及其细化晶粒作用
(沈阳工业大学金属材料工程系，沈阳 110023)
摘 要: 根据液体蒸气压与温度遵从克劳修斯-克莱贝龙方程的原理, 找到了制备Al-Ti-C 中间合金的一种新工艺。 合成的Al-Ti-C中间合金含有大量细小的TiC相及少量粗大的条状Al3Ti相, 它具有优异的细化α-Al晶粒的性能。TiC相质点团是α-Al有效的异质结晶核心, 这归因于质点团凹陷处的物理化学作用。
关键字: Al-Ti-C中间合金 晶粒细化剂 异质形核 真空熔炼
THEIR GRAIN REFINING PROPERTIES
（Department of Metal Materials Engineering, Shenyang Polytechnic University, Shenyang 110023, P. R. China）
Abstract: Based on Clausius-Clapeyron equation, a new technology to prepare Al -Ti-C master alloys was developed. Synthesized Al-Ti-C master alloys containing a number of fine TiC particles and a few Al3Ti flakes possess excellent grain refining properties on aluminium. The clusters of TiC particles are effective nuclei of α-Al, which is attributed to physical and chemical roles of depressions on the clusters.
Key words: Al-Ti-C master alloy grain refinement heterogeneous nucleation vaccum melting
