DD6单晶高温合金导向叶片定向凝固过程数值模拟

Numerical Simulation of Directional Solidification Process on the Vane of Single Crystal Superalloy DD6

建立涡轮导向叶片三维实体模型,采用有限元软件ProCAST对DD6单晶高温合金导向叶片凝固过程温度场进行数值模拟;测试DD6单晶高温合金导向叶片不同位置凝固过程的温度变化。结果表明:数值模拟结果与实测结果偏差小于5%,吻合良好;导向叶片叶身的温度梯度大部分保持在25～45℃/cm范围内,缘板处温度梯度约为35℃/cm,导向叶片具有较大温度梯度,其等温线倾斜分布。

The three-dimensional model of the vane was built,temperature fields of DD6 single crystal vane was calculated with finite element software ProCAST.The temperature values of vane were indicated from the measurement during directional solidification.The simulated results were compared to the measured results,and the results showed that good consistency was observed and the deviation of temperatures was less than 5%.The temperature gradient of airfoil was between 25℃/cm and 45℃/cm,and the temperature gradient of platform was about 35℃/cm,and the isotherm of vane was tilted.