公开(公告)号：EP3974556A1

公开(公告)日：2022-03-30

申请号：EP21193240.5

申请日：2018-10-11

申请人： POSCO

发明人： HA, Yu-Mi ,  JUNG, Young-Deok ,  KANG, Sang-Deok ,  LEE, Un-Hae ,  KIM, Yong-Jin ,  KIM, Sung-Kyu ,  KIM, Young-Ju

IPC分类号： C22C38/38 ,  C22C38/20 ,  C22C38/28 ,  C22C38/32 ,  C22C38/02 ,  C22C38/06 ,  C22C38/00 ,  C21D9/46 ,  C21D8/02 ,  C21D8/00 ,  C21D6/00 ,  C21D7/13

摘要： The present invention provides: a high manganese steel for a low temperature; and a manufacturing method therefor, the high manganese steel comprising 0.3-0.8 wt% of C, 18-26 wt% of Mn, 0.01-1 wt% of Si, 0.01-0.5 wt% of Al, 0.1 wt% or less of Ti (excluding 0%), 1-4.5 wt% of Cr, 0.1-0.9 wt% of Cu, 0.03 wt% or less of S (excluding 0%), 0.3 wt% or less of P (excluding 0%) , 0.001-0.03 wt% of N, 0.004 wt% or less of B (excluding 0%) , and the balance of Fe and other inevitable impurities, wherein the microstructure is a single-phase austenitic structure, and the grain size of the austenitic structure is 50 µm or less.

公开(公告)号：EP3872213A1

公开(公告)日：2021-09-01

申请号：EP19876375.7

申请日：2019-10-25

申请人： POSCO

发明人： KIM, Sung-Kyu ,  LEE, Sang-Hyeon ,  KANG, Sang-Deok ,  HAN, Sang-Ho ,  LEE, Un-Hae ,  HAN, Tae-Kyo ,  LEE, Dong-Ho ,  CHO, Won-Tae

IPC分类号： C22C38/38 ,  C22C38/20 ,  C22C38/32 ,  C22C38/02 ,  C22C38/06 ,  C22C38/00 ,  C21D9/46 ,  C21D8/02 ,  C21D6/00 ,  B21B37/74 ,  B21B37/16

摘要： An aspect of the present invention can provide an austenitic high manganese steel for cryogenic applications and a manufacturing method for same, wherein the austenitic high manganese steel for cryogenic applications effectively ensures resistance to stress corrosion cracking by inducing the formation of twin crystals in corrosion and transformation composite environments, and effectively ensures surface quality by suppressing the formation of cracks in the surface of the steel.

公开(公告)号：EP3872211A1

公开(公告)日：2021-09-01

申请号：EP19875537.3

申请日：2019-10-25

申请人： POSCO

发明人： LEE, Un-Hae ,  LEE, Dong-Ho ,  KIM, Sung-Kyu ,  KANG, Sang-Deok

IPC分类号： C22C38/38 ,  C22C38/20 ,  C22C38/02 ,  C22C38/06 ,  C22C38/32 ,  C21D9/46 ,  C21D8/02 ,  C21D6/00

摘要： The cryogenic austenitic high-manganese steel having excellent scale peeling properties, according to one aspect of the present invention, comprises 0.2-0.5 wt% of C, 23-28 wt% of Mn, 0.05-0.5 wt% of Si, 0.03 wt% or less of P, 0.005 wt% or less of S, 0.5 wt% or less of Al, and 3-4 wt% of Cr, with the remainder being Fe and other unavoidable impurities, and also comprises at least 95 area% of austenite as a microstructure, wherein the fraction of the unpeeled scale at the surface of the steel prior to descaling may be 30 area% or less (including 0 area%).

公开(公告)号：EP1979500B9

公开(公告)日：2012-06-20

申请号：EP06835357.2

申请日：2006-12-22

申请人： Posco

发明人： KIM, Seong-Ju ,  CHIN, Kwang-Geun ,  HWANG, Hyun-Gyu ,  KIM, Sung-Kyu ,  SOHN, Il-Ryoung ,  LEE, Young-Kook ,  LEE, Oh-Yeon

IPC分类号： C22C38/00

CPC分类号： B62D29/007 ,  B32B15/013 ,  C21D6/002 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0226 ,  C21D8/0247 ,  C21D8/04 ,  C21D8/0405 ,  C21D9/48 ,  C21D9/52 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/14 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C23C2/06 ,  C25D7/0614 ,  Y10T428/12799

摘要： A high-ductility, high-strength and high Mn steel strip used for steel strips of automobiles requiring superior formability and high strength, a plated steel strip produced by using the same, and a manufacturing method thereof are disclosed. The high Mn steel strip comprises, by weight%, 0.2 ~ 1.5% of C, 10 ~ 25% of Mn, 0.01 ~ 3.0% of Al, 0.005 ~ 2.0% of Si, 0.03% or less of P, 0.03% or less of S, 0.040% or less of N, and the balance of Fe and other unavoidable impurities. The high-ductility, high-strength and high Mn steel strip, and the plated steel strip produced by using the same have superior surface properties and plating characteristics.

公开(公告)号：EP1979500A1

公开(公告)日：2008-10-15

申请号：EP06835357.2

申请日：2006-12-22

申请人： Posco

发明人： KIM, Seong-Ju ,  CHIN, Kwang-Geun ,  HWANG, Hyun-Gyu ,  KIM, Sung-Kyu ,  SOHN, Il-Ryoung ,  LEE, Young-Kook ,  LEE, Oh-Yeon

IPC分类号： C22C38/00

CPC分类号： B62D29/007 ,  B32B15/013 ,  C21D6/002 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0226 ,  C21D8/0247 ,  C21D8/04 ,  C21D8/0405 ,  C21D9/48 ,  C21D9/52 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/14 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C23C2/06 ,  C25D7/0614 ,  Y10T428/12799

摘要： A high-ductility, high-strength and high Mn steel strip used for steel strips of automobiles requiring superior formability and high strength, a plated steel strip produced by using the same, and a manufacturing method thereof are disclosed. The high Mn steel strip comprises, by weight%, 0.2 ~ 1.5% of C, 10 ~ 25% of Mn, 0.01 ~ 3.0% of Al, 0.005 ~ 2.0% of Si, 0.03% or less of P, 0.03% or less of S, 0.040% or less of N, and the balance of Fe and other unavoidable impurities. The high-ductility, high-strength and high Mn steel strip, and the plated steel strip produced by using the same have superior surface properties and plating characteristics.

公开(公告)号：EP1971701A1

公开(公告)日：2008-09-24

申请号：EP06835302.8

申请日：2006-12-20

申请人： Posco Co., Ltd.

发明人： SOHN, Il-Ryoung ,  CHIN, Kwang-Geun ,  KIM, Seong-Ju ,  KIM, Myung-Soo ,  KIM, Sung-Kyu

IPC分类号： C23C2/06

CPC分类号： C23C2/06 ,  B32B15/012 ,  C21D6/005 ,  C21D8/0236 ,  C21D8/0273 ,  C21D8/0284 ,  C22C18/00 ,  C22C38/04 ,  C22C38/60 ,  C23C2/28 ,  Y10T428/12799

摘要： A high-manganese hot-dip coated steel sheet is disclosed which provides high corrosion resistance, high ductility and high strength, mainly used for inner and outer panels of automobiles, and a method of manufacturing the same. The high-manganese hot-dip coated steel sheet includes a substrate steel sheet having a composition of (in weight %) 0.1 to 1.5% of C, 5 to 35% of Mn, and the remainder includes Fe and other unavoidable impurities, and a hot-dip zinc coating layer formed on the substrate steel sheet, the hot-dip zinc coating layer having a composition of (in weight %) 0.1 to 10% of Mn, 5 to 15% of Fe, and the remainder including Zn and other unavoidable impurities.

摘要翻译： 的高锰热浸镀钢板是游离缺失盘，其提供高耐腐蚀性，高延性和高强度，主要用于汽车的内板和外板，及其制造方法。 的高锰热浸镀钢板包括具有的组成的基材钢板（重量％）C：0.1〜1.5％以下，Mn为5至35％，剩余部分包括Fe和其它不可避免的杂质，和一个 形成在基底钢板上的热浸镀锌层，其具有（以重量％计）0.1至10％的Mn，铁的5〜15％，剩余部分包含的Zn和其他的组合物的热浸镀锌层 杂质不可避免的。

公开(公告)号：EP4411013A1

公开(公告)日：2024-08-07

申请号：EP22873172.5

申请日：2022-09-21

申请人： POSCO Co., Ltd

发明人： CHO, Kyoung-Rae ,  KIM, Sung-Kyu ,  PARK, Jun-Ho ,  HAN, Sang-Ho ,  KIM, Jeong-Hun

IPC分类号： C22C38/38 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/00 ,  C21D8/02 ,  B21C47/02 ,  C21D9/46

CPC分类号： B21C47/02 ,  C21D8/02 ,  C21D9/46 ,  C22C38/00 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38

摘要： The present invention relates to steel suitable as a material for automobiles and, particularly, to a high-strength and thick steel sheet having excellent hole expandability and ductility, and a manufacturing method therefor.

公开(公告)号：EP3872217A1

公开(公告)日：2021-09-01

申请号：EP19877327.7

申请日：2019-10-25

申请人： POSCO

发明人： KIM, Sung-Kyu ,  HA, Yu-Mi ,  LEE, Dong-Ho ,  LEE, Un-Hae

IPC分类号： C22C38/38 ,  C22C38/20 ,  C22C38/32 ,  C22C38/02 ,  C22C38/06 ,  C22C38/00 ,  C21D9/46 ,  C21D8/02 ,  C21D6/00 ,  B21B3/00 ,  B21B1/16

摘要： A cryogenic austenitic high manganese steel having excellent surface quality according to an aspect of the present invention comprises: in weight%, 0.4-0.5% of C; 23-26% of Mn; 0.03-0.5% of Si; 3-5% of Cr; 0.05% or less of Al; 0.05% or less of S; 0.5% or less of P; and 0.005% or less of B; and the balance being Fe and unavoidable impurities, and contains 95 area% or more of austenite as a microstructure, wherein under cross-sectional observation using a microscope, the number of surface flaws formed at a depth of 10 µm or more from the surface may be 0.0001 or less per unit area (mm 2 ) from among the surface flaws observed in an area from the surface to a t/8 (where t means product thickness (mm)) point.

公开(公告)号：EP3872212A1

公开(公告)日：2021-09-01

申请号：EP19875923.5

申请日：2019-10-25

申请人： POSCO

发明人： LEE, Un-Hae ,  LEE, Dong-Ho ,  KANG, Sang-Deok ,  KIM, Sung-Kyu

IPC分类号： C22C38/38 ,  C22C38/20 ,  C22C38/02 ,  C22C38/06 ,  C22C38/32 ,  C21D9/46 ,  C21D8/02 ,  C21D6/00

摘要： The cryogenic austenitic high-manganese steel having excellent corrosion resistance, according to one aspect of the present invention, comprises 0.2-0.5 wt% of C, 23-28 wt% of Mn, 0.05-0.5 wt% of Si, 0.03 wt% or less of P, 0.005 wt% or less of S, 0.5 wt% or less of Al, and 3-4 wt% of Cr, with the remainder being Fe and other unavoidable impurities, also comprises at least 95 area% of austenite as a microstructure, and has Cr concentration sections continuously formed within an area of 50 µm in the thickness direction from the surface, wherein the Cr concentration sections comprise a high Cr concentration section having a relatively high concentration of Cr, and a low Cr concentration section having a relatively low concentration of Cr, and the high Cr concentration section may be distributed at 30 area% or less (but not 0%) relative to the whole surface area of the Cr sections.

公开(公告)号：EP3872209A1

公开(公告)日：2021-09-01

申请号：EP19875440.0

申请日：2019-10-25

申请人： POSCO

发明人： LEE, Dong-Ho ,  KIM, Sung-Kyu ,  LEE, Un-Hae ,  KANG, Sang-Deok ,  HAN, Sang-Ho

IPC分类号： C22C38/38 ,  C22C38/28 ,  C22C38/22 ,  C22C38/24 ,  C22C38/02 ,  C22C38/06 ,  C22C38/00 ,  C21D9/46 ,  C21D8/02 ,  C21D6/00

摘要： The present invention relates to nonmagnetic steel that can be suitably used for components in which an eddy current occurs, such as a distribution board and a transformer, and, more specifically, to nonmagnetic steel having excellent strength, ductility and weldability, and a manufacturing method therefor.