Turbine rotor fabrication

B - Operations – Transporting – 23 – P

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26/148

B23P 15/04 (2006.01) B23K 35/30 (2006.01) B23P 15/00 (2006.01) F01D 5/30 (2006.01)

Patent

CA 1076334

TURBINE ROTOR FABRICATION Abstract of the Disclosure A method for manufacturing a hybrid, dual property turbine wheel assembly comprising the steps of preforming a blade element and separate support ring of a superalloy material and locating the blades in support slots in the outer diameter of the support ring and radially outwardly of a preformed inner diameter underlying base tangs on each blade element; vacuum braze sealing each of the base tangs within a support slot and thereafter machining the inside diameter of the ring to expose the base tangs; there- after joining the ring and undercut base tangs thereon to the outside diameter of a preformed disc element and vacuum braze sealing the hub disc and ring blade assemblies to produce a sealed interface region between the outside diameter of the hub element and the inside diameter of the ring and base tangs; and thereafter directly hot isostatic- ally pressing the joined parts to form a direct diffusion bond between the tangs, ring and disc.

294485

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