采用电子万能试验机测试了不同锆含量的导线用铝合金在不同加热处理后电导率和抗拉强度的变化，利用透射电子显微镜对其显微组织进行了观察，研究了锆对导线用铝合金显微组织及耐热性能的影响。结果表明：添加微量锆元素以后，铝合金的晶粒得到细化，电导率下降，塑性和耐热性提高；添加质量分数为0．04％锆的铝合金的连续容许使用温度提升到150℃，添加质量分数为0．08％锆的铝合金的使用温度可达到180℃。
Variation of electrical conductivity and tensile strength of aluminum with different Zr contents after the microstructure was different heat treatments was tested by electronic universal testing machine. Meanwhile, observed by transmission electron microscopy, and the effect of Zr on microstructures and heat-resistance of aluminum alloy used for wires were studied. The results show that the grains became finer, electrical conductivity decreased, plasticity and heat-resistance increased after adding small amount Zr. The continuous allowable temperature of the aluminum alloy with 0. 04wt% and 0. 08wt% Zr addition increased to 150℃ and 180℃ respectively.
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