双金属复合过程非稳态温度场的研究

应用数值模拟技术对双金属过程中的非稳态温度场进行计算，由于外材和芯材在凝固过程温度变化的不同特点，选择不同的权系数计算温度，同时，在温度的计算中，考虑了双金属复合结合界面热阻，凝固过程中释放潜热以及导热系数等各方面因素的影响，通过热电耦对不同位置的温度值进行采集，将采集到的温度曲线和模拟的温度曲线进行对比，结果表明模拟的温度曲线比较能够反映实际温度的变化。

Unstable Temperature Field Simulation of Bimetallic Composite Casting Process

This paper uses numerical simulation technique to simulate unstable temperature field in the process of bimetallic composite casting. Choosing different coefficient to calculate temperature changing in the process of solidification to outer-material and inner-material. At the same time,various kinds of influencing factors such as heating hinder ,latent heat and conduct coefficient during calculate temperature are taken into account.Temperature at different positions are taken and a comparison is made with simulation temperature curves.The simulation curves of temperature can display the actual changes of temperature.