真空电弧焊接与钎焊技术

主要研究真空条件下的自持放电电弧作为新型热源用于熔化焊及钎焊的工艺适应性。研究结果表明，该热源用于熔焊时，电弧挺度大，穿透能力强，焊缝正反面成形好，接头强度及塑性指标均优于常规焊接方法。而将其作为局部加热热源用于真空钎焊时，又具有电弧柔性大、升温速度快、参数可控性好、焊适民形好等优点。

Hollow Cathod Vacuum Arc Welding and Brazing

In this paper, the self-maintaining arc in vacuum with hollow cathod and its application for welding and brazing were studied. The experimental results showed that for fusion welding, the vacuum arc is possessed of good stiffness, strong penetration and a good appearance of weld on both sides. The strength and plasticity of the joints welded by vacuum arc are much better than those of the joints welded by the traditional arc. And for brazing, the vacuum arc provides excellent flexibility, fast heating, easy controlling of parameters and high quality of brazed joints etc. As the duration at high temperature is very short, the harmful intermetallic compounds inside the joint could be avoided. Hollow cathod vacuum arc is a new kind of welding heat source which promises good prospect.