通过添加不同成分焊丝对铝锂合金２０９０＋０．１％Ｃｅ（简记为２０９０Ｃｅ）焊缝凝固组织的研究发现：含有Ｌｉ、Ｃｅ和Ｚｒ元素的２０９０Ｃｅ合金焊缝熔合区有特殊的细小等轴晶粒薄层，而不含有上述元素的硬铝合金ＬＹ１２ＣＺ焊缝熔合区为传统的以联生结晶方式形成的柱状晶组织。结晶动力学分析表明，等轴细晶组织的产生是焊缝熔合区中Ｌｉ、Ｃｅ和Ｚｒ元素综合作用导致以ＺｒＡ１３质点的形核作用占主导地位，从而抑制联生结晶过程的结果。 The study on the solidified microstructure of the weld of Al-Li alloy 2090 + 0.1% Ce (abbreviated as 2090Ce) by adding different composition welding wire found that the weld zone of 2090Ce alloy containing Li, Ce and Zr has special fine equiaxed grains Thin layer, but does not contain the above elements of the hard aluminum alloy LY12CZ weld fusion zone is the traditional columnar crystal structure formed by the co-crystal manner. Crystallization kinetics analysis shows that the formation of an equiaxed fine grain structure is the result of the combined action of Li, Ce and Zr elements in the weld zone leading to the nucleation of the ZrA13 particles, thus inhibiting the crystallization process.