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针对三种不同的AlTiB细化剂中的TiB2含量和分布进行分析,探究TiB2相对细化效果的影响。结果表明:AlTiB中随TiB2含量的增加,其对工业纯铝晶粒的细化效果显著提升。TiB2的分布对细化效果有明显影响:团聚分布的TiB2有趋于远离TiAl3相的特征,细化效果较差且易衰退;非团聚分布的TiB2颗粒间相对独立,分布均匀,细化效果较好且更持久。
The content and distribution of TiB2 in three different AlTiB refiners were analyzed to explore the effect of TiB2 refining. The results show that with the increase of TiB2 content in AlTiB, its refinement effect on industrial pure aluminum grains is significantly improved. The distribution of TiB2 has a significant effect on the refining effect: the agglomeration distribution of TiB2 tends to be far away from the TiAl3 phase, and the refining effect is poor and easily decayed. The non-agglomerated distribution of TiB2 particles is relatively independent and evenly distributed, and the refining effect is better Good and more lasting.