不同铸型铸造凝固过程温度场的有限元模拟

Finite Element Simulation of Temperature Field of ZL105 Alloy Sample in Solidification Process Under Different Mold

利用有限元方法,采用阶梯试块,对ZL105合金的砂型铸造和金属型铸造的凝固过程中的温度场进行了有限元模拟。结果表明,砂型铸造时铸件冷却速度慢,铸件内温度梯度小,最后冷却的部位在铸件的最大尺寸处,铸型与铸件界面处的温度较高。金属型铸造时铸件冷却速度快,铸件内温度梯度大,最后冷却的部位偏离铸件的最大尺寸位置一定距离,铸型与铸件界面处的温度较低。

The Temperature fields in ladder-shaped sample of ZL105 alloy with sand mold and metal mold in solidification process were simulated by finite element method. The results show that, with sand mold, the solidification velocity of the sample is slow, the temperature grads is small, the last solidification place is in the biggest size of sample and the temperature is high in the interface between mold and sample; but with metal mold, the solidification velocity of the sample is fast, the temperature grads is big, the last solidification place departs the biggest size of sample and the temperature is low in the interface between mold and sample.