Methods for repairing gas turbine engine components

Details Methods for repairing gas turbine engine components Methods for repairing gas turbine engine components

2007-07-17

2007-07-17

Yee, Deborah (Department: 1742)

Metal treatment

Stock

Age or precipitation hardened or strengthened

C148S442000, C148S707000, C148S516000, C148S537000

Reexamination Certificate

active

10858365

ABSTRACT:
Systems and methods for repairing Thermo-Span® gas turbine engine components are described herein. Embodiments of these methods minimize post-weld residual stresses in a weld repaired Thermo-Span® component by solution heat treating the component by heating the component to about 2000° F.±25° F., holding the component at about 2000° F.±25° F. for about one hour; and cooling the component to below about 700° F. at a rate equivalent to cooling in air; and precipitation heat treating the component by heating the component to about 1325° F.±25° F., holding the component at about 1325° F.±25° F. for about 8 hours, cooling the component to about 1150° F.±25° F. at a maximum rate of about 100° F./hour, holding the component at about 1150° F.±25° F. for about 8 hours, and cooling the component at a predetermined cooling rate. Dimensions of the fully-machined and weld repaired component are maintained during solution heat treating and precipitation heat treating via custom designed furnace tools.

REFERENCES:
patent: 4750944 (1988-06-01), Snyder et al.
patent: 5549767 (1996-08-01), Pietruska et al.
patent: 5922150 (1999-07-01), Pietruska et al.
patent: 6049979 (2000-04-01), Nolan et al.
patent: 6531005 (2003-03-01), Bezerra et al.

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