熔模铸造ZM5合金界面换热系数研究

Research on Interface Heat Transfer Coefficient of ZM5 Alloy Under the Condition of Investment Casting

通过试验测得ZM5合金在空冷条件下的温度曲线,利用数值模拟的反分析优化方法计算并求解了ZM5合金铸件在冷却凝固过程中型壳与金属液的界面换热系数,得到了界面换热系数随金属液温度的变化规律,并对反求得到的界面换热系数进行了验证,数值模拟得到的温度曲线与另一组试验测得的温度曲线吻合较好。

Through experiments, the temperature curves of ZM5 alloy under air-cooled conditions were measured, and the inverse analysis optimization method of numerical simulation was used to calculate and solve the interface heat transfer coefficient between the shell and the molten metal during the cooling and solidification process of ZM5 alloy castings. The change law of the interface heat transfer coefficient with alloy temperature was obtained, and the interface heat transfer coefficient obtained from the reverse calculation was verified. The temperature curves acquired in another set of experiments are in good agreement with that got by numerical simulation.