METHOD FOR PRODUCING A TURBINE ROTOR OF AN EXHAUST GAS TURBOCHARGER

A method for producing a turbine rotor of an exhaust gas turbocharger, wherein the turbine rotor includes a turbine wheel with a hub and turbine blades that extend from the hub, and a shaft, includes the steps of: providing the turbine wheel, composed of a first material, and a shaft composed of a s...

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Bibliographische Detailangaben
Hauptverfasser:	HENKER, OLIVER, STICH, ANTON
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	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 DIFFUSION TREATMENT OF METALLIC MATERIAL ENGINE PLANTS IN GENERAL 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 STEAM ENGINES SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION WEAPONS
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Beschreibung
Zusammenfassung:	A method for producing a turbine rotor of an exhaust gas turbocharger, wherein the turbine rotor includes a turbine wheel with a hub and turbine blades that extend from the hub, and a shaft, includes the steps of: providing the turbine wheel, composed of a first material, and a shaft composed of a second material that is different from the first material; connecting the shaft to the hub of the turbine wheel; and forming a protective layer by applying or introducing a halogen on or in the surface of the turbine wheel and subsequently heat-treating the turbine rotor, the heat treatment being carried out in an environment having an oxygen partial pressure which is greater than a first oxygen partial pressure from which the first material is oxidized and is less than a second oxygen partial pressure from which the second material is oxidized.