oxide mean the amounts (wt %) of Mn and Si components in the oxide, which are measured by EDS, and the average of Mn/Si values means the averaged value of the Mn/Si values measured for each oxide.

公开(公告)号：US20240035108A1

公开(公告)日：2024-02-01

申请号：US18265908

申请日：2021-12-17

Applicant: POSCO Co., Ltd

Inventor： Kyungjun Ko ,  Sangwoo Lee

IPC: C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C21D8/12 ,  C21D6/00 ,  C21D1/76 ,  H01F1/147

CPC classification number: C21D9/46 ,  C22C38/001 ,  C22C38/002 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C21D8/1233 ,  C21D8/1272 ,  C21D6/005 ,  C21D6/008 ,  C21D1/76 ,  H01F1/14766 ,  C21D2201/05 ,  C22C2202/02

Abstract: A method for manufacturing a grain oriented electrical steel sheet according to an embodiment of the present invention comprises the steps of: hot-rolling a slab to prepare a hot-rolled sheet, the slab containing, in weight %, Si: 2.5 to 4.0%, C: 0.03 to 0.09%, Al: 0.015 to 0.040%, Mn: 0.04 to 0.15%, S: 0.01% or less (0% excluded), N: 0.002 to 0.012%, and the balance being Fe and other inevitably incorporated impurities; cold-rolling the hot-rolled sheet to prepare a cold-rolled sheet; performing primary recrystallization annealing on the cold-rolled sheet; and performing secondary recrystallization annealing on the cold-rolled sheet that has been primary recrystallization annealed.

公开(公告)号：US20240035107A1

公开(公告)日：2024-02-01

申请号：US18265570

申请日：2021-11-18

Applicant: POSCO CO., LTD

Inventor： Dae-Woo KIM

IPC: C21D9/00 ,  C22C38/50 ,  C22C38/48 ,  C22C38/46 ,  C22C38/44 ,  C22C38/42 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D8/00 ,  C21D6/00 ,  C21D1/18 ,  C21D1/84

CPC classification number: C21D9/0081 ,  C22C38/50 ,  C22C38/48 ,  C22C38/46 ,  C22C38/44 ,  C22C38/42 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/002 ,  C21D8/005 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D1/18 ,  C21D1/84 ,  C21D2211/005 ,  C21D2211/002 ,  C21D2211/008

Abstract: The present invention relates to a highly thick steel material and a manufacturing method therefor and, more specifically, to a highly thick steel material that exhibits excellent low-temperature impact toughness after long-term PWHT although the steel sheet is thick, and a manufacturing method therefor.

公开(公告)号：US20240030465A1

公开(公告)日：2024-01-25

申请号：US18265879

申请日：2021-08-12

Applicant: POSCO Co., Ltd

Inventor： Jonghee Kim ,  Jinsuk Kim ,  Bosung Seo ,  Kwangmin Kim

IPC: H01M8/021 ,  H01M8/0228

CPC classification number: H01M8/021 ,  H01M8/0228

Abstract: This specification discloses a stainless steel for a fuel cell separator with excellent through-plane electrical conductivity and corrosion resistance. Disclosed a stainless steel for a fuel cell separator with excellent through-plane electrical conductivity and corrosion resistance, when the surface of stainless steel containing 15% or more of Cr by weight is measured by X-ray angle-resolved photoelectron spectroscopy using an Al-Kα X-ray source under the condition that the photoelectron take-off angle is 12°, following surface oxide element ratio (1) value may be 0.5 to 5, and following surface oxide element ratio (2) value may be 0.5 or less:











Sum
⁢

of
⁢

atomic
⁢

concentrations
⁢

(

at
⁢

%

)

⁢

of






Cr
⁢

elements
⁢

in
⁢

Cr
⁢

oxides
⁢

and
⁢

Cr
⁢

hydroxides








Sum
⁢

of
⁢

atomic
⁢

concentrations
⁢

(

at
⁢

%

)

⁢

of






Fe
⁢

elements
⁢

in
⁢

Fe
⁢

oxides
⁢

and
⁢

Fe
⁢

hydroxides








(
1
)
















Sum
⁢

of
⁢

atomic
⁢


concentration
⁡
(

at
⁢

%

)

⁢

of
⁢

metal
⁢

element
⁢

in
⁢

the






metal
⁢


oxide
(

M
⁢
O

)









Sum
⁢

of
⁢

atomic
⁢

concentration
⁢

(

at
⁢

%

)

⁢

of
⁢

metal
⁢

elements
⁢

in






all
⁢

oxides
⁢

and
⁢

hydroxides








(
2
)









wherein Cr oxides mean Cr3O4, Cr2O3, CrO2 or CrO3, Cr hydroxides mean CrOOH, Cr(OH)2 or Cr(OH)3, and Fe oxides mean FeO, Fe2O3 or Fe3O4, and Fe hydroxides mean FeOOH,
wherein the total oxides and hydroxides comprise the Cr oxides, the Cr hydroxides, the Fe oxides, the Fe hydroxides, and metal oxides (MO), and the metal oxides (MO) comprise mixed oxides, and M is Ti, Nb, Mn, Si, V or a combination thereof excluding Cr and Fe, and O means oxygen.