An ultrahigh strength steel produced through deformation-induced ferrite transformation and Q&P process

查看全文 作　　者：CHEN [1]MingMing;WU [1]RiMing;LIU [2]HePing;WANG [3]Li;SHI [4]Jie;DONG [4]Han;JIN [1]XueJun

机构地区：[1]School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;[2]School of Material Science and Engineering,North University of China,Taiyuan 030051,China;[3]Baosteel Research and Development Technology Center,Shanghai 201900,China;[4]National Engineering Research Center of Advanced Steel Technology(NERCAST),Central Iron and Steel Research Institute(CISRI),Beijing 100081,China

出　　处：《Science China(Technological Sciences)》索引2012年第55卷第7期,共6页

基　　金：supported by the National Engineering Research Center of Advanced Steel Technology (NERCAST);the National Basic Research Program of China '973 Program' (Grant No. 2010CB630803);the National Natural Science Foundation of China (Grant No. 51174251) 摘　　要：In this work,DIFT technology and Q&P process were combined in order to introduce ultrafine-grained ferrite into the matrix of martensite and retained austenite to develop a new kind of advanced high strength steel,and two kinds of steels were investigated by this novel combined process.The newly designed process resulted in a sophisticated microstructure of a large amount of ferrite(about 5 m in diameter),martensite and a considerable amount of retained austenite for TRIP 780 steel.The ultimate tensile strength can reach about 1200 MPa with elongation above 16% for TRIP 780,that is much higher than the one solely treated by Q&P process.Tensile tests showed that both steels with the novel combined process achieved a good combination of strength and ductility,indicating that the new process is promising for the new generation of advanced high strength steels. 关键词：超高强度钢铁素体诱导变形组合工艺 DIFT 微观结构抗拉强度

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An ultrahigh strength steel produced through deformation-induced ferrite transformation and Q&P process

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