Influence of Vanadium Content on Austenite Recrystallization Rule of Low Carbon Steel

To investigate the dynamic recrystallization rule of vanadium microalloying low carbon steel and its influence factors,flow curves under dynamic recrystallization conditions of 4 kinds of V-N microalloy steels were obtined by experiments so that the relationship of peak stressσp,strain rateεandtemperature T was obtained from the flow curve.The effect of temperature and content of V,N on dynamic recrystallization model was studied.By the way,an Avrami model for V-N microalloy steels was establishedand and the dynamic recrystallization activation energy was obtained by regression.The results show that V has a limit effect on improving the dynamic recrystallization critical temperature,while V combined with N has the significant effect on the critical temperature so as to inhibit the dynamic recrystallization.