Study on Batch Annealing Process of Ti-IF Steel Cold Rolled Sheet

The recrystllization temperature of Ti-IF steel in batch annealing process is tested,the results show that the recrystllization temperature decreases as the prolongation of heat insulating time under the experimental condition.The recrystllization temperature are 650℃and 640℃when the heating insulating time are 1h and 3h respectively.As the heating speed has little effect on the mechanical properties of Ti-IF steel,so a reasonable high heating speed could be adopted in the batch annealing process,such as 60℃/h.In order to uniform the temperature of steel coils and enable the cold spot to achieve the given temperature,the control temperature should be at upper limit during the batch annealing,and the heat insulating time should be long enough to enable the steel recrystallize completely.Under above control conditions,the Ti-IF steel cold rolled sheet produced by batch annealing has excellent and steady mechanical properties.