ZA27合金凝固过程两相流数值模拟  

Solidification Simulation of ZA27 Alloy with TwoPhase Flow Model

作　　者：张占领[1] 杨留栓[1] 李会强[1] 

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471003

出　　处：《河南科技大学学报（自然科学版）》2003年第3期25-27,共3页Journal of Henan University of Science And Technology:Natural Science

基　　金：河南省教育厅自然科学基金资助项目(1999460014)

摘　　要：ZA27合金的凝固特性为典型的糊状凝固并具有比重偏析,为研究比重偏析,本文建立了两相流凝固模型,用Phoenics软件在三维柱坐标系中建模,用有限差分法离散。浓度场模拟结果表明铸件中铝元素有明显的成分偏析,与试验结果基本吻合。该凝固模型能较好地解决凝固过程中固液两相的对流问题,较好地模拟比重偏析现象。ZA27 alloy solidifies in the way of pastesolidification, and results in gravity segregation. The twophase flow model was built on the basis of the solidification characteristic of the ZnAl 27 alloy. And the equations were differentiated and computed in 3D cylindrical coordinates system by Phoenics. The computation of the composition field indicated a segregation of Al,and is in good agreement with the experiments. This model can simulate the convection and the gravitational segregation during the solidification.

关 键 词：ZA27合金 凝固 比重偏析 有限差分法 离散 力学性能 

分 类 号：TG146.21[一般工业技术—材料科学与工程] TG146.13[金属学及工艺—金属材料]