Verfahren zum Reparieren eines gelöcherten Gasturbinenbauteils

A method is disclosed for repairing defects in a gas turbine component 10 that comprises a substrate 58 and an existing coating 44 on the substrate 58. The article 10 includes cooling holes 18 having a predetermined air flow requirement and an outer shaped portion 52 and an inner metering portion 60...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	DUCOTEY, HOWARD S. JR, ZUBER, ROBERT J, DRAGHI, PETER J
Format:	Patent
Sprache:	ger
Schlagworte:	AIR INTAKES FOR JET-PROPULSION PLANTS BLASTING CHEMICAL SURFACE TREATMENT CHEMISTRY CLADDING OR PLATING BY SOLDERING OR WELDING COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL COMBINED OPERATIONS COMBUSTION ENGINES CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING DIFFUSION TREATMENT OF METALLIC MATERIAL ENGINE PLANTS IN GENERAL GAS-TURBINE PLANTS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL LIGHTING MACHINE TOOLS MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING METAL-WORKING NOT OTHERWISE PROVIDED FOR METALLURGY NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES OTHER WORKING OF METAL PERFORMING OPERATIONS SOLDERING OR UNSOLDERING STEAM ENGINES SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TRANSPORTING UNIVERSAL MACHINE TOOLS WEAPONS WELDING WORKING BY LASER BEAM WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OFELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKESTHE PLACE OF A TOOL
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Beschreibung
Zusammenfassung:	A method is disclosed for repairing defects in a gas turbine component 10 that comprises a substrate 58 and an existing coating 44 on the substrate 58. The article 10 includes cooling holes 18 having a predetermined air flow requirement and an outer shaped portion 52 and an inner metering portion 60. The method comprises removing the existing coating 44 and recoating the surface of the article with a nonoriginal coating. After the nonoriginal coating is applied onto the component, the cooling holes 18 that meet a predetermined inspection criteria are reworked to remove the excess nonoriginal coating deposited in the outer shaped portion 52 of the cooling holes 18. The reworking is done by receiving an electrode 52, having only a shaped portion with a preselected shape, in the outer shaped portion 50 of the cooling holes 18 thus restoring the cooling holes to the predetermined air flow requirement.