Temperature Change and Static Softening in Deformation Interval Time of Q235 Steel during Dynamic Recrystallization

Temperature change during dynamic recrystallization process and static softening behavior were studied under different thermal deformation conditions on Gleeble-1500 thermal simulator. The results show that dynamic recrystallization of the steel occured when deformed at the strain rate of 1s -1, and the deformation resistance declined and the temperature of samples decreased. While the sample temperature increased at the high strain rate of 5, 10 s-1. The sample had softening of 20%-95% in double-pass deformation interval time at 800 and 850 ℃.