METHOD AND DEVICE FOR APPLYING A PROTECTIVE MEDIUM TO A TURBINE BLADE, AND METHOD FOR INTRODUCING COOLING BORES INTO A TURBINE BLADE

摘要

The invention relates to a method and a device for applying a protective medium to a turbine blade as well as a method for introducing cooling bores into a turbine blade. In order to do so, hot supercritical carbon dioxide is used as a temperature control medium and/or cleaning medium in a pressure vessel and is compressed and decompressed once or several times in a row. According to the invention, the cleaning medium is decompressed to a pressure at which the gas has a volume that is a multiple of the volume of the compressed cleaning medium in the pressure vessel, thus making it possible to remove particle-shaped and other dirt even from depressions, pocket holes, or open hollow spaces.