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研究了加稀土Ｌａ、Ｃｅ或Ｙ的工业纯铝及Ａｌ－Ｍｎ，Ａｌ－Ｍｇ，Ａｌ－Ｃｕ，Ａｌ－Ｌｉ，Ａｌ－Ｃｕ－Ｌｉ，Ａｌ－Ｍｇ－Ｓｉ，Ａｌ－Ｃｕ－Ｍｇ，Ａｌ－Ｚｎ－Ｍｇ等１４种合金的枝晶间距。讨论了微量稀土、原合金元素、冷却速度和有效晶粒细化剂对枝晶的细化作用。结果表明，在各种冷速条件下，微量Ｌａ、Ｃｅ或Ｙ能显著细化工业纯铝和各种铝合金的枝晶；提出的溶质传输特征参数Ｐ０可正确反映稀土对铝合金枝晶的细化能力与原有合金元素的种类和含量的关系；冷却速度越大，稀土。对铝合金枝晶的细化作用越小；有效晶粒细化剂对铝合金枝晶的细化作用远不能与其对铝合金铸态晶粒的有效细化相提并论。
The effects of industrial pure aluminum, Al-Mn, Al-Mg, Al-Cu, Al-Li, Al-Cu-Li, Al-Mg-Si, Al-Cu- Zn-Mg and other 14 kinds of alloy dendrite spacing. The effects of trace rare earths, original alloying elements, cooling rate and effective grain refiner on the densification of dendrites were discussed. The results show that trace amounts of La, Ce or Y can remarkably refine the dendrites of industrial pure aluminum and various aluminum alloys at various cooling rates. The proposed solute transport parameter P0 can correctly reflect the effect of rare earth on the dendrite growth of aluminum alloy The relationship between refining ability and the types and contents of the original alloying elements; the greater the cooling rate, the rare earth. The smaller the refining effect on the aluminum alloy dendrites; the refining effect of the effective grain refiner on the aluminum alloy dendrites can not be compared with the effective refinement of the as-cast aluminum alloy grains.