Patent ID: 6648206
Filing Date: 2003-11-18
Classification: B23K

Abstract:
A friction stir welding tool that is capable of functionally friction stir welding metal matrix composites (MMCs), ferrous alloys, non-ferrous alloys, and superalloys, said friction stir welding tool comprising:a friction stir welding tool having a shank, a shoulder and a pin, wherein the shoulder is mechanically locked to the shank to thereby prevent rotational movement of the shoulder relative to the shank; a superabrasive material disposed on at least a portion of the shoulder and the pin, wherein the superabrasive material has a first phase and a secondary phase, wherein the superabrasive material is manufactured under an ultra high temperature and an ultra high pressure process; at least a second material disposed over the superabrasive coating to thereby contribute properties of the second material to the superabrasive coating; and wherein the friction stir welding tool is capable of functionally friction stir welding MMCs, ferrous alloys, non-ferrous alloys, and superalloys.