Modeling Pearlite Transformation in Super-high Strength Wire Rods: I. Modeling and Simulation in Fe–C–X Ternary Alloys

A computer model was developed to simulate pearlite transformation in Fe–C base near-eutectoid alloys during isothermal holding, continuous cooling and patenting in view of its application to high carbon super-high strength wire rods. The model is based upon Johnson-Mehl-Avrami theory; it consists of calculation of nucleation and growth rates and conversion of the extended to real volume as well as calculation of lamellar spacing from the well-known correlation with undercooling. Calculated pearlite start and finish temperatures, number and size of nodules and lamellar spacing were in good agreement with those obtained from Gleeble thermomechanical simulation.