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US 10,465,535 B2Granted
Compressor blade or vane having an erosion-resistant hard material coating
AssigneeSiemens Aktiengesellschaft
InventorsArturo Flores Renteria, Torsten Neddemeyer
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Abstract
A compressor blade for a gas turbine is provided. The compressor blade has a blade substrate that consists of a metal alloy and has an aluminum diffusion zone on a surface of the blade substrate. In addition, the compressor blade has a hard material coating provided on the surface of the blade substrate. A compressor that has a compressor blade and a method of producing such a compressor blade is also provided.
Claims5
A method for producing a compressor blade or vane, comprising the following steps:
- providing a blade or vane substrate comprising a metal alloy;
- coating the blade or vane substrate with a hard material coating;
- reducing a corrosion of the metal alloy as a result of spalling of the hard material coating by diffusing aluminum into a surface zone of the blade or vane substrate to produce an aluminum diffusion zone such that an aluminum proportion of 0.05 to 0.2% by weight is present in the surface zone, wherein, upon spalling of the hard material coating, the aluminum diffusion zone reacts to form aluminum oxide that protects the metal alloy against the corrosion;
- and
- wherein the hard material coating comprises at least one of TiN, TiAlN, AlTiN, and CrN as a single-layer ceramic or multi-layer ceramics;
- wherein the aluminum diffusion zone has a thickness of 10 to 24 micrometers.
3 more elements
Dependencies are inferred from the claim text.