Study on the Model for Static Recrystallization of DC03 Steel

Through the method of orthogonal design,experiments were carried out to simulate the process conditions of high-temperature short-time continuous annealing and low-temperature long-time batch annealing of DC03 steel in the high-temperature chamber-type electric resistance furnace.Static recrystallization softening rate of DC03 steel under various annealing conditions after cold rolling was measured by using back-extrapolation method and its relationship with deformation degree,annealing temperature and annealing time was studied.The model was built based on Avrami equation and compared with static recrystallization kinetics model in double-pass hot working.The result indicates that annealing temperature has more influence on static recrystallization rate between two passes of hot deformation than that after cold rolling while the influence of holding time on them is totally opposite to that of annealing temperature.