LASER CLADDING A TURBINE ENGINE VANE PLATFORM

摘要

A method of refurbishing turbine engine vanes (2) in which an alloy blend of a cobalt based superalloy and a nickel base superalloy corresponding to the ba se material of the turbine vane cobalt platform and the base nickel material of the replacement turbine vane airfoils is laser clad to the gaspath surfaces of the turbine vane platform. Laser cladding with the alloy blend allows the us e of replacement airfoils with improved castings in the form of improved nicke l based superalloys, and allows a coating to be uniformly applied to the gaspa th surfaces of the vane. According to the method, the platforms (4, 6) are separated from the airfoils (8, 10) and laser clad with a blend of cobalt based superalloy and nickel based superalloy. The vane is then reassembled using the laser clad platform and at least one replacement airfoil.