摘要
基于有限元软件FLUENT对ZTA陶瓷颗粒增强高铬铸铁基复合材料(HCCI/ZTAP)的充型过程进行了数值模拟。运用PISO算法求解了三维的控制方程,运用VOF模型和多相流模型准确描述了充型过程中金属液自由表面的位置,运用多孔介质模型模拟了金属液在多孔预制体内部的流动情况。预测了气孔、浇不足、缩孔等缺陷。结果表明:模拟结果与实验结果相吻合,最优的顶注式浇注工艺是浇注速度0.2 m/s和浇注温度1843 K。
The mold filling process of high chromium cast iron matrix composite reinforced by ZTA ceramic particles（HCCI/ZTAP） was numerically simulated based on finite element software FLUENT. Three-dimensional control equations were solved by using PISO algorithm. The location of molten metal free surface during mold filling process was described by using VOF model and multiphase flow model. The flow of liquid metal in the porous perform was simulated by using the porous medium model. Some defects such as porosity, short run and shrinkage were predicted. The results show that the simulation results agree well with the experimental results. The optimal top gating process is pouring velocity of 0.2 m/s and pouring temperature of 1843 K.
出处
《热加工工艺》
CSCD
北大核心
2016年第9期78-81,85,共5页
Hot Working Technology
基金
国家自然科学基金资助项目(51171074
51261013)
