American Friction Welding (AFW) is a bi-metallic friction welder of dissimilar metals and near-net-shape parts. The company uses direct-drive rotary friction welding to deliver high precision, full strength penetration welds in the most demanding applications and industries. Dramatic cost savings result by reducing the amount of working material, machining, and surface finishing needed to produce finished metal components.
Rotary friction and inertia welding are a solid-state process joining two metal objects by applying rotational motion and pressure to the objects. High temperatures generated by friction, transform the point of contact into a plasticized state. This area is known as the weld interface. The pressure is used to forge a metallic bond between the atoms of the objects. The overall molecular integrity of the original objects remains intact due to the narrow heat affected zone of this welding technology. Friction welding provides a complete cross-sectional weld without using fluxes or filler metal.
Automated friction welding is used to fuse aluminum alloy, brass, bronze, copper, nickel, silver, steel alloy, carbon steel, stainless steel, tantalum, titanium, tungsten, and many other metal alloys. It is successful in bonding two different metals where conventional welding may not work. It provides a high speed, lower cost weld solution to join motor shafts, axle shafts, prop shafts, gear to shaft, disc to shaft, solid round to solid round, pipe to pipe, and solid round to pipe welding. The process serves as an alternative welding method to brazing, electron beam, explosive, and butt welding.