超声辅助电阻钎焊中爆破现象的形成与消除（英文）

使用两步超声波钎焊方法及其相关装置,采用Al-Si-Mg钎料对6063铝合金进行超声辅助电阻钎焊。研究爆破现象以及超声波的方向、时间和焊接接头几何形状对爆破现象的影响。结果表明:在高电流密度、高热量和相互作用力的共同作用下,液态钎料发生了爆破现象。超声波的方向和时间以及焊缝几何形状对爆破现象有显著影响。当超声波时间不小于6s时,可以去除母材表面的氧化膜,消除爆破现象。提出描述爆破形成和消除的模型,且通过改变超声时间和焊接接头几何形状来控制爆破现象。

Formation and elimination of burst phenomenon in ultrasonic-assisted resistance brazing

A two-step ultrasonic-assisted brazing method and its associated apparatus were developed to make 6063 aluminum alloys joints with Al-Si-Mg filler metal. The burst phenomenon and the effect of ultrasonic direction and time, as well as the welding joint geometry on the burst phenomenon were investigated. The results show that the burst phenomenon occurs in the liquid filler metal under the effects of high current density, heat, and interaction force. The burst phenomenon is eliminated when the oxide film on the edge of the cross-section of the two parent metals is removed with more than or equal to 6 s ultrasonic time. A model of formation and elimination for burst was proposed, through which the blasting phenomenon can be controlled by changing the ultrasonic time and the geometrical shape of the welded joint.