采用Procast软件模拟计算重型燃机叶片熔模铸造过程的温度场,对凝固过程进行了分析,研究了不同的浇注温度对叶片缩松的影响。结果表明,随着浇注温度提高,叶根、叶身处缩松均减少。通过在型壳适当的位置加冷铁、包裹保温棉,可以显著地减少叶片的缩松。对模拟得到的较优工艺进行试验验证,叶片缩松的位置、变化规律与模拟结果相吻合。 The Procast software was used to simulate the temperature field of the heavy-duty gas turbine blade during the investment casting process. The solidification process was analyzed. The influence of different pouring temperature on the leaf shrinkage was studied. The results showed that with the increase of pouring temperature, the shrinkage of roots and leaves decreased. By adding cold iron in the appropriate location of the shell, wrapping insulation cotton, can significantly reduce leaf shrinkage. The simulation of the better technology to test the validation, the location of leaf shrinkage, variation and simulation results are consistent.