Turbine nozzle and related casting method for optimal fillet wal

Metal founding – Process – Shaping a forming surface

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164 35, 164 45, B22C 900, B22C 902, B22C 700

Patent

active

056621604

ABSTRACT:
In a method of investment casting a turbine nozzle which includes an outer band, an inner band and an airfoil section extending between the inner and outer bands, an improvement including shaping a temporary wax form, and external shell and internal core components used in casting such that during pouring of molten metal into a space created by removal of the wax form, shell material lies on opposite sides of an outer fillet connecting the outer band to the airfoil section. The resulting gas turbine nozzle includes first and second horizontally oriented ribs extending about interior peripheries of the airfoil section vertically adjacent the outer and inner band fillets.

REFERENCES:
patent: 3981344 (1976-09-01), Hayes et al.
patent: 5247984 (1993-09-01), Stancia
patent: 5295530 (1994-03-01), O'Connor et al.

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