公开(公告)号：EP3730649A1

公开(公告)日：2020-10-28

申请号：EP18890993.1

申请日：2018-12-20

申请人： POSCO

发明人： KIM, Yong-Jin ,  JUNG, Young-Deok ,  KANG, Myeong-Hun ,  YUN, Yeo-Sun ,  PARK, Soo-Gil

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

摘要： The purpose of the present invention is to provide a steel material and a manufacturing method for the same, wherein the steel material has excellent strength, elongation, and impact toughness as well as excellent inside quality and wear resistance. According to the present invention, provided are a steel material having excellent wear resistance and a manufacturing method for the same, wherein the steel material contains, in weight, 0.55-1.4% carbon (C), 12-23% manganese (Mn), 5% or less (excluding 0%) chromium (Cr), 5% or less (excluding 0%) copper (Cu), 0.5% or less (excluding 0%) Al, 1.0% or less (excluding 0%) Si, 0.02% or less (including 0%) S, 0.04% or less (including 0%) phosphor (P), and the balance Fe and unavoidable impurities, and has a microstructure comprising, in area, 10% or less (including 0%) carbide and the balance austenite.

公开(公告)号：EP3872214A1

公开(公告)日：2021-09-01

申请号：EP19876472.2

申请日：2019-10-25

申请人： POSCO

发明人： LEE, Un-Hae ,  LEE, Dong-Ho ,  CHO, Won-Tae ,  LEE, Soon-Gi ,  CHOI, Chang-Sik ,  KANG, Sang-Deok ,  JUNG, Young-Deok ,  KIM, Bo-Sung ,  SEOK, Jeong-Hun

IPC分类号： C22C38/38 ,  C22C38/04 ,  C22C38/02 ,  C22C38/06 ,  C22C38/32 ,  C22C38/00 ,  C21D9/46 ,  C21D8/02 ,  C21D6/00

摘要： The high manganese steel having excellent oxygen cutting properties, according to one aspect of the present invention, comprises 0.1-0.5 wt% of carbon (C), 20-26 wt% of manganese (Mn), 0.05-0.4 wt% of silicon (Si), at most 2.0 wt% of aluminum (Al), and at most 4 wt% of chromium (Cr), with the remainder being Fe and other unavoidable impurities, and has a cutting sensitivity (Sc), calculated according to [relational expression 1] below, of at least 430 and may comprise at least 95 area% of austenite as a microstructure. [Relational expression 1] Cutting sensitivity (Sc) = 1742 - 662*[C] - 19.2*[Mn] + 1.6*[Al] - 140*[Cr] (In [relational expression 1], [C], [Mn], [Al], and [Cr] represent the respective percentages by weight of C, Mn, Al, and Cr included in the steel and, if the elements concerned are not included, represent 0.)

公开(公告)号：EP3561120A1

公开(公告)日：2019-10-30

申请号：EP17882436.3

申请日：2017-12-21

申请人： POSCO

发明人： KIM, Yong-Jin ,  OH, Hong-Yeol ,  LEE, Hong-Ju ,  KANG, Sang-Deok ,  PARK, Yoen-Jung ,  JUNG, Young-Deok

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

摘要： Provided according to one preferred aspect of the present invention are austenite steel material having superb abrasion resistance and toughness, and a method for producing the austenite steel material. The austenite steel material having superb abrasion resistance and toughness according to one preferred aspect of the present invention comprises, in wt%: 0.6-1.9% carbon (C); 12-22% manganese (Mn); 5% or lower (excluding 0%) chromium (Cr); 5% or lower (excluding 0%) copper (Cu) ; 0.5% or lower (excluding 0%) aluminum (Al) ; 1.0% or lower (excluding 0%) silicon (Si) ; 0.1% or lower (including 0%) phosphorous (P) ; 0.02% or lower (including 0%) sulfur (S) ; and the rest in Fe and unavoidable impurities, and has the microstructure comprising, by surface area fraction, 97% or higher (including 100%) austenite and 3% or lower (including 0%) carbide.

公开(公告)号：EP3699313A1

公开(公告)日：2020-08-26

申请号：EP18868100.1

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 ,  C21D6/00 ,  C21D7/13 ,  C21D9/00

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：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.