| 摘要 |
<p>In a process for coating the impeller blades of a rotating heat engine, the said blades are subjected in the operating state of the engine, i.e. "on line", to a first cleaning process, the appropriate agent for this, which depends on whether the blades are uncoated or coated, being mixed in the air stream to the compressor. After switching off the engine and opening it, the impeller blades are subjected in the stationary state, that is in the bladed state of the corresponding rotor or stator, to a preparation process for the following treatment stage. This preparation process may, for example, comprise, if required, dipping the blades into an oscillating erosive bath. The actual coating of the blades is performed by means of a high-speed flame spraying process, in which the protective layer is sprayed onto the surface of the base material at a particle speed of at least 300 m/s. After this, the blades are also subjected to a post-treatment, which if required serves to reduce the surface roughness and/or is provided for applying a top layer. <IMAGE></p> |
