Verfahren zur Aufbereitung und Verfahren zur Herstellung einer Turbinenschaufel

摘要

A method of reconditioning a rotating blade (1) with a shroud (8) following the operation in a gas turbine, comprises the application of a barrier (14) placed on the edge of the shroud (8) facing the edge of a shroud (8) of an adjacent blade having creep deformation. The barrier (14) prevents hot gas ingestion into a shroud cavity (10). It is pre-fabricated or built-up layer-by-layer by means of welding or laser cladding or other known methods. Additionally, the mass of the shroud (8) is reduced in order to re-establish the initial mass of the shroud. A thermal barrier coating (15) is additionally applied to the surfaces of the shroud (8) that are exposed to the hot gas of the turbine. The method significantly increases the lifetime of the blade (1). <IMAGE>