Like other friction welding techniques, friction seam welding joins workpieces together in the solid phase without melting either of the materials. Heat is generated by friction between the workpieces and a rotating consumable bar, which is axially pressed into a V or U shaped groove. A deposit is laid down into the groove while moving the workpieces underneath the rotating consumable (Figure 1).
There is a potential for joining materials, which are difficult to weld with conventional arc welding techniques. One of the process advantages is that there is no fusion. Hence, there is virtually no interdiffusion between the consumable and substrate.
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