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研究了难熔金属V、Mo、Zr和Ta对常规Al-4％Ti和Al-5％Ti-1％B中间合金细化工业纯铝(99.8％)晶粒效果的影响。每种难熔金属的含量控制在零到0.30％范围内。在添加Al-4％Ti的情况下,熔体中的Ti含量控制在0.15％的水平;在添加Al-5％Ti-1％B的情况下,将熔体中的Ti含量控制在0.045％的水平。发现V和Mo能提高两种中间合金细化铝晶粒的效果;而Zr则降低它们的效果或使其中毒。Ta含量为0.1％左右时,使中间合金原来的晶粒细化效果减弱至最小,超过这一含量后则使被减弱的晶粒细化效果有所恢复。Al-4％Ti和Al-5％Ti-1％B中间合金原来的晶粒细化效果,分别在Ta含量为0.35％和0.2％左有时得到恢复,Zr和Ta使细化剂中毒的试验结果,可以用形成了替换的金属间化合物来解释。
The effects of refractory metals V, Mo, Zr and Ta on the grain refinement of commercial pure aluminum (99.8%) by conventional Al-4% Ti and Al-5% Ti-1% B master alloys were investigated. The content of each refractory metal is controlled in the range of zero to 0.30%. With the addition of Al-4% Ti, the Ti content in the melt was controlled at a level of 0.15%; in the case of Al-5% Ti-1% B, the Ti content in the melt was controlled to 0.045% s level. V and Mo were found to enhance the effect of both intermediate alloyed aluminum grains; whereas Zr reduced their effect or poisoned it. When the content of Ta is about 0.1%, the original grain refinement effect of the master alloy is weakened to a minimum, and beyond this content, the weakened grain refinement effect is restored. The original grain refining effect of Al-4% Ti and Al-5% Ti-1% B master alloys was restored at times when the content of Ta was 0.35% and 0.2%, respectively. The experiments of the refiner poisoning by Zr and Ta The result can be explained by the formation of an intermetallic compound.