公开(公告)号：EP0573641B1

公开(公告)日：1998-09-09

申请号：EP93901496.5

申请日：1992-12-29

申请人： POHANG IRON & STEEL CO., LTD. ,  RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY

发明人： KIM, Tai, Woung Res. Inst. of Industrial Science ,  HAN, Jae Kwang Res. Inst. of Industrial Science ,  CHANG, Rae Woung Res. Inst. of Industrial Science ,  KIM, Young Gil

IPC分类号： C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C21D7/13 ,  C21D7/02

CPC分类号： C21D8/0205 ,  C21D8/0405 ,  C22C38/04

摘要： An austenitic high manganese steel having superior formability, strength and weldability, and a process for manufacturing the steel, are disclosed. The superior formability of the steel is suitable for use on automobiles and electronic panel. The steel has a composition of (in weight %) less than 1.5 % of C, 15.0-35.0 % of Mn, 0.1-6.0 % of Al, and the balance of Fe and other indispensable impurities. The size of the austenite grains is less than 40.0 mu m, and, one or more elements are added by selecting them from a group consisting of less than 0.60 % of Si, less than 5.0 % of Cu, less than 1.0 % of Nb, less than 0.5 % of V, less than 0.5 % of Ti, less than 9.0 % of Cr, less than 4.0 % of Ni, and less than 0.2 % of N, thereby providing an austenitic high manganese steel having superior formability, strength and weldability.