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定向凝固过程的热分析计算包括对如下一些热参数的测定和计算:如铸件上的温度场和温度梯度场;凝固区固、液相界面上的温度梯度、生长速度和冷却速度;凝固区的宽度和局部凝固时间等。由于定向凝固铸件的力学性能在很大程度上与铸态组织有关,而铸态组织又取决于凝固过程的热参数,因此研究这些参数对合金凝固过程的影响在理论和实践上都有很大意义。由于单晶合金铸件不允许在定向凝固过程中出现多晶,所以对凝固过程的控制要求更加严格。为了确定合适的单晶合金的定
The thermal analysis of the directional solidification process includes the determination and calculation of some of the following thermal parameters: temperature field and temperature gradient field on the casting; temperature gradient, growth rate and cooling rate at the solid-liquid interface in the solidification zone; Width and local setting time. Since the mechanical properties of directional solidification castings are largely related to the as-cast microstructure, which in turn depends on the thermal parameters of the solidification process, it is of great theoretical and practical significance to study the influence of these parameters on the solidification process of the alloy significance. As single crystal alloy castings do not allow polycrystalline during directional solidification, the control of the solidification process is stricter. In order to determine the appropriate single crystal alloy set