ROTOR FOR TURBINE, PROCESS FOR PRODUCING SAME, METHOD FOR JOINING NI-BASED SUPERALLOY MATERIAL TO STEEL MATERIAL, AND STRUCTURE

PROBLEM TO BE SOLVED: To provide a rotor for a turbine having Ni-based superalloy part and a steel part and a process for producing the same, wherein a joining part between the Ni-based superalloy and the steel part has sufficient mechanical properties as the rotor for the turbine, and to provide a...

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Bibliographische Detailangaben
Hauptverfasser:	HEIKO TAKEHIRO, MATSUOKA SUKENORI, KOGA SHINJI, TAKEDA YUSUKE, OKAUCHI HIRONORI
Format:	Patent
Sprache:	eng
Schlagworte:	AIR INTAKES FOR JET-PROPULSION PLANTS BLASTING CLADDING OR PLATING BY SOLDERING OR WELDING COMBUSTION ENGINES CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING ENGINE PLANTS IN GENERAL GAS-TURBINE PLANTS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING MACHINE TOOLS MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING METAL-WORKING NOT OTHERWISE PROVIDED FOR NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES PERFORMING OPERATIONS SOLDERING OR UNSOLDERING STEAM ENGINES TRANSPORTING WEAPONS WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a rotor for a turbine having Ni-based superalloy part and a steel part and a process for producing the same, wherein a joining part between the Ni-based superalloy and the steel part has sufficient mechanical properties as the rotor for the turbine, and to provide a method for joining the Ni-based superalloy material to steel material and a structure, suitable for the rotor for the turbine.SOLUTION: A process for producing a rotor for a turbine comprises: a step in which a first rotor disk, which is constituted of a precipitation hardening type Ni-based superalloy, is joined to an intermediate material constituted of a solid-solution strengthening type Ni-based superalloy, by electron beam welding; a step in which the joined object is subjected to age hardening at a first temperature, which is suitable for age-hardening the precipitation hardening type Ni-based superalloy; a step in which the intermediate material is joined to a second rotor disk which is constituted of a steel, by electron beam welding; and a step in which the resultant joined object is annealed at a second temperature, which is suitable for annealing the steel.