关键词: 42CrMo合金;元胞自动机;有限元;宏微观边界;环件铸辗复合成形

Abstract: A modeling approach coupling with both macroscopic and microscopic as-cast 42CrMo alloy ring short process flow casting-rolling compound forming process is proposed based on finite element(FE) theory and cellular automata(CA) model. Within the theory framework of casting-rolling compound forming new process, boundary transition conditions of macro/micro interfaces are defined in consideration of ring hot deformation behavior and grain special topological structure, these boundary conditions are contribute to solve the bottleneck problem of controlling ring shape/property. Within the framework of CA model, the grain topology deformation technology is studied, the space overlapping problem of grain structures are considered fully and the grain topological structures are optimized by using the independent component analysis. The hybrid model is applied to simulate the ring short process flow casting-rolling compound forming process. The results indicate that hybrid modeling can simulate process respectively by using different level macro micro models according to different scales of the integral and the local of a ring, the simulation efficiency of ring short process flow casting-rolling compound forming process is enhanced effectively.

Key words: 42CrMo alloy;cellular automata;finite element;macro/micro interfaces;blank-casting and rolling compound forming