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实测了不同抽拉速度单晶高温合金定向凝固过程的初始条件、边界条件及温度场，建立了数值模拟系统的实体模型，采用ＰｒｏＣＡＳＴ有限元模拟软件包计算了不同抽拉速度单晶合金试板的定向凝固过程温度场。结果表明：模拟结果与实测结果吻合良好，在１０００℃以上计算温度曲线与实测温度曲线相比误差小于５％；随着抽拉速度的增加，凝固速度提高，向下凹的液相线的曲率变大；采用数值模拟可为单晶合金定向凝固工艺的优化提供一种有效的手段。
The initial conditions, boundary conditions and temperature field of the directional solidification process of single crystal superalloy with different drawing speeds were measured. The solid model of the numerical simulation system was established. ProCAST finite element simulation software package was used to calculate the single crystal alloy test panels The directional solidification process temperature field. The results show that the simulated results are in good agreement with the measured ones. The error of the calculated temperature curve is less than 5% compared with the measured temperature curve at 1000 ℃. With the increase of the drawing speed, the solidification rate increases and the curvature of the concave liquidus The numerical simulation can provide an effective method for the optimization of directional solidification process of single crystal alloy.