The microstructure and mechanical properties of purity aluminum refined with salt con-taining Ti and B elements have been studied in detail with Optical Microscope and MTS (Mechanical Testing and Simulation). The salt containing weight ratio of 22.2 Ti∶1B has the most refining effect on the purity aluminum with the finest structure and the best mechanical properties, meanwhile it also possesses the advantages of short reacting time (within 5 min-utes) and long fading time (more than 20 hours). The refining effect of the salt increases with the content of Ti and B in the melting and the refining mechanism is mainly contributed to the heterogeneous nuclei of more fine TiA13 particles dispersed in the melting, which come from the reaction between the salt and aluminum. Purity B contained salt has little or no directly refining effect. However. B contained salt has indirect refining effect on the purity aluminum when it is added simultaneously with Ti contained salt, this may be due to that the dispersive and fine boride (TiB2) could be taken as the heterogeneous nuclei for TiA13 particle, and then prevents the coarsening of the TiA13 particle.

介绍了铝合金在汽车工业中的应用前景，简述了国内外在铸造铝合金、高强度铝合金、铝基复合材料、非树 枝晶铝合金等新材料应用研究动向及回归热处理、形变热处理、半固态成形等新技术、新工艺方面开展的研究工 作。