将TiC_p/Al预制块以不同的工艺加入到Mg液中进行熔化试验。结果表明 ,未搅拌时TiC_p/Al预制块在 80 0℃的Mg液中保温 60min后仍不熔化 ,采用合适的搅拌工艺可使TiC)_p/Al预制块熔化 ,并且使TiC粒子在熔体中均匀分布。TiC_p/Al预制块在Mg液中的熔化过程机理为 :基体Al通过熔化和对流扩散进入到Mg液中 ,TiC粒子间的结合力需通过搅拌产生的剪切力才能破坏 ,并随Mg液流动进入到Mg液中。机械搅拌可使TiC粒子在Mg液中均匀分布。 The TiC_p / Al preform was added to the Mg liquid in a different process for the melt test. The results show that the TiC_p / Al preform does not melt in the Mg solution at 80 ℃ for 60min without stirring. The TiC_p / Al preform can be melted by a proper stirring process, and the TiC particles can be melted in the melt Evenly distributed. The mechanism of melting process of TiC_p / Al preform in Mg liquid is as follows: the Al matrix melts and convects into Mg liquid, the bonding force of TiC particles can be destroyed by the shear force generated by agitation, Into the Mg solution. Mechanical stirring TiC particles in the liquid evenly distributed.