Process for producing a cladding for a metallic component
AssigneeMTU Aero Engines AG
InventorGerhard Wydra
Life of this patent
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Abstract
The invention relates to a process for producing a cladding for a metallic component, such as for example a tip of a turbine blade, which cladding is provided on that surface of the component which is to be clad, the process being simple and inexpensive to carry out in terms of manufacturing technology and involving the following steps: producing a slip by mixing a powder, which contains at least one of the elements Ni, Cr or Ce, with a binder; applying the slip to the surface which is to be clad; adding ceramic particles before or after the slip is applied; drying the slip at a temperature of from room temperature to 300° C.; and alitizing the layer of slip.
Claims13
Process for producing a cladding for a metallic component, which is provided on the surface of this component, characterized by the following steps:
- producing a slip by mixing a powder, which contains at least one of the elements Ni or Cr or Ce, with a binder;
- applying the slip to the surface which is to be clad;
- adding hard ceramic particles to the slip before or after the slip is applied, the size of which particles is selected in such a way that they project above the layer following alitizing;
- drying the slip at a temperature of from room temperature to 300° C.;
- and alitizing the layer of slip.
Process according to one or more of the preceding claims, characterized in that particles of BN, SiC or Al2O3 are used.
Process according to one or more of the preceding claims, characterized in that the slip is produced from a powder of MCrAlY.
Process according to one or more of the preceding claims, characterized in that the powder is present with a grain size distribution of from 5 to 120 μm.
Process according to one or more of the preceding claims, characterized in that the application is carried out by spraying, brushing or dipping.
Process according to one or more of the preceding claims, characterized in that the drying is carried out over a period of 0.5-4 hours.
Process according to one or more of the preceding claims, characterized in that the layer of slip is heat-treated at a temperature of from 750 to 1 200° C. under argon or in vacuo prior to the alitizing.
Process according to one or more of the preceding claims, characterized in that the component consists of a nickel-base or cobalt-base alloy.
Process according to one or more of the preceding claims, characterized in that the component is a turbine blade, on the tip of which the cladding is provided.
Process according to one or more of the preceding claims, characterized in that the alitizing is carried out at a temperature of between 800 and 1 200° C. and for a period of from 1 to 12 hours.
Dependencies are inferred from the claim text.