公开(公告)号：US20240360541A1

公开(公告)日：2024-10-31

申请号：US18688709

申请日：2022-09-27

Applicant: POSCO CO., LTD

Inventor： Tae-Chul Kim ,  Sung-Joo Kim ,  Myung-Soo Kim ,  Bong-Hwan Yoo ,  Yong-Kyun Cho ,  Il-Ryoung Sohn

IPC: C23C2/06 ,  B32B15/01 ,  C22C18/04 ,  C23C2/20 ,  C23C2/28 ,  C23C2/40

CPC classification number: C23C2/06 ,  B32B15/013 ,  C22C18/04 ,  C23C2/20 ,  C23C2/29 ,  C23C2/40

Abstract: The present invention provides a Zn—Mg—Al plated steel sheet having excellent in corrosion resistance and bendability, and a method for manufacturing same. And more specifically, the present invention provides a Zn—Mg—Al-based plated steel sheet having excellent in corrosion resistance, bendability, and plating adhesion, and a method for manufacturing the same.

公开(公告)号：US20240352563A1

公开(公告)日：2024-10-24

申请号：US18681397

申请日：2022-11-01

Applicant: POSCO CO., LTD

Inventor： Tae-Il SO ,  Sang-Deok KANG

IPC: C22C38/16 ,  C21D8/02 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14

CPC classification number: C22C38/16 ,  C21D8/0205 ,  C21D8/0226 ,  C21D9/46 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C21D2211/005 ,  C21D2211/009

Abstract: The present invention relates to: a steel material having high strength and excellent impact toughness, the steel material being usable for a land wind power generator and the like; and a method for manufacturing same.

公开(公告)号：US12123094B2

公开(公告)日：2024-10-22

申请号：US17297757

申请日：2019-11-29

Applicant: POSCO CO., LTD

Inventor： Jin-Keun Oh ,  Seong-Woo Kim ,  Yeol-Rae Cho ,  Sang-Heon Kim

IPC: B32B15/10 ,  B32B15/01 ,  C21D9/48 ,  C22C21/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/28 ,  C22C38/32 ,  C23C2/12 ,  C23C2/28 ,  C23C2/40

CPC classification number: C23C2/12 ,  B32B15/012 ,  C21D9/48 ,  C22C21/02 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/28 ,  C22C38/32 ,  C23C2/28 ,  C23C2/29 ,  C23C2/40

Abstract: The present invention provides an aluminum-based plated steel plate used in hot-press forming, the steel plate comprising: a base steel plate; and a plating layer formed on the base steel plate, wherein the plating layer comprises: an alloying layer formed on the surface of the base steel plate and including one or more of Fe 3Al, FeAl(Si), Fe 2Al 5, and FeAl 3; and an aluminum layer formed on the alloying layer and having a thickness less than 10% of the thickness of the plating layer, and the plating layer has a thickness of 5-20 μm and an oxygen content of 10 weight % or less, as measured by GDS, at a depth of 0.1 μm from the surface of the plating layer.

公开(公告)号：US12123066B2

公开(公告)日：2024-10-22

申请号：US16347704

申请日：2017-11-07

Applicant: POSCO CO., LTD ,  POSTECH ACADEMY-INDUSTRY FOUNDATION

Inventor： Sea-Woong Lee ,  Bruno C. De Cooman ,  Kyoo-Young Lee ,  Eun-Jung Seo ,  Seon-Jong Lee ,  Joo-Hyun Ryu ,  Won-Hwi Lee

IPC: C21D9/46 ,  C21D6/00 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/38 ,  C23C2/02 ,  C23C2/06 ,  C23C2/28 ,  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 ,  C22C38/12 ,  C22C38/38 ,  C23C2/0224 ,  C23C2/06 ,  C23C2/28 ,  C23C2/40 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008

Abstract: One aspect of the present invention relates to an ultrahigh-strength steel sheet having an excellent yield ratio, comprising, by wt %, 0.3-0.5% of C, 2.0% (excluding 0%) of Si, 3.0-6.5% of Mn, 0.02% or less of P, 0.01% or less of S, 0.01-3.0% of Al, 0.02% or less (excluding 0%) of N, and the balance of Fe and other inevitable impurities, and a microstructure comprises 5-30% of remaining austenite by area fraction and comprises 5% or less of secondary martensite.

公开(公告)号：US20240336987A1

公开(公告)日：2024-10-10

申请号：US18293195

申请日：2022-11-25

Applicant: POSCO Co., Ltd

Inventor： Hak-Cheol LEE

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

CPC classification number: C21D8/0226 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C21D2211/001 ,  C21D2211/002 ,  C22C2202/00

Abstract: The present invention relates to a steel plate for use in ships and the like, which has excellent toughness in a heat-affected zone (HAZ), even when a steel material having high strength and high ductility is welded with a certain amount of heat input or more, and to a method for manufacturing same.

公开(公告)号：US20240301237A1

公开(公告)日：2024-09-12

申请号：US18268806

申请日：2021-12-16

Applicant: POSCO Co., Ltd

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

IPC: C09D175/08 ,  B32B7/12 ,  B32B15/04 ,  B32B15/18 ,  C08G18/48 ,  C08G18/72 ,  C08G18/73 ,  C08G18/76 ,  C08K3/04 ,  C08K3/22 ,  C08K3/36 ,  C09D7/61 ,  H01F1/147

CPC classification number: C09D175/08 ,  B32B7/12 ,  B32B15/043 ,  B32B15/18 ,  C08G18/4825 ,  C08G18/722 ,  C08G18/73 ,  C08G18/7614 ,  C08G18/7671 ,  C08K3/04 ,  C08K3/22 ,  C08K3/36 ,  C09D7/61 ,  H01F1/14791 ,  B32B2255/06 ,  B32B2255/26 ,  B32B2264/1021 ,  B32B2264/1022 ,  B32B2264/108 ,  B32B2307/748 ,  C08K2003/2241

Abstract: The present invention relates to an electrical steel sheet and a laminate thereof, and provided is an electrical steel sheet including: an electrical steel sheet, and a polyurethane coating layer positioned on the electrical steel shoot, in which the rebound clastic modulus of the polyurethane coating layer is 5% to 30%.

公开(公告)号：US20240287362A1

公开(公告)日：2024-08-29

申请号：US18268780

申请日：2021-12-16

Applicant: POSCO Co., Ltd

Inventor： Bongwoo HA ,  Jungwoo KIM ,  Donggyu LEE ,  Eunjung KO ,  Taeyoung NO ,  Gyeongryeol PARK

IPC: C09J175/04 ,  B32B7/12 ,  B32B15/04 ,  B32B15/18 ,  C08G18/48 ,  C08G18/72

CPC classification number: C09J175/04 ,  B32B7/12 ,  B32B15/043 ,  B32B15/18 ,  C08G18/4825 ,  C08G18/724 ,  B32B2255/06 ,  B32B2255/26 ,  B32B2307/748

Abstract: The present disclosure relates to a bonding composition for an electrical steel sheet, and a steel sheet and a laminate to which same is applied, the bonding composition comprising polyurethane formed by reacting a diisocyanate monomer and a polyol, wherein the diisocyanate monomer can comprise an aromatic diisocyanate monomer and an aliphatic diisocyanate monomer.

公开(公告)号：US20240263291A1

公开(公告)日：2024-08-08

申请号：US18567663

申请日：2022-06-10

Applicant: POSCO CO., LTD

Inventor： Sung-Joo Kim ,  Il-Ryoung Sohn ,  Tae-Chul Kim ,  Kwang-Won Kim ,  Sang-Tae Han ,  Myung-Soo Kim ,  Yong-Kyun Cho

IPC: C23C2/06 ,  C23C2/28 ,  C23C2/40

CPC classification number: C23C2/06 ,  C23C2/29 ,  C23C2/40

Abstract: One aspect of the present invention provides a plated steel sheet and a manufacturing method therefor, the plated steel sheet comprising: a base steel sheet; a Zn—Mg—Al-based plated layer provided on at least one surface of the base steel sheet; and an Fe—Al-based inhibition layer provided between the base steel sheet and the Zn—Mg—Al-based plated layer, wherein, on the surface of the Zn—Mg—Al-based plated layer, the total area fraction of an Al single phase and MgZn2 phase is 45-60%, and the area ratio of the MgZn2 phase to the Al single phase is 1.2-3.3.

公开(公告)号：US20240221982A1

公开(公告)日：2024-07-04

申请号：US18287566

申请日：2022-08-09

Applicant: POSCO Co., Ltd

Inventor： Junesoo Park ,  Jaewan Hong ,  Dae Hyun Song

IPC: H01F1/147 ,  C21D6/00 ,  C21D8/12 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/14 ,  C22C38/16

CPC classification number: H01F1/14783 ,  C21D6/005 ,  C21D6/008 ,  C21D8/1222 ,  C21D8/1233 ,  C21D8/1261 ,  C21D8/1283 ,  C21D9/46 ,  C22C38/001 ,  C22C38/002 ,  C22C38/004 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/14 ,  C22C38/16 ,  C22C2202/02

Abstract: An exemplary embodiment of the present invention provides a non-oriented electrical steel sheet and a method for manufacturing same. The non-oriented electrical steel sheet comprises, by wt %, 2.5-4% of Si, 0.1-1.0% of Mn, 0.001-0.005% of S, 0.002-0.01% of Cu, and the remainder of Fe and inevitable impurities, wherein FGS (average grain size of grains in the lower 10% or less based on grain size among total grains)≥15 μm.

公开(公告)号：US20240200175A1

公开(公告)日：2024-06-20

申请号：US18287975

申请日：2022-12-19

Applicant: POSCO Co., Ltd

Inventor： Hunju Lee ,  Su-Yong Shin ,  Yunsu Kim

IPC: C22C38/02 ,  C21D6/00 ,  C21D8/12 ,  C21D9/46 ,  C22C38/00 ,  C22C38/04 ,  C22C38/06 ,  C22C38/18 ,  C22C38/60

CPC classification number: C22C38/02 ,  C21D6/008 ,  C21D8/1222 ,  C21D8/1233 ,  C21D8/1261 ,  C21D8/1272 ,  C21D9/46 ,  C22C38/002 ,  C22C38/004 ,  C22C38/04 ,  C22C38/06 ,  C22C38/18 ,  C22C38/60

Abstract: A non-oriented electrical steel sheet includes by wt %, Si: 3.0 to 4.0%, Al: 0.1 to 1.5%, Mn: 0.1 to 0.5%, Cr: 2 to 20% of Mn content, a sum of Sn and Sb: 0.006 to 0.1%, C: 0.0010 to 0.0050%, and 0.0003 to 0.0050% of at least one of N, S, Ti, Nb, and V, and balance being Fe and unavoidable impurities, in which an area fraction of a grain having a grain diameter which is 10% or less of a thickness of the steel sheet is 0.5% or more, a number fraction of the grain is 20% or more, and an average grain diameter from a central layer to a surface layer in a thickness direction of the steel sheet satisfies a relationship of D(surface)/D(center)≥0.6.