Process definition:

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Rotary Friction welding (RFW) is a solid-state welding process where two or     more parts are axially pressed onto each other under high relative rotational movement. The thereby induced frictional heat plasticizes the material and results into an axial shortening and extrusion of a weld flash. Once the plastification   is sufficient the rotational movement is stopped while the force is maintained or increased which forms a solid bond between the parts.

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Applications:

• axial joints between arbitrary shaft, disk, tube or bar components

• material combinations between most metallic alloys see matrix below

• established process in almost all industrial    sectors, in particular automotive industry