Recystallization of HSLA steel austenite as revealed with a hot-compression test

Hot deformation of the HSLA-type steel was investigated applying the method of the relaxation of stresses by means of a Gleeble 3800 thermomechanical simulator.The influence of the conditions of plastic deformation on the shape of stress-strain flow curves and the kinetics of thermally activated static processes were determined.It was found that the microstructure of the investigated steel and the state of the precipitations of Nb and Ti carbonitrides after hot deformation depend mainly on the degree of deformation and the time of the relaxation of stresses.