Spun metal form used to manufacture dual alloy turbine wheel
AssigneeHoneywell International Inc.
InventorsDerek A. Rice, Venkatesh S. Krishnan, David R. Waldman, Gary G. Capek, Devinder N. Katariya
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Abstract
A spun metal form used to manufacture a dual alloy turbine wheel. The spun metal form prevents braze alloy contamination of the hub/casting interface by relocating the braze joint away from the interface. The spun metal form allows for the re-working of components after failed vacuum brazing and increases the time to failure of dual alloy turbine wheels.
Claims34
A method of manufacturing a dual alloy turbine wheel comprising the steps of:
- providing a casting, a hub, and a spun metal form, said casting having a casting flange, said spun metal form having a form flange;
- assembling said casting, said hub, and said spun metal form such that an assembly with an interface is produced;
- applying a braze bead to said assembly such that said braze bead is in contact with said casting flange and said form flange;
- vacuum brazing said form flange to said casting flange;
- and
- hot isostatic pressing said assembly.
A method of protecting a bond at the interface between a casting and a hub comprising:
- placing over said hub and a portion of said casting a form can including a form flange and a form flange edge such that said form flange edge extends about 0.090 inches (0.229 cm) away from said interface;
- and
- brazing said conformal form to said casting.
A dual alloy turbine wheel comprising:
- a hub;
- a casting bonded to said hub;
- and
- a form can, including a form flange and a form flange edge wherein said form can encloses said hub and extends about 0.090 inches (0.229 cm) over said casting, wherein said form can is brazed to said casting.
A method of manufacturing a dual alloy turbine wheel comprising the steps of:
- assembling a casting, a hub, and a form can to provide an assembly having an interface;
- said casting having a casting flange, and said form can having a form flange;
- applying a braze bead to said assembly such that said braze bead is in contact with said casting flange and said form flange;
- and
- vacuum brazing said form flange to said casting flange.
A method of preventing contamination of a casting/hub interface comprising:
- covering said casting/hub interface with a form can, said form can including a form flange and a form flange edge;
- and
- brazing said form flange to a casting such that said form flange edge extends away from an interface edge of said casting/hub interface.
Dependencies are inferred from the claim text.