Numerical prediction of ferrite and pearlite microstructure and hardness --material property predictions in hot forging of vanadium microalloyed steels II

摘要

Empirical models combined with FEM simulation were developed to predict the microstructure of hot-forged vanadium miroalloyed steel products. Experiments were conducted performed to investigate the influence of austenite grain, strain, compression temperature, and cooling rate on transformation. An experimental formula for predicting ferrite volume fraction and hardness was developed. These empirical models were incorporated into the FEM and ferrite grain size, volume fraction of ferrite and hardness for practical multiple-stage hot-forging were calculated. The experimental results agree well with the predicted results.