Simulation of microstructures in solidification of aluminum twin-roll casting based on CA  

作　　者：刘晓波 许庆彦 荆涛 柳百成 

机构地区：[1]School of Aeronautics and Mechanical Engineering,Nanchang Hangkong University [2]Department of Mechanical Engineering,Tsinghua University

出　　处：《中国有色金属学会会刊：英文版》2009年第2期422-427,共6页Transactions of Nonferrous Metals Society of China

基　　金：Project(50564004) supported by the National Natural Science Foundation of China;Project(G2000067208-3) supported by the National Basic Research Program of China;Project(0250020) supported by the Natural Science Foundation of Jiangxi Province, China

摘　　要：The microstructures in the solidification process of aluminum twin-roll casting was simulated based on CA(Cellular Automation Method),and the nucleation model based on the normal distribution and KUZR-GIOVANOLS-TRIVEDI(KGT) growth model were used in the calculation. FDM(Finite Difference Method) combined with relative motion was used,and dynamic evolution of microstructures in the process of aluminum twin-roll casting was achieved. Visual Fortran programming language was adopted to calculate and realize the image post-processing. Moreover,the effect of different casting process parameters on the formation of the microstructures was simulated. The results are helpful to explaining the dendritic segregation and size segregation as well as shrinkage-porosity defects. Columnar grains mainly distribute near the casting roller while equiaxed grains distributed far away from the casting roller.The microstructures in the solidification process of aluminum twin-roll casting was simulated based on CA （Cellular Automation Method）, and the nucleation model based on the normal distribution and KUZR-GIOVANOLS-TRIVEDI（KGT） growth model were used in the calculation. FDM （Finite Difference Method） combined with relative motion was used, and dynamic evolution of microstructures in the process of aluminum twin-roll casting was achieved. Visual Fortran programming language was adopted to calculate and realize the image post-processing. Moreover, the effect of different casting process parameters on the formation of the microstructures was simulated. The results are helpful to explaining the dendritic segregation and size segregation as well as shrinkage-porosity defects. Columnar grains mainly distribute near the casting roller while equiaxed grains distributed far away from the casting roller.

关 键 词：凝固微观组织 双辊铸轧 数值模拟 CA FORTRAN 有限差分法 铝 铸造工艺参数 

分 类 号：TG292[金属学及工艺—铸造]