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《Iron & Steel》 2010-01
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Effect of Q-P(-T) Process on Microstructure and Mechanical Properties of 35Si2Ni2 Steel

WANG Cun-yu,SHI Jie,LIU Su,DONG Han(Institute for Structural Materials,Central Iron & Steel Research Institute,Beijing 100081,China)  
The effect of "Quenching-Partitioning-(Tempering)(Q-P(-T)) process on the microstructure and mechanical properties of 35Si2Ni2 steel were investigated,and compared them with traditional Quenching-Tempering(Q-T) process.Microstructure was studied by using SEM,TEM and XRD.The results show that samples treated by quenching-partitioning get more retained austenite compared with traditional quenching-tempering process,the strength decrease slightly,while the ductility and toughness improved markedly.Retained austenite of the samples treated by quenching-partitioning-tempering process decomposited and ε carbides precipitated,which resulted the increasing of yield strength,as well as the yield ratio.
【CateGory Index】: TG151
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