A method for the production of fan disks made of titanium, by the use of a diffusion bonding

摘要

A method of making a titanium fan disc for a gas turbine engine comprises providing a pair of identical forged titanium cylinders each having a central bore and a flat end surface at right angles to its central axis, preparing the flat end surface of each cylinder to a high degree of smoothness, abutting the prepared surfaces of the cylinders one against the other in axial alignment, removing air from between said surfaces, and diffusion bonding the cylinders end-to-end by hot isostatic pressing to form the disc. A flange may be provided on each cylinder with a recess to accept a titanium ring 24 which shields the cylinder from an electron beam used to form a weld 28 to seal the joint line for evacuation. The flange is ultimately machined away. IMAGE