中文摘要：

为 AlTiC 主人合金的精制表演的进一步的知识， Al5.5Ti0.25C 和 Al6.5Ti0.5C 在精制 99.8% 商业纯的的铝(CPAl ) 的实验的谷物掌握包含高 Ti 的合金， C 内容被准备并且使用。他们的表演与 Al5TilB 的二种类型相比重新好其表演现在被认为是最好。主人合金的这二种类型在 0.2percent 的增加水平显示出类似的精制效率。在 0.5% 的增加水平，然而，在那里， still 存在在 99.98% 和 99.995% 高纯净铝(HPAl ) 的谷物精炼的 AlTiC 和 Al5TiB 合金之间的大表演差别。圆柱的谷物的生长充分在 0.5% 的增加水平由于 AlTiC 的精炼被压制。在一样的增加水平，另外，精制的谷物 Al3Ti0.15C 和 Al5Ti0.2C 主人试验发现了起始的在工业上的应用被进行在的合金上述纯铝的三种类型。根据试验性的结果，这二不同作文重新好两个都是非理想的。从各个提取的第二个阶段粒子更精制通过 TEM 被观察，当在谷物精炼以后的谷物的原子核通过 SEM 被观察时。结果通过宪政过度冷却的参数和其价值被溶质元素在铝决定的生长限制参数的计算和比较被分析与不同纯净融化。显然，有 Ti 和 C 元素的高内容的 AlTiCmaster 合金让伟人精制潜力。

英文摘要：

For further knowledge about the refining performance of AlTiC master alloys, Al5.5Ti0.25C and Al6.5Ti0.5C master alloys containing high Ti and C content were prepared and used in grain refining experiments of 99.8% commercial pure aluminum（CPAl）. Their performance was compared with two types of Al5Ti1B refiners whose performance was nowadays considered to be the best. These two types of master alloys show similar refining efficiency at the addition level of 0.2%. However, at the addition level of 0.5%, there still exists great performance difference between AlTiC and Al5TiB alloys in grain refinement of 99.98% and 99.995% high purity aluminum（HPAl）. The growth of columnar grains is fully suppressed due to the refinement of AlTiC at the addition level of 0.5%. Also, at the same addition level, the grain refining experiments of Al3Ti0.15C and Al5Ti0.2C master alloys which have found initial commercial applications are conducted in the above-mentioned three types of pure aluminum. According to the experimental results, these two refiners of different compositions are both nonideal. The second phase particles extracted from each refiner were observed through TEM, while the nuclei of grains after grain refinement were observed through SEM. The results were analyzed through computation and comparison of the constitutional-supercooling parameter and the growth-restriction parameter whose values were determined by solute element in aluminum melt with different purity. Apparently, AlTiC master alloys with high content of Ti and C element have great refining potential.