True stress-true strain curves of hot-rolled low-carbon steel were obtained by performing hot deformation experiments on a Gleeble-1500thermal-mechanical simulator.The influences of hot deformation behaviors in the temperature range of 900-1200℃ and strain rates of 0.1-10s~(-1) were then investigated.The material constants of low-carbon steel in different deformation conditions were achieved by the non-linear regression and constitutive equation of low-carbon steel was established.Microstructural evolution ...