Abstract
The microstructure evolution simulation of the whole process, i.e., the cooling after hot rolling, cold rolling, recrystallization, austenitizing, slow cooling, and quenching, for dual phase steel is conducted based on the cellular automata model. The state values of fraction, morphology, grain size, and carbon concentration distribution etc. of austenite, ferrite, and pearlite were obtained. The calculated kinetics curves and microstructure morphology with different chemical composition and heating or cooling rates agree well with the experiment. The growth of new phase is controlled by both interface mobility and carbon diffusivity due to the carbon diffusion in austenite and the driving force for phase interface migration are interacted with each other.
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