SUPERALLOY TURBOMACHINE PART WITH AN OPTIMIZED HAFNIUM CONTENT

The invention relates to a turbomachine part (20) having a nickel-based superalloy (21) comprising 5.0 to 8.0 wt.% of cobalt, 6.5 to 10 wt.% of chromium, 0.5 to 2.5 wt.% of molybdenum, 5.0 to 9.0 wt.% of tungsten, 6.0 to 9.0 wt.% of tantalum, 4.5 to 5.8 wt.% of aluminum, hafnium with a weight conten...

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Bibliographische Detailangaben
Hauptverfasser:	DELAUTRE, Joel, PASQUET, Annie, HAMADI, Sarah, AUDIC, Christophe, JAQUET, Virginie, PEDRAZA DIAZ, Fernando
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUSPOLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE ALLOYS APPARATUS THEREFOR BLASTING CHEMICAL SURFACE TREATMENT CHEMISTRY 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 CRYSTAL GROWTH DIFFUSION TREATMENT OF METALLIC MATERIAL ENGINE PLANTS IN GENERAL FERROUS OR NON-FERROUS ALLOYS HEATING INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING METALLURGY NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE REFINING BY ZONE-MELTING OF MATERIAL SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE SINGLE-CRYSTAL-GROWTH STEAM ENGINES SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TREATMENT OF ALLOYS OR NON-FERROUS METALS UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL ORUNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL WEAPONS
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Beschreibung
Zusammenfassung:	The invention relates to a turbomachine part (20) having a nickel-based superalloy (21) comprising 5.0 to 8.0 wt.% of cobalt, 6.5 to 10 wt.% of chromium, 0.5 to 2.5 wt.% of molybdenum, 5.0 to 9.0 wt.% of tungsten, 6.0 to 9.0 wt.% of tantalum, 4.5 to 5.8 wt.% of aluminum, hafnium with a weight content of between 500 ppm and 1100 ppm, and optionally comprising niobium with a weight content of 1.5% or less, and optionally at least one of carbon, zirconium and boron, each in a weight content of less than or equal to 100 ppm, the remainder being composed of nickel and unavoidable impurities. L'invention concerne une pièce de turbomachine (20) comprenant un superalliage base nickel (21) comprenant en teneur massique 5,0 % à 8,0 % de cobalt, 6,5 % à 10 % de chrome, 0,5 % à 2,5 % de molybdène, 5,0 % à 9,0 % de tungstène, 6,0 % à 9,0 % de tantale, 4,5 % à 5,8 % d'aluminium, de l'hafnium en une teneur massique comprise entre 500 ppm et 1100 ppm, et comprenant éventuellement du niobium en une teneur massique inférieure ou égale à 1,5 %, et éventuellement l'un au moins du carbone, du zirconium et du bore chacun en une teneur massique inférieure ou égale à 100 ppm, le complément étant composé par du nickel et des impuretés inévitables.