研究了稀土对ＣｕＮｉＺｎ合金机械性能及显微结构的影响。用扫描电镜、金相显微镜及Ｘ射线衍射等方法观察、分析了稀土元素在合金中的分布及作用。试验结果表明，稀土对ＣｕＮｉＺｎ合金机械性能及显微结构均有影响，主要表现在细化铸锭组织及再结晶组织，提高抗拉强度及硬度，而延伸率有所下降；但合金中的稀土添加量不能大于１０％，超过该范围时合金的热塑性变差，难以加工成形 The effects of rare earth on the mechanical properties and microstructure of CuNiZn alloy were studied. Using scanning electron microscopy, optical microscopy and X-ray diffraction observation and other methods, the distribution of rare earth elements in the alloy and its role. The experimental results show that the rare earth on the mechanical properties and microstructure of CuNiZn alloy have an impact, mainly in the refinement of ingot and recrystallized microstructure to improve the tensile strength and hardness, while the elongation rate decreased; but The addition of rare earth alloy can not be greater than 1  0%, beyond which the thermoplastic alloy worse, difficult to shape