Hot deformation behavior of Cr micro-alloyed low carbon steel

Hot deformation behavior of a low carbon steel with the addition of chromium, manganese and titanium was investigated by means of simulation on a Gleeble-3500 simula for at 700~1050°C and strain rates of 0.01~0.1s-1. The results show that the peak flow stress increases with reducing the deformation temperature in austenite and ferrite regions, and decreases in γ-α region. The value of peak flow stress at 775~850°C in ferrite region is similar to that at 950~1050°C in austenite region. Processing map for hot working was established and discussed based on the microstructure observation. The apparent activation energy for hot deformation and the hot deformation equation in ferrite for the steel are determined according to the flow stress curve.