Effect of titanium and rare earth microalloying on microsegregation,eutectic carbides of M2 high speed steel during ESR process

查看全文 作　　者：Fuxing [1,2,3]Yin;Lu [1]Wang;Zhixia [1,2,3]Xiao;Jianhang [1,2,3]Feng;Lin [4]Zhao

机构地区：[1]School of Materials Science and Engineering,Hebei University of Technology,Tianjin 300130,China;[2]Research Institute for Energy Equipment Materials,Hebei University of Technology,Tianjin 300130,China;[3]Tianjin Key Laboratory of Materials Laminating Fabrication and Interfacial Controlling Technology,Tianjin 300130,China;[4]Central Iron and Steel Research Institute,Beijing 100081,China

出　　处：《Journal of Rare Earths》索引2020年第38卷第9期,共10页

基　　金：Project supported by the Natural Science Foundation-Steel and Iron Foundation of Hebei Province(E2019202482);the Hebei Province Education Department Science and Technology Research Project(QN2018034);the Tianjin Science and Technology Support Program(18YFZCGX00220)。 摘　　要：The effects of RE and Ti microalloying during electroslag remelting(ESR)process on the microsegregation and morphology of eutectic M2C carbides in M2 high speed steel were investigated.The results show that the addition of 0.2 wt%RE can alleviate the segregation of C,W,Mo,V and Cr,while the morphology of eutectic M2C carbides hardly changes.The microalloying with the addition of 0.5 wt%Ti has the lowest degree of microsegregation due to the improvement of primary dendrites by the effective heterogeneous nucleating agent of(Ti,V)(C,N)particles.The addition of Ti makes the mo rphology of M2C carbides change from rod-like or maze-like shape into a coarse feathery shape,exhibiting anisotropic facet growth characteristics.For the microalloying of 0.2 wt%RE and 0.5 wt%Ti,the segregation of the main metal alloying elements is slightly more severe than that of the addition of only RE or Ti.Under the combined action of RE and Ti,the feathery eutectic M2C becomes thinner and shorter and tends to be isolated or distributed in a discontinuous network. 关键词：MICROSEGREGATION Morphology Eutectic carbides High speed steel Electroslag remelting Rare earths

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Effect of titanium and rare earth microalloying on microsegregation,eutectic carbides of M2 high speed steel during ESR process

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