METHOD OF RESTORING ALLOY DEPLETION IN AN AIRFOIL AROUND COOLING HOLES

Abstract: a method of reducing depletion of elements from an airfoil includes disposing a bond coating on the airfoil, where the airfoil comprises cooling channels. the airfoil includes a material that has an initial composition. a cooling hole is machined in the airfoil to contact the cooling channels such that a fluid travelling in the cooling channel may be discharged via the cooling hole. the machining of the cooling hole results in a formation of a depleted region around the cooling hole. the depleted region is depleted of a portion of the initial composition of the airfoil. a top coat is disposed on the bond coat. the airfoil is subjected to a heat treatment at a temperature effective to promote diffusion of elements from a non-depleted region to the depleted region around the cooling hole.

Inventor(s): Brian Richard Craig, Michael J. Minor, Randall D. Kelton, Arka Ray, Xuan Liu

CPC Classification: F01D5/005 ({Repairing methods or devices})

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