Hot deformation behavior of 2Ni6Cr5Al2MoV bearing steel under deformation temperature of 900-1200 ℃ and strain rate of 0.01-10 s-1 was studied by Gleeble-3800 simulation machine.The high temperature constitutive equation and recrystallization critical strain model were established and verified.Based on the theory of dynamic material model,the hot processing maps of the steel at true strain of 0.6 and 0.7 were drawn.The results show that the flow stress of the steel increases with the increase of strain rate and the decrease of deformation temperature.Increasing deformation temperature and decreasing strain rate are beneficial to the dynamic recrystallization.The maximum energy dissipation rate η of the steel is about 0.37,and the strain variable has little influence on the dissipation factor.The suitable hot working conditions for the steel are deformation temperature of 1100-1200 ℃ and strain rate of 0.01-0.1 s-1.
万方数据
维普
