Hot Ductility of Ti/V Containing High-Mn Austenitic Steels
Hot ductility of Ti/V containing hign-Mn austenitic steels were studied by theoretical calculation and thermal simulation experiment.The fracture surfaces and particles precipitated at different tensile temperatures were characterized by means of scanning electron microscope and X-Ray energy dispersive spectrometry (SEM-EDS).The phase equilibrium diagrams of the precipitates in Ti-V high-Mn steel was calculated by the Thermo-Calc software.Hot ductility as a function of reduction (R.A.) curves shows that 0.11wt%Ti+0.20wt%V addition did not show any improvement on hot ductility,when compared to a non-microalloyed steel.The results of Thermo-Calc calculation shows that 0.11wt%Ti+0.20wt%V addition would cause Ti(C,N) to precipitate at 1490℃,which is higher than the liquidus temperature of high-Mn steel.The SEM-EDS results shows that (Ti,V)(C,N) particles with bigger size could accelerate the extension of the cracks along the grain boundaries.
high-Mn Hadfield steels Ti and V microalloying elements hot ductility grain boundary sliding
LIU Hongbo LIU Jianhua WU Bowei DING Hao LI Shiqi
Institute of Engineering Technology, University of Science and Technology Beijing, Beijing 100083, C Technical Center, Hebei Iron and Steel Group, Shijiazhuang 050031, Hebei, China
国际会议
成都
英文
321-325
2016-11-16（万方平台首次上网日期，不代表论文的发表时间）