Method of making double-walled turbine components from pre-conso

Details Method of making double-walled turbine components from pre-conso Method of making double-walled turbine components from pre-conso

1996-06-24

1999-08-03

Jenkins, Daniel J.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Making composite or hollow article

419 28, 419 49, 419 55, B22F 702, B22F 706

Patent

active

059336994

ABSTRACT:
Methods of making gas turbine structures with cooling channels, such as, for example, combustor/transition pieces for gas turbines having a double wall with a plurality of cooling channels, having axially and/or circumferential cross-flow passages positioned between the structure's inner member and the outer member to provide cooling air thereto, are disclosed. A representative method of producing such annular structures having a hot and a cold wall, and joining ribs, for the inner and the outer components of an annulus, such as for jet engine turbine combustors, to net shape as an annular pre-form includes: forming a pre-form assembly including materials for the hot wall, cold wall, and ribs and sacrificial segments for maintaining cooling channels during forming of the pre-assembly and later processing; rolling the pre-form to a required thickness and length as a flat pre-form; hoop-rolling the preform to a required thickness and a required length; welding the assembly; ring rolling to the pre-form to a desired inner diameter; ring-rolling or metal spinning the pre-form to produce the proper wall contour and removing the sacrificial material to open the cooling channels.

REFERENCES:
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patent: 5253478 (1993-10-01), Thibault, Jr. et al.
patent: 5269050 (1993-12-01), Wiggs et al.
patent: 5328331 (1994-07-01), Bunker et al.
patent: 5427736 (1995-06-01), Ritter et al.
patent: 5460002 (1995-10-01), Correa
patent: 5480468 (1996-01-01), Ritter et al.
patent: 5724816 (1998-03-01), Ritter et al.

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