Abstract:
High-temperature compression experiments at deformation temperatures of 850-1 150℃ and strain rates of 0.01-10 s
-1 were conducted on TD16 steel for high-speed railway screw spike using a Gleeble-3500 thermal simulation testing machine, and the dynamic recrystallization behavior was studied. The dynamic recrystallization models were established and verified by experiments. The results show that under the experimental conditions, the dynamic recrystallization behavior was observed in the TD16 steel. The dynamic recrystallization hardly occurred and the dynamic recrystallization grains became finer when the deformation temperature rose or the strain rate decreased. The maximum relative errors between the prediction values obtained by the dynamic recrystallization models and tested values of peak and critical strains,
ε0.5, and grain size were 7.08%, 11.06%, 21.3%, respectively. The predicted values were all in good agreement with the experimental values, showing that the dynamic recrystallization models can be used to predict the dynamic recrystallization behavior of TD16 steel.