公开(公告)号：US20230158559A1

公开(公告)日：2023-05-25

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：US20230092345A1

公开(公告)日：2023-03-23

申请号：US17992245

申请日：2022-11-22

Applicant: POSCO Co., Ltd

Inventor： Sang-Ho HAN ,  Je-Woong LEE

IPC: C22C38/04 ,  C22C38/18 ,  C23C2/06 ,  C23C2/28 ,  C23C2/40

Abstract: Provided is a steel sheet by weight percentage (wt %), carbon (C): 0.005 to 0.08%, manganese (Mn): 1.25% or less (excluding 0%), phosphorus (P): 0.03% or less (excluding 0%), sulfur (S): 0.01% or less (excluding 0%), nitrogen (N): 0.01% or less (excluding 0%), soluble aluminum (sol.Al): 0.01 to 0.06%, chromium (Cr): 1.15 to 2.5%, antimony (Sb): 0.1% or less (excluding 0%), at least one selected from the group consisting of nickel (Ni): 0.3% or less (excluding 0%), silicon (Si): 0.3% or less (excluding 0%), molybdenum (Mo): 0.2% or less (excluding 0%), and boron (B): 0.003% or less (excluding 0%), and a remainder of iron (Fe) and other unavoidable impurities, satisfying Expression 1: 1.3≤Mn(wt %)+Cr(wt %)/1.5+Sb(wt %)≤2.7, where Mn, Cr, and Sb refer to contents (wt %) of corresponding elements, respectively; and 1 to 5% of martensite and a remainder of ferrite by an area percentage (area %).

公开(公告)号：US20230080110A1

公开(公告)日：2023-03-16

申请号：US17992240

申请日：2022-11-22

Applicant: POSCO Co., Ltd

Inventor： Yeon-Sang AHN ,  Chang-Hyo SEO ,  Kang-Hyun CHOI ,  Eul-Yong CHOI

IPC: C21D9/46 ,  C21D1/26 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/32 ,  C22C38/60 ,  C23C2/06

Abstract: Provided is a method of manufacturing a high strength steel sheet having excellent workability, including: reheating a steel slab; hot-rolling the reheated steel slab at an Ar3 transformation point or higher; coiling in a temperature range of 400 to 700° C.; primary cooling at a cooling rate of 0.1° C./s or less to room temperature; producing a cold rolled steel sheet at a cold reduction ratio of 40 to 70%; continuously annealing the cold rolled steel sheet in a temperature range of Ac1+30° C. to Ac3−20° C.; secondary cooling at a cooling rate of 10° C./s or less to 630 to 670° C.; third cooling to 400 to 500° C. at a cooling rate of 5° C./s or more in a hydrogen; maintaining for 70 seconds or more; hot-dip galvanizing; and performing a final cooling to Ms or less at a cooling rate of 1° C./s or more.

公开(公告)号：US20040153196A1

公开(公告)日：2004-08-05

申请号：US10718489

申请日：2003-11-20

Applicant: POSCO CO., LTD. ,  TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION

Inventor： Cheol-Jae Park ,  Seong-Cheol Hong ,  Kwan-Soo Kim ,  Kyu-Bum Han ,  Young-Jun Jo ,  Seong-Gap Choi ,  Wakamiya Yoshinori ,  Nitta Isoko ,  Inami Haruki

IPC: G06F019/00

CPC classification number: G05B23/0235 ,  B21B37/165

Abstract: The present invention relates to an apparatus and method for diagnosing faults in hot strip finishing rolling, which diagnoses thickness faults in hot strip finishing rolling, using preset data and real-time data on rolling and control conditions, equation models representing control and physical phenomena and a database constructed based on operation experiences. The present invention comprises: a Supervisory Control Computer (SCC); an actually measured data collection unit; an exit side thickness gauge loaded-on determination unit; a part identification unit; an on-gauge ratio calculation unit; a primary fault determination unit; a secondary fault determination unit; and a confidence rate evaluation unit.

Abstract translation: 本发明涉及一种用于诊断热轧带钢轧制中的故障的装置和方法，其使用预设数据和轧制和控制条件的实时数据来诊断热轧带钢轧制中的厚度缺陷，表示控制和物理现象的方程模型，以及 基于操作经验构建的数据库。 本发明包括：监控计算机（SCC）; 实际测量的数据收集单元; 出口侧厚度计装载确定单元; 零件识别单元; 标尺比计算单位; 主故障确定单元; 次级故障确定单元; 和置信率评估单元。

公开(公告)号：US20250163585A1

公开(公告)日：2025-05-22

申请号：US18875631

申请日：2023-06-16

Applicant: POSCO CO., LTD

Inventor： Kang-Min Lee ,  Hyeon-Seok Hwang ,  Kkoch-Nim Oh ,  Sea-Woong Lee ,  Ji-Eun Oh ,  Yong-Kyun Cho

IPC: C23C28/02 ,  C21D1/26 ,  C21D1/76 ,  C21D6/00 ,  C21D8/02 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C23C2/02 ,  C23C2/06 ,  C23C2/12 ,  C23C2/40 ,  C25D3/20 ,  C25D5/50 ,  C25D7/06

Abstract: The present invention relates to a steel sheet that can be used in automobiles, etc., and relates to a steel sheet that can ensure improved plating characteristics, and a manufacturing method therefor.

公开(公告)号：US20250154620A1

公开(公告)日：2025-05-15

申请号：US19024595

申请日：2025-01-16

Applicant: POSCO CO., LTD

Inventor： Soon-Taik Hong

IPC: C21D9/46 ,  C21D1/18 ,  C21D6/00 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08

Abstract: Provided are a steel plate for a pressure vessel with excellent cryogenic toughness and elongation resistance, and a manufacturing method thereof. The steel plate for a pressure vessel of the present invention comprises, in weight %, 0.05 to 0.15% of C; 0.20 to 0.40% of Si; 0.3 to 0.6% of Mn; 0.001 to 0.05% of Al; 0.012% or less of P; 0.015% or less of S; 4.0 to 5.0% of Ni; 0.001 to 0.10% of In; and the balance being Fe and unavoidable impurities, wherein a steel microstructure consists of 15 to 80 area % of tempered bainite and the balance being tempered martensite.

公开(公告)号：US20250146115A1

公开(公告)日：2025-05-08

申请号：US19016248

申请日：2025-01-10

Applicant: POSCO CO., LTD

Inventor： Heung-Yun KIM ,  Do-Kyeong HAN ,  Myung-Soo KIM

IPC: C23C2/06 ,  B32B15/01 ,  B32B15/04 ,  B32B15/18 ,  C22C18/00 ,  C22C18/04 ,  C23C2/00 ,  C23C2/16 ,  C23C2/20 ,  C23C2/26 ,  C23C2/32 ,  C23C2/40 ,  C23C28/00 ,  C23C28/02 ,  C23C30/00

Abstract: Provided is a zinc alloy-plated steel material having excellent corrosion resistance and surface qualities. The steel material includes: a base steel; a zinc alloy-plating layer formed on the base steel, wherein the zinc alloy-plating layer comprises, by weight %, 8 to 25% of aluminum (Al), 4 to 12% of magnesium (Mg), and a balance of zinc (Zn) and inevitable impurities; and a polygonal solidification phase formed in a surface of the zinc alloy-plating layer and having a substantially straight boundary line between the polygonal solidification phase and a microstructure surrounding the polygonal solidification phase. The substantially straight boundary line forms an angle with an adjacent substantially straight boundary line, and an area fraction occupied by the polygonal solidification phase on the surface of the zinc alloy-plating layer is 20 to 90%.

公开(公告)号：US20250066885A1

公开(公告)日：2025-02-27

申请号：US18721099

申请日：2022-12-01

Applicant: POSCO CO., LTD

Inventor： Kyungjun Ko ,  Sangwoo Lee

IPC: C22C38/02 ,  C21D6/00 ,  C21D8/12 ,  C21D9/46 ,  C22C38/00 ,  C22C38/04 ,  C22C38/06 ,  C22C38/24 ,  C22C38/28 ,  C22C38/60 ,  C23C8/26

Abstract: A method for manufacturing a grain-oriented electrical steel sheet, according to one embodiment of the present invention, comprises the steps of: hot rolling a slab so as to manufacture a hot rolled sheet, the slab comprising, by wt %, 2.5-4.0% of Si, 0.03-0.09% of C, 0.015-0.040% of Al, 0.04-0.15% of Mn, 0.01% or less of S (excluding 0%), 0.002-0.012% of N, 0.01-0.05% of Sb, 0.03-0.1% of Sn, 0.05-0.2% of Cr and the balance of Fe and inevitable impurities; cold rolling the hot rolled sheet so as to manufacture a cold rolled sheet; and performing secondary recrystallization annealing on the steel sheet having undergone primary recrystallization annealing.

公开(公告)号：US12226976B2

公开(公告)日：2025-02-18

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

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：US20250051888A1

公开(公告)日：2025-02-13

申请号：US18719145

申请日：2022-12-20

Applicant: POSCO CO., LTD

Inventor： Jaewan Hong ,  Hyung Don Joo ,  Junesoo Park

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

Abstract: A non-oriented electrical steel sheet according to one embodiment of the present invention comprises, by wt %, 1.4-3.0% of Si; 0.001-1.5% of Mn; and 0.001-0.2% of Al, with the remainder of Fe and inevitable impurities, wherein a thickness deviation in the direction perpendicular to a rolling direction is 1.5 μm or less per 5 mm length, and a thickness derivation in the rolling direction is 10 μm or less per 1000 m length.