Method for coating a component with film cooling holes and component

摘要

The method comprises applying a mask before coating, in a film cooling hole (4) of a substrate, where the film cooling hole has a diffuser (10) and is equipped with an opening and an end in a flow direction (13). Masking material (22) does not present in the diffuser at end and is present in remaining area of the film cooling hole. The diffuser present in the flow direction has an extension (a+b), whose ratio is 2:1. The masking materials are present only in the area with a length from the end to the diffuser. The masking extends itself over 60% of the length in the diffuser. The method comprises applying a mask before coating, in a film cooling hole (4) of a substrate, where the film cooling hole has a diffuser (10) and is equipped with an opening and an end in a flow direction (13). Masking material (22) does not present in the diffuser at end and is present in remaining area of the film cooling hole. The diffuser present in the flow direction has an extension (a+b), whose ratio is 2:1. The masking materials are present only in the area with a length from the end to the diffuser. The masking extends itself over 60% of the length in the diffuser. The masking material is arranged to larger part in cylindrical part of the film cooling hole. A polymer with inorganic filling material is used as masking materials. No masking is applied on the end of the film cooling hole. The masking material is subjected in the film cooling hole at the end of the diffuser. The masking material protrudes over the external surface of the component or over an already available coating on the substrate only in an internal portion of the film cooling hole. An independent claim is included for a component produced by coating a substrate with a film cooling holes by a mask.