关键词: 42CrMo4钢, 热轧, 动态再结晶, 有限元模拟

Abstract: The three dimensional thermal mechanically coupled simulation on alloy steel 42CrMo4 roiling in box pass has been carried out by using LARSTRAN/SHAPE finite element software. The local variables including equivalent stress, equivalent strain, equivalent strain rate and temperature distribution etc during rolling are simulated incrementally by viscoplastic finite element method to calculate the dynamic recrystallization and grain size after each discrete time step. It is obtained by simulation that with initial rolling temperature ≥1 050°C , the percentage of dynamic? recrystallization for hot rolled steel 42CrMo4 increases. In steel 42CrMo4 production the available initial rolling temperature is 1 050 〜1 100 °C.