Present Status of Research on Welding Technique For Al/Cu Dissimilar Materials

Many kinds of welding methods were introduced for Al/Cu dissimilar materials,including fusion welding,pressure welding,friction welding,explosive welding,diffusion welding,ultrasonic welding,stored energy welding,resistance welding,brazing,and so on.The characteristics and present research situation of these welding methods were expounded.Fusion welding isn't mostly applied because it is greatly difficult to weld Al/Cu dissimilar materials by the fusion welding.The joint quality is excellent by heat pressure welding,friction welding,ultrasonic welding,and so on,but the cost is very high.At present,resistance welding has obtained the huge success to weld Al/Cu dissimilar material tubes and is applied in the many factories.In recent years,brazing becomes the hot research spot by many fine characteristics.Resistance welding and brazing possibly become the development trend.