Abstract
A model for prediction of the dynamic recrystalhzation microstructure and properties evolution of hot deformed austenite for micro alloyed steel by cellular automaton(CA) was developed. The theoretical modeling of dynamic recrystalhzation was on the basis of dislocation density,and the nucleation and grain growth of dynamic recrystalhzation were considered.The microstructure evolution of austenite dynamic recrystalhzation,such as the grain shape,grain size and volume fraction, was predicted quantitatively and visually described.Moreover the distribution and variation of the dislocation density and flow tress were obtained.Meanwhile,the microstructure and variation of the flow tress of micro alloyed steel during hot deformation were measured by experiments.The measured results were in good agreement with the CA calculation results.
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