公开(公告)号：US20230416861A1

公开(公告)日：2023-12-28

申请号：US18037468

申请日：2021-11-18

Applicant: POSCO Co., Ltd

Inventor： Jun-Hak Pak ,  Hong-Seok Yang ,  Hak-Jun Kim ,  Seok-Jong Seo

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

CPC classification number: C21D9/46 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/002 ,  C22C38/001 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0263 ,  C21D6/005 ,  C21D6/008 ,  C21D1/18 ,  C21D1/84 ,  C21D2211/009 ,  C21D2211/005

Abstract: Provided are a hot rolled steel having small compressive strength loss after being processed into a steel pipe, and a manufacturing method therefor. The hot rolled steel of the present invention comprises, by wt %, 0.15% or less of carbon (C), 2.5% or less of silicon (Si), 2.0% or less of manganese (Mn), 0.05% or less of aluminum (Al), nitrogen (N) and boron (B) in a sum of 0.002 to 0.008%, and a balance of Fe and inevitable impurities, wherein 250

公开(公告)号：US20240018619A1

公开(公告)日：2024-01-18

申请号：US18265108

申请日：2021-12-03

Applicant: POSCO Co., Ltd

Inventor： Hong-Seok Yang ,  Jun-Hak Pak ,  Seok-Jong Seo

IPC: C21D9/46 ,  B21B3/02 ,  C22C38/12 ,  C22C38/04 ,  C22C38/02 ,  C21D8/02 ,  C21D6/00

CPC classification number: C21D9/46 ,  B21B3/02 ,  C22C38/12 ,  C22C38/04 ,  C22C38/02 ,  C21D8/0205 ,  C21D8/0226 ,  C21D6/005 ,  C21D6/008 ,  C21D2211/005 ,  C21D2211/009

Abstract: According to one aspect of the present invention, a hot-rolled steel sheet and a manufacturing method for same may be provided, wherein the hot-rolled steel sheet has excellent yield strength, vibration damping ratio, and low-temperature toughness, and thus has physical properties suitable for use in a hyper train tube.

公开(公告)号：US20230129303A1

公开(公告)日：2023-04-27

申请号：US18085061

申请日：2022-12-20

Applicant: POSCO Co., Ltd

Inventor： Hyun-Taek Na ,  Seok-Jong Seo

IPC: C21D9/46 ,  B23K11/00 ,  B23K31/02 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28

Abstract: The present invention relates to steel used for a sash component and the like of a vehicle and, more specifically, to a hot-rolled steel sheet for a high-strength electric resistance welded steel pipe having excellent expandability and a method for manufacturing same, the hot-rolled steel sheet having a smaller decrease in the strength of a welding heat-affected zone (HAZ) formed during electric resistance welding, in comparison with a base material.

公开(公告)号：US11851727B2

公开(公告)日：2023-12-26

申请号：US18085061

申请日：2022-12-20

Applicant: POSCO Co., Ltd

Inventor： Hyun-Taek Na ,  Seok-Jong Seo

IPC: C21D9/46 ,  B23K11/00 ,  B23K31/02 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  B23K103/04 ,  B23K101/06

CPC classification number: C21D9/46 ,  B23K11/002 ,  B23K31/027 ,  C21D8/0226 ,  C21D8/0263 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  B23K2101/06 ,  B23K2103/04 ,  C21D2211/002 ,  C21D2211/004 ,  C21D2211/005 ,  C21D2211/008

Abstract: The present invention relates to steel used for a sash component and the like of a vehicle and, more specifically, to a hot-rolled steel sheet for a high-strength electric resistance welded steel pipe having excellent expandability and a method for manufacturing same, the hot-rolled steel sheet having a smaller decrease in the strength of a welding heat-affected zone (HAZ) formed during electric resistance welding, in comparison with a base material.

公开(公告)号：US20230279518A1

公开(公告)日：2023-09-07

申请号：US18196261

申请日：2023-05-11

Applicant: POSCO CO., LTD

Inventor： Sung-Il Kim ,  Seok-Jong Seo

IPC: C21D9/46 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/32

CPC classification number: C21D9/46 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0263 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/32 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008

Abstract: The present invention relates to material utilized for heavy construction machinery, vehicle frames, reinforcing members, and the like, and more specifically to a high-strength steel sheet having excellent impact resistance and a method for manufacturing same.