TiC粉体影响铝铜合金凝固组织的数值模拟研究

Numerical Simulation Study on Effect of Ti C Powders on Solidification Structure of Aluminum-Copper Alloy

利用Pro CAST进行数值模拟计算,研究添加Ti C粉体前后铝铜合金凝固组织的变化,通过分析试验和数值模拟结果,综合计算Ti C粉体在铝铜合金中吸收率。在此基础上,研究Ti C粉体加入量对铝铜合金凝固组织的影响。结果表明:添加Ti C粉体后铝铜合金晶粒细化,数值模拟结果与试验现象基本符合,根据数值模拟和试验结果计算Ti C粉体作为异质形核核心在铝铜合金中吸收率为8.02伊10-6;通过数值模拟可知,Ti C粉体加入量为0.1%较为合理。

The effect of TiC powders on solidification structure of A1-Cu alloy was investigated on the basis of ProCAST numerical simulation. The absorptivity of TiC powders was computed by combining the numerical simulations with the experiments. On this basis, the effect of addition quantity of TiC powders on solidification structure of A1-Cu alloy was studied. The results show that the grain of A1-Cu alloy was refined, and the results of the numerical simulation were in accordance with the results of experiments. As heterogeneous nuclei, the absorptivity of TiC powders was 8.02×104 on the basis of numerical simulations and the experiments. And it was more reasonable to add 0.1% TiC powders.