This presentation provides an overview of friction welding. It discusses that friction welding is a solid state welding process where one part is rotated at high speeds up to 3000 rpm while being pressed against another part, generating heat through friction. This heat causes the parts to join without melting. Applications include automotive, agricultural, aerospace, and industrial parts. Advantages are that no filler material is needed, it is environmentally friendly with no fumes, and results in a narrow heat affected zone. Limitations are that it is only for joining round or rotatable parts of the same diameter.