Method for repairing a component by coating
AssigneeSiemens Aktiengesellschaft
InventorsJens Dahl Jensen, Jens Klingemann, Ursus Krüger, Daniel Körtvelyessy, Volkmar Lüthen, Ralph Reiche, Oliver Stier
Life of this patent
Estimating the term…
Abstract
A method for repairing a component such as a turbine blade is provided. At the end of its operating time, the component has, for example, a depletion of aluminium in a region near the surface. The application of a repair layer is provided including particles with an increased proportion of aluminium. A subsequent heat treatment may achieve the effect of equalizing the concentration of aluminium between the repair layer and the region near the surface, and so the aluminium content required for new components is achieved again.
Claims9
A process for repairing a component, a region of the component near the surface has damaged locations, comprising:
- applying a coating material to the component including the region in a form of a plurality of particles by cold spraying;
- and
- heating the component after the application of the coating,
- wherein the damaged location of the region near the surface contains a degradation of a microstructure whereby that at least a specific microstructural portion falls below a required concentration,
- wherein the coating material has a concentration of the specific microstructural portion which exceeds the required concentration, and
- wherein after the heating, the specific microstructural portion of the coating material diffuses into the component including the damaged locations with the result that the entire component includes the required concentration,
- wherein the specific microstructural portion is present in a first plurality of particles which are provided with a casing where the specific microstructural portion is aluminum or aluminum and chromium and the casing consists of a metal or a metal oxide,
- wherein the first plurality of particles is mixed with a second plurality of non-encased particles, and
- wherein the plurality of particles includes the mixture of the first plurality of particles and the second plurality of particles so that the mixture is applied to the coating and throughout the damaged locations,
- wherein the metal oxide is selected from the group consisting of:
- aluminum oxide, yttrium oxide, zirconium oxide and chromium oxide, and
- wherein the metal is selected from the group consisting of:
- cobalt, nickel or chromium, and a metal alloy of these metals.
Dependencies are inferred from the claim text.