向熔融三号工业纯Ｃｕ中加入微量Ｌｉ，得到表面光滑、内部致密的铜锭。研究Ｌｉ对工业纯Ｃｕ结晶形态的影响，结果表明：Ｌｉ能消除合金凝固的枝晶区并使之转变为等轴晶区。最后从凝固理论及凝固过程热分析出发，初步探讨其成因 Add a small amount of Li to molten No. 3 industrial pure Cu to obtain a copper ingot with a smooth surface and an inner density. The effect of Li on the crystallization morphology of industrial pure Cu was studied. The results showed that Li could eliminate the dendritic zone solidified by the alloy and transform it into the equiaxed zone. Finally, from the solidification theory and the thermal analysis of the solidification process, the causes of the initial discussion