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中文摘要：
对镁基复合材料半固态充型凝固过程进行数值模拟,并进行半固态流变成形实验。结果表明,在液态充型过程中,压力变化非常紊乱;而在固态充型过程中,压力在推进方向上逐渐降低,这将产生有利于充型的背压。凝固过程的固相体积分数变化表明：在半固态充型条件下,整个铸件基本上是同时凝固,从而可有效地避免在液态充型时产生缩孔缩松。实验结果与模拟结果吻合,半固态流变成形件的质量优于液态成形件的质量。
英文摘要：
The semi-solid filling and solidification process of magnesium composite was simulated and the semi-sold filling experiment was carried out. The results indicate that the distribution of pressure during the liquid filling process is inordinate, but the pressure reduces gradually in the filling direction during the semi-solid filling process, which is favorable to generate back pressure during filling process. According to the distribution of the solid volume fraction during the solidification, it is found that the casting solidifies at the same time during the semi-solid filling, which can reduce shrinkage cavity and porosity. And the simulation results are in accordance with the experimental results. The quality of semi-solid reho-forming casting is better than that of liquid forming casting.
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