熔炼制备组成（质量分数/%）为Sn-0.7Cu-1Zn-xBi （x=0.5，1，1.5，2）的合金钎料，研究了铋含量对钎料熔点、电导率、润湿性能的影响，确定了最佳铋含量；采用最佳铋含量合金钎料对1060铝导线和连接金具进行钎焊连接，研究了连接头的界面形貌、拉断力和温升。结果表明：随着铋含量的增加，钎料的熔点略微降低，电导率下降，润湿性能先增大后减小；最佳铋含量为1.0%，此时钎料的电导率居中但润湿性能最好；Sn-0.7Cu-1Zn-1Bi钎料钎焊铝导线连接头的最大拉力达计算拉断力的83%，符合标准要求，温升比传统压缩连接方式的低18.3%，能改善铝导线连接头的发热问题。

Sn-0.7Cu-1Zn-xBi (x=0.5, 1, 1.5, 2, mass fraction/%) alloy solder was smelted. Influence of Bi content on the melting point, conductivity and wettability of the solder was studied, and the optimal Bi content was determined. The alloy solder with the optimal content of Bi was used to braze the 1060 aluminum wire and the connection fitting, and the interface morphology, breaking force and temperature rise of the connector were studied. The results show that with increasing Bi content, the melting point of the solder decreased slightly, and the conductivity decreased; the wettability increased and then decreased. The optimal Bi content was 1.0wt%, and the solder had moderate conductivity and the best wettability. The maximum tensile force of the aluminum wire connector brazed with Sn-0.7Cu-1Zn-1Bi solder reached 83% of the calculated breaking force, which was consistent with the standard requirement. The temperature rise was 18.3% lower than that by traditional compression connection, indicating the brazing method can reduce the heat generation of the aluminum wire connector.