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研究了不同Ｙ含量对铸造Ｎｉ５０Ａｌ２０Ｆｅ３０合金组织与性能的影响。结果表明，微量Ｙ的加入可以改善Ｎｉ５０Ａｌ２０Ｆｅ３０合金的强度与塑性。Ｙ含量为０．０５ｗｔ％～０．１ｗｔ％是合金的最佳含量范围。微量Ｙ的加入影响合金的共晶区，可明显改变合金的微观组织形态。在Ｙ含量为０．１ｗｔ％时，合金主要处于β（ＮｉＡｌ）相与γ相的共晶区，这对合金的室温塑性极为有利。
The effect of different Y content on the microstructure and properties of cast Ni50Al20Fe30 alloy was studied. The results show that the addition of trace amount of Y can improve the strength and ductility of Ni50Al20Fe30 alloy. Y content of 0.05wt% ~ 0.1wt% of the alloy is the best content range. Addition of trace amount of Y affects the eutectic zone of the alloy, which can obviously change the microstructure of the alloy. When the Y content is 0.1wt%, the alloy is mainly in the eutectic zone of β (NiAl) phase and γ phase, which is very favorable for room temperature plasticity of the alloy.