Abstract
Electric contact is an important component of high voltage circuit breaker switch lubicle, isolating switch and ground switch. It is composed of arc-extinction end and conduction end. The usual material of arc-extinction end is copper-tungsten and the usual material of conduction end is copper or chrome-copper. Currently, four process for making the integral electric contact such as common brazing, vacuum brazing, electric-beam welding; liquid-phase sintering is of the best integral technique capability. This article puts forward a process by friction welding for integral Cu-W electric contact, and studies about the weldability between copper-tungsten and copper or chrome-copper, and between copper and chrome-copper. In order to solve the worse weldability between copper-tungsten and copper or chrome-copper, the design conception of intermediate layer is tentatively suggested. From experimental results, using the production method of friction welding is practicable to integral electric contact. It has some advantages, such as high availability of material, high productivity, high ratio of finish products, and it has no any influence on environment.
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