| Abstract: |
Since high-temperature repair brazing in a vacuum, in addition to welding, is becoming increasingly important in the manufacture and repair of complex components, it is necessary to further develop brazing processes with a view to further minimizing production costs and increasing product quality with the focus on resource-saving production. Usually, high-temperature filler metals are produced in the form of pastes, tapes, melt-spun foils and powders. In order to braze components, the (repair) filler metal is applied manually to the parts of the component to be repaired using a dosing needle, brush or spatula. Due to the powder metallurgical production of filler metals, there is still the possibility of applying them by thermal spraying. The advantage of applying filler metals by thermal spraying is that large areas of the parts to be joined or repaired can be coated in a near net shape manner. This contribution deals with thermally sprayed nickel and titanium based filler metals. Typical areas of application are therefore mechanical and plant engineering, automotive engineering, biomedical engineering and aerospace. This work shows how repair brazing can be used by thermal spraying of turbine blades in an aircraft engine (complex capital good). The technology presented here has technical and economic advantages and enables the process chain for repairing turbine blades, which corresponds to the current state of the art, to be shortened.
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