Effect Mechanism of TiAl3 on the Precipitation of TiC Particles in Aluminum Melt
DING Wan-wu1,2, XIA Tian-dong1,2, ZHAO Wen-jun1,2
1. State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials, Lanzhou University of Technology, Lanzhou 730050, China;
2. Key Laboratory of Non-ferrous Metal Alloys(Ministry of Education), Lanzhou University of Technology, Lanzhou 730050, China
Abstract:The effect of TiAl3 on the precipitation of TiC particles in aluminum melt was studied when TiC and TiAl3 refining industry aluminum, and the mechanism was discussed using MEF3 and EPMA. The results show that TiC particles deposit quickly and have poor nucleation capability when TiC is used as the α(Al) nucleation phase only, but when TiC and TiAl3 common as the α(Al) nucleation phase, TiC particles deposit more and more slow. Even after long time, there was only a small amount of precipitation. It demonstrated better nucleation and higher resistance to grain refining fading. The reason is that TiAl3 increase the settlement resistance of TiC particles. The refinement effect fading of Al-Ti-C master alloy is caused by TiC precipitation.
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