There is a serious segregation phenomenon during solidification process because Cu-Cr material is a two-phase composite material and Cr usually emended in the copper. So the solidification temperature field distribution was effected seriously by segregation phenomenon. In order to analyze the effect of Cr phase segregation on the distribution of temperature field, a 3D segregation solidification model which adopted concentration gradient and distribution area gradient▽SCr was built based on Eulerian-Eulerian and calculated by Fluent. The Cu-6.5%Cr segregation and the temperature field distribution were gained. The result shows that Cr frozen laterally at tta时,顶部的Cr会大量聚集,形成顶部偏析,两侧Cr相"困"于糊状区,形成壁面偏析;随着凝固界面横向推移,壁面偏析对壁面温度场的分布产生影响,Cu的传热系数是Cr的3.85倍,随着Cr相偏析度的增加,降低了基体壁面的传热效率,导致温度梯度变大.研究工作将模拟结果与实验结果进行了对比,证明了模型的准确性.
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