Effect of time interval on microstructure evolution of medium carbon steel during warm deformation  

作　　者：Hong-bin Li Xiao-ping Zheng De-cheng Wan Lian-sheng Chen 

机构地区：[1]College of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063009, Hebei, China [2]Modem Metallurgy of Hebei Province Key Laboratory, Tangshan 063009, Hebei, China

出　　处：《Journal of Iron and Steel Research International》2019年第6期602-610,共9页

基　　金：supported by National Natural Science Foundation of China(51574107,51474091);Hebei Iron and Steel Joint Funds(Nos.E2015209243 and E2016209166);Tangshan Science and Technology Innovation Team Training Program(15130202C).

摘　　要：The thermal mechanical simulator system (Gleeble-3500) was used to carry out the double passes compression tests. The microstructure evolution of medium carbon steel with different time intervals during warm deformation was investigated by scanning electron microscopy, transmission electron microscopy and electron back-scattered diffraction. The results show that the effects of time interval on microstructure evolution are very important. The low-angle boundaries transform into high-angle boundaries (HABs) during interval. The fraction of HABs and homogeneity of particle carbides increase with increasing time interval. In addition, the homogeneity of carbides also increases with the strain. However, the effects of time interval on the microstructure evolution are negligible when it exceeds 100 s.

关 键 词：DOUBLE-PASS DEFORMATION WARM DEFORMATION Microstructure EVOLUTION MISORIENTATION 

分 类 号：TF[冶金工程]