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. Play Friction Welding Process Video 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.