用元胞自动机方法模拟铸轧凝固组织,采用有限元方法模拟铸轧过程中熔池内部的宏观传输现象,将二者耦合模拟了镁合金铸轧薄带凝固过程中晶粒的形核与长大过程.阐明了薄带铸轧工艺过程中的主要工艺参数(浇注温度、铸轧速度等)对镁合金薄带凝固组织中晶粒大小、取向等的影响规律.这为通过工艺优化来控制铸轧薄带的凝固组织提供了理论依据. The cellular automata method was used to simulate the solidification microstructure of cast-rolled steel. The macro-transport phenomenon inside the molten pool in the process of casting and casting was simulated by the finite element method. The two were coupled to simulate the grain nucleation Growth process.Emphasized the strip casting process of the main process parameters (casting temperature, casting speed, etc.) on the solidification microstructure of magnesium alloy strip grain size, orientation, etc. This is through the process to optimize Control cast strip solidification microstructure provides a theoretical basis.