The butt joint of aluminum bar was welded with SHS ( self - propagating high - temperature synthesis) welding method. The productivity and conductivity of different thermite formulations were investigated. And the conductivity of the welded joint using optimum thermite formulation were measured and analyzed. The results show that in the SHS welding formulation, a moderate amount of fine and coarse aluminum powder used in conjunction can help to improve the reaction productivity. Both the sample productivity and the conductivity are declined by the addition of Cu. Whats more, with Cu as an alloy element, the addition of KC1O3 contributes to improve the productivity. In SHS welded joint, the average conductivity of welded joint is 29.974 MS/m, 82. 8% that of base metal, which the conductivity of the welds meet the requirements of the use of aluminum bus.%利用自蔓延焊接技术焊接纯铝母材,研究了不同配方焊粉的焊缝熔敷金属生产率和电导率,并将优选出来的配方的焊接接头导电性进行了测试和分析.结果表明,在自蔓延焊粉配方中,粗铝粉和适量的细铝粉联合使用能有助于提高反应的生产率,Cu元素的添加使熔敷金属的生产率下降,同时也使试样的导电性下降；在添加Cu作为合金元素的配方中,KClO3的添加有助于提高生产率；在自蔓延的焊接接头中,焊缝的平均电导率为29.974MS/m,为母材的平均电导率的82.8％,焊缝金属的电导率满足铝母材的使用要求.
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