Numerical Simulation of Large-scale Hollow Directional Blade Based on ProCAST
The temperature field of large-size hollow directional blade of DZ409 alloy during investment casting pro-cess was investigated by the ProCAST software,and the variation of the front edge of solid-liquid interface was ana-lyzed.Effects of pouring temperature,shell temperature and drawing rate on temperature field,solidification param-eters and stress field during directional solidification were explored,and the solidification structure was simulated by G/R analysis.The results indicate that with the pouring temperature of 1 560℃and mold temperature of 1 560℃,the temperature gradient and G/R value of the casting are larger at different positions,which is conducive to the growth of directional solidification columnar crystal.Low drawing rate can lead to large temperature gradient and G/R value,which is conducive to the growth of directional columnar grain.The grain orientation of the leaf can be significantly improved by selecting suitable pouring temperature and drawing rate.The optimum process obtained by simulation was verified,and the grain orientation results are in consistent with the simulated ones.
NETL
NSTL
万方数据
