关键词：奥氏体化；成核速率；球状渗碳体；元胞自动机
摘 要：Austenitization is a solid-phase transformation process accompanied by nucleation and nucleus growth controlled by long-range carbon diffusion. In our work, a method was developed for constructing spheroidite model structures in such a way that their different parameters (the size of ferrite grains, the average value of carbon concentration, the size of cementite spheroids) could be changed optionally. In addition, a nucleation model of free energy base was created by which the difference between the two different places of nucleation can be distinguished on the basis of their free energy. The effects of structure parameters, interface free energies and temperature on the nucleation rate of austenite were investigated by cellular automaton simulations.