(1. 北京科技大学 冶金学院， 北京 100083;
2. 北京科技大学 材料科学与工程学院, 北京 100083)
摘 要: 确定半固态触变成形的边界条件，在半固态表观粘度耦合于流场的动量方程上， 建立半固态AlSi7Mg充型过程的计算模型。对不同充填速度、 浇口形状以及浇口设置位置下半固态成形过程进行模拟分析。 结果表明： 半固态合金的充填速度对流态及成形质量具有明显影响， 与压铸相比， 半固态浇口形状、设置位置等因素对充填流态影响相对较小， 所以半固态工艺设计较为灵活。 半固态压铸机的充填流量及充填压力取决于浇口面积、 充填速度以及合金种类。 充填速度决定半固态浆料流动形态，进而影响半固态制件的成形质量。
关键字: 半固态铝合金； 充填速度； 浇
（ 1. School of Metallurgy, University of Science and Technology Beijing, Beijing 100083, China；
2. School of Materials Science and Engineering,
University of Science and Technology Beijing,
Beijing 100083, China）
Abstract: Based on the boundary conditions of forming processes of semi-solid AlSi7Mg slurry, a mathematic model of slurry flow coupled with apparent viscosity was established. The effects of the filling velocity and gate shape and located position on semi-solid forming quality and flow patterns were investigated with simulation. The results show that the filling velocity of semi-solid alloy presents a great effect on forming process, the gate shape and located position have little effects on the flow patterns compared with die casting, so the process design for semi-solid is flexible. The results demonstrate that the selection of filling discharge and pressure depends on the gate area, filling velocity and alloy type. The flow pattern of semi-solid slurry depends on filling velocity, which has a great effect on the semi-solid forming quality.
Key words: semi-solid Al alloy; filling velocity; gate
