Refractory metal backing material for weld repair
AssigneeUnited Technologies Corporation
InventorsDilip M. Shah, James T. Beals, Norman Pietruska, Edward R. Szela
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Abstract
The present invention relates to a method for repairing components such as blades used in turbine engines. The method comprises the steps of placing a piece of refractory metal material over an area of the component to be repaired and depositing a repair filler metal material over the piece of refractory material in an amount sufficient to repair the component and welding the repair filler metal material in place. The refractory metal material may be selected from the group consisting of niobium, tantalum, molybdenum, tungsten, a metal having a melting point higher than the melting point of nickel, and alloys thereof and may be uncoated or coated.
Claims29
A method for repairing a component comprising the steps of:
- placing a piece of refractory metal material over an area of said component to be repaired;
- and
- depositing a repair filler metal material over said piece of refractory metal material in an amount sufficient to repair said component and subjecting said repair filler metal material to a welding treatment.
A method for repairing a tip portion of a turbine blade comprising the steps of:
- positioning a refractory metal backing material over an area to be repaired;
- and
- depositing a repair filler metal material over said refractory material and welding said repair filler metal material.
A method for repairing a trailing edge of a turbine blade comprising:
- cutting a refractory metal material foil to conform to a trailing edge shape of said blade;
- positioning said cut refractory metal material foil over a portion of said trailing edge to be repaired;
- and
- applying a repair filler metal material over said refractory metal material foil and welding said repair filler metal material to effect said repair.
Dependencies are inferred from the claim text.