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研究了Ａｌ－５Ｔｉ－１Ｂ和Ａｌ－３Ｂ中间合金对铸造铝合金Ａｌ－１２％Ｓｉ的α－Ａｌ晶粒的细化效果。结果表明，Ａｌ－３Ｂ中间合金的细化能力和抗延时衰减性能皆优于Ａｌ－５Ｔｉ－１Ｂ中间合金。分析认为，ＡｌＢ２和ＴｉＢ２相质点均为铸造Ａｌ－Ｓｉ合金中α－Ａｌ潜在的结晶核心，而Ａｌ３Ｔｉ相易被Ｓｉ原子毒化，失去作为结晶核心的作用。
The refining effect of Al-5Ti-1B and Al-3B master alloy on the α-Al grain refinement of Al-12% Si cast aluminum alloy was studied. The results show that Al-3B master alloy has better refining and anti-aging properties than Al-5Ti-1B master alloy. It is considered that the AlB2 and TiB2 particles are all potential α-Al nuclei in the cast Al-Si alloy, while the Al3Ti phase is easily poisoned by Si atom, losing its function as the nucleus of crystallization.