Method for vapor-coating turbine buckets
AssigneeLeybold-Heraeus GmbH
InventorsHans Aichert, Walter Dietrich, Otto-Horst Hoffmann, Friedrich Stark, Herbert Stephan
Life of this patent
Estimating the term…
Abstract
Method for vacuum depositing corrosion and oxidation resistant alloy coatings on turbine buckets having leading edges and trailing edges, with simultaneous rotation of the turbine buckets about their longitudinal axis in a vapor stream above a vapor source. The time of stay of each element of the surface above the vapor source is varied during a 360.degree. rotation such that it is shortest when the leading edges and the trailing edges are pointed towards the vapor source and longest when the concave and convex flanks are presented to it.
Claims5
Method for vacuum depositing corrosion-and oxidation-resistant alloy coatings on all sides of curved turbine buckets having leading edges and trailing edges, with simultaneous rotation of the turbine buckets about their longitudinal axes in the vapor stream above a vapor source which comprises non-uniformly rotating the turbine buckets with respect to speed of rotation to vary the time of stay of each element of the surface above the vapor source during a 360.degree. rotation such that it is shortest when the leading edges and trailing edges are pointing towards the vapor source and longest when the concave and convex flanks are presented to it.
Dependencies are inferred from the claim text.