公开(公告)号：EP3561109A1

公开(公告)日：2019-10-30

申请号：EP17883011.3

申请日：2017-12-12

申请人： Posco

发明人： SONG, Tae-Jin ,  KIM, Jeong-Eun ,  CHOI, Chang-Sik

IPC分类号： C22C38/04 ,  C22C38/12 ,  C22C38/02 ,  C22C38/06 ,  C21D8/02 ,  C21D9/46 ,  C22C38/14

摘要： One aspect of the present invention relates to a hot rolled steel sheet having excellent formability and fatigue properties comprising, in percentage by weight: 0.3-0.8% of C; 13-25% of Mn; 0.1-1.0% of V; 0.005-2.0% of Si; 0.01-2.5% of Al; 0.03% or less of P; 0.03% or less of S; 0.04% or less (excluding 0%) of N; and the balance being Fe and inevitable impurities, wherein, when viewed in a cross section in the thickness direction, the hot rolled steel sheet comprises, by area fraction, 20-70% of a non-recrystallized structure and 30-80% of a recrystallized structure.

公开(公告)号：EP3395978A1

公开(公告)日：2018-10-31

申请号：EP16879340.4

申请日：2016-12-21

申请人： Posco

发明人： CHO, Won-Tae ,  KIM, Tai-Ho ,  CHIN, Kwang-Geun ,  KIM, Young-Ha ,  SONG, Tae-Jin

IPC分类号： C22C38/04 ,  C22C38/00 ,  C22C38/14 ,  C22C38/58 ,  C22C38/54 ,  C22C38/48 ,  C22C38/46 ,  C22C38/44 ,  C21D6/00

CPC分类号： C21D6/00 ,  C21D6/005 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0247 ,  C21D9/46 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/04 ,  C22C38/14

摘要： The present invention relates to a high Mn steel sheet and a manufacturing method therefor, the steel sheet comprising, by wt%: 0-0.1% or less of C; 8-30% of Mn; 0.1% or less of P; 0.02% or less of S; 0.1% or less of N; 0-1.0% of Ti; and Fe and inevitable impurities, wherein a microstructure has epsilon martensite and austenite, and the average particle diameter of the martensite and the austenite is 2 µm or less.

公开(公告)号：EP4386103A1

公开(公告)日：2024-06-19

申请号：EP22856080.1

申请日：2022-08-01

申请人： POSCO Co., Ltd

发明人： SONG, Tae-Jin ,  HUR, Won

IPC分类号： C22C38/38 ,  C22C38/22 ,  C22C38/28 ,  C22C38/00 ,  C22C38/60 ,  C22C38/06 ,  C22C38/26 ,  C22C38/32 ,  C21D8/02

CPC分类号： B21C47/02 ,  C21D8/02 ,  C22C38/00 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C22C38/06 ,  C22C38/60 ,  C23G1/02

摘要： The present invention relates to a hot-rolled steel sheet, which can be suitably applied to an automobile chassis structure member and the like, and, more specifically, to a high-strength hot-rolled steel sheet having excellent formability, and a manufacturing method therefor.

公开(公告)号：EP3831597A1

公开(公告)日：2021-06-09

申请号：EP19839864.6

申请日：2019-07-08

申请人： POSCO

发明人： SONG, Tae-Jin ,  KOO, Min-Seo

IPC分类号： B32B15/18 ,  B32B38/00 ,  B23K20/04 ,  C21D8/02

摘要： An aspect of the present disclosure relates to a low-density clad steel sheet having excellent formability and fatigue properties, comprising a base material; and cladding materials provided on both side surfaces of the base material, wherein the base material is a lightweight steel sheet including, by weight, C: 0.3 to 1.0%, Mn: 4.0 to 16.0%, Al: 4.5 to 9.0%, and a remainder of Fe and inevitable impurities, and each of the cladding materials is martensitic carbon steel including, by weight, C: 0.1 to 0.45%, Mn: 1.0 to 3.0%, and a remainder of Fe and inevitable impurities.

公开(公告)号：EP3476966A1

公开(公告)日：2019-05-01

申请号：EP17815755.8

申请日：2017-06-23

申请人： Posco

发明人： SONG, Tae-Jin ,  PARK, Man-Young ,  CHO, Won-Tae

IPC分类号： C22C38/04 ,  C22C37/00 ,  C22C38/02 ,  C22C38/06 ,  C22C38/00 ,  C22C38/14 ,  C22C38/12 ,  C22C38/18 ,  C21D8/02

摘要： One aspect of the present invention relates to a clad steel plate having excellent strength and formability, comprising: a base metal; and a clad material provided on both sides of the base material, wherein the base metal is an austenitic high-manganese steel consisting of 0.3 to 1.4 wt.% of C, 12 to 25 wt.% of Mn, and the remainder being Fe and inevitable impurities, and wherein the clad material is martensitic carbon steel consisting of 0.09 to 0.4 wt.% of C, 0.3 to 4.5 wt.% of Mn, and the remainder being Fe and inevitable impurities.

公开(公告)号：EP4438762A1

公开(公告)日：2024-10-02

申请号：EP22898981.0

申请日：2022-11-22

申请人： POSCO Co., Ltd

发明人： SONG, Tae-Jin ,  RYU, Joo-Hyun ,  LEE, Je-Woong

IPC分类号： C22C38/38 ,  C22C38/34 ,  C22C38/22 ,  C22C38/28 ,  C22C38/32 ,  C22C38/60 ,  C22C38/00 ,  C21D8/02 ,  C23G1/02 ,  C23C2/06

CPC分类号： C22C38/00 ,  C22C38/22 ,  C22C38/34 ,  C22C38/32 ,  C23C2/06 ,  C22C38/38 ,  C23G1/02 ,  C22C38/28 ,  C21D8/02 ,  C22C38/60

摘要： The present invention relates to a hot-rolled steel sheet that can be suitably applied to an automobile chassis structure member or the like and, more specifically, to an ultrahigh-strength hot-rolled steel sheet having excellent formability and uniform material inside the steel sheet, and a manufacturing method therefor.

公开(公告)号：EP4219785A1

公开(公告)日：2023-08-02

申请号：EP21872801.2

申请日：2021-09-13

申请人： POSCO Co., Ltd

发明人： SONG, Tae-Jin ,  KIM, Sung-Il ,  CHOI, Chang-Sik

IPC分类号： C22C38/60 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C21D8/02 ,  C23C2/06

摘要： Provided are a hot rolled steel sheet having excellent crashworthiness and a method for manufacturing same. The hot rolled steel sheet of the present invention contains, in weight%, 0.05-0.13% of carbon (C), 0.2-2.0% of silicon (Si), 1.3-3.0% of manganese (Mn), 0.01-0.1% of aluminum (Al), 0.001-0.05% of phosphor (P), 0.001-0.05% of sulfur (S), 0.001-0.02% of nitrogen (N), and the balance being Fe and other inevitable impurities, and has a steel microstructure comprising, in area%, 55% or more of bainitic ferrite, 10% or more of a martensite/austenite composite phase (MA), the sum of the bainitic ferrite and the martensite/austenite composite phase (MA) being 95% or more, and the remaining total being less than 5% of granular ferrite, retained austenite, and carbides.

公开(公告)号：EP3835055A1

公开(公告)日：2021-06-16

申请号：EP19847405.8

申请日：2019-07-25

申请人： POSCO

发明人： KOO, Min-Seo ,  SONG, Tae-Jin

IPC分类号： B32B15/18 ,  B32B15/04 ,  B32B37/06 ,  B32B37/10 ,  B23K20/04 ,  C22C38/04 ,  C22C38/06 ,  B23K103/16 ,  B32B38/00

摘要： One aspect of the present invention relates to a low-specific-gravity clad steel sheet having excellent strength and plateability, the clad steel sheet comprising a base metal, and a clad material provided at both sides of the base metal, wherein the base metal is a ferrite-austenitic duplex lightweight steel sheet comprising, by wt%, 0.3-0.7% of C, 2.0-9.0% of Mn, 4.5-8.0% of Al and the balance of Fe and inevitable impurities, and the clad material is a ferrite carbon steel comprising, by wt%, 0.0005-0.2% of C, 0.05-2.5% of Mn and the balance of Fe and inevitable impurities.

公开(公告)号：EP3061840B1

公开(公告)日：2020-02-05

申请号：EP13896046.3

申请日：2013-12-24

申请人： POSCO

发明人： KIM, Sung-Kyu ,  CHIN, Kwang-Geun ,  SONG, Tae-Jin ,  KIM, Tai-Ho ,  CHO, Won-Tae ,  JEON, Sun-Ho

IPC分类号： C22C38/04 ,  C21D8/02 ,  C21D9/46 ,  B21B3/00

公开(公告)号：EP3061840A1

公开(公告)日：2016-08-31

申请号：EP13896046.3

申请日：2013-12-24

申请人： Posco

发明人： KIM, Sung-Kyu ,  CHIN, Kwang-Geun ,  SONG, Tae-Jin ,  KIM, Tai-Ho ,  CHO, Won-Tae ,  JEON, Sun-Ho

IPC分类号： C22C38/04 ,  C21D8/02 ,  C21D9/46 ,  B21B3/00

CPC分类号： C21D9/46 ,  B21B3/00 ,  C21D6/005 ,  C21D8/02 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0273 ,  C21D2211/001 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/002 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14

摘要： The present invention relates to a high-strength and high-manganese steel sheet suitable for an outer panel or a vehicle body of a transport vehicle and, more specifically, to a high-strength and high-manganese steel sheet having excellent vibration-proof properties and a method for producing the same.

摘要翻译： 本发明涉及一种高强度和高锰钢板适于外面板或运输车辆的车体，更具体地，涉及一种高强度和高锰钢板具有优异的防振性能上 及其制造方法。