Numerical simulation on austenitization of cast steel during heating process

Cellular Automaton Modeling of Austenite Nucleation and Growth in Hypoeutectoid Steel during Heating Process

“…A continuous nucleation model 3,4,6,7) was employed to calculate the nucleus density of austenite grain in the pearlite region:…”

“…Austenite grains grow into the pearlite region at a velocity v γ /P : 3,4,6,7) .................... (2) where fG is the factor representing the influence of pearlite structure on the growth rate, and QG is the activation energy of growth.…”

“…Therefore, it is of great significance to study the kinetics and microstructure evolution during the austenitization process of steels. 4) The typical microstructure of a medium-carbon steel consists of pearlite and ferrite. Austenitization in hypoeutectoid steels occurs in two steps: (a) P→γ, and (b) α →γ, where P is pearlite, γ is austenite, and α is ferrite.…”

“…The transformation of ferrite into austenite occurs at a higher temperature and is completed above the (γ +α )/γ line in the phase diagram. 4) After the full austenite microstructure is formed, austenite grain coarsening occurs and it becomes more visible with increasing temperature. The mechanism and the kinetics of the austenitization process mentioned above have been widely discussed in literatures.…”

“…The mechanism and the kinetics of the austenitization process mentioned above have been widely discussed in literatures. [1][2][3][4][5][6] Numerical simulation has become a powerful tool for simulating the microstructure evolution. In recent years, some computer models have been developed to simulate the microstructure evolution during austenitization process.…”