Repair of coated turbine vanes installed in module

摘要

A method of repairing a damaged coated vane (16) from a turbine module (10) without removing the vane (16) from the module (10) is taught. The method includes locally removing the coating in the vicinity of the damage as well as any underlying damage in the superalloy substrate. A diffusible coating precursor is then applied to the damage site. A heat treating fixture (240) is then mounted on the vane (16) and the repair site is heated to up to 2000°F (1090 °C) in an inert environment to interdiffuse the coating precursor and the substrate. After the diffusion anneal, the vane (16) is cleaned and the module (10) is returned to service. And a corresponding system for repairing a damaged coated vane (16) from a turbine module (10) without removing the vane (16) from the module (10).