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采用焊缝合金化手段，通过设计新型焊丝向焊缝中添加Ｌｉ、Ｚｒ和Ｃｅ等合金化元素，研究了２０９０Ｃｅ稀土铝锂合金焊缝金属的热裂纹敏感性；探讨了合金元素对接头力学性能的影响及作用规律；进而研究了适用于焊接２０９０Ｃｅ合金的焊丝合金成分。试验结果表明，向焊缝金属中添加适量的合金元素Ｌｉ、Ｚｒ和Ｃｅ，能够细化晶粒；增加焊缝中的共晶数量并改善其分布形态，从而有助于降低焊缝金属的热裂纹敏感性。另外，适量的Ｌｉ、Ｚｒ和Ｃｅ等合金元素还能够在不降低接头塑性的同时，明显改善接头的强度；但Ｌｉ和Ｃｅ含量过多则会对接头性能，特别是塑性造成损害。所设计的焊丝材料能够适用于焊接２０９０Ｃｅ稀土铝锂合金。
By means of the alloying of the weld, the hot cracking susceptibility of the weld metal of 2090Ce rare earth Al-Li alloy was studied by designing a new welding wire to add alloying elements such as Li, Zr and Ce into the weld. The mechanical properties of the joint The effect and the law of action; and then studied the welding wire alloy composition of 2090Ce alloy. The experimental results show that adding appropriate amount of alloying elements Li, Zr and Ce to the weld metal can refine the grain; increasing the eutectic number in the weld and improving its distribution form can help to reduce the heat of the weld metal Crack sensitivity. In addition, proper amounts of alloying elements such as Li, Zr and Ce can also significantly improve the strength of the joint without reducing the plasticity of the joint; however, excessive amounts of Li and Ce can cause damage to the joint performance, particularly plasticity. The design of the wire material can be suitable for welding 2090Ce rare earth aluminum lithium alloy.