TURBINE ROTOR AND MANUFACTURING METHOD OF TURBINE ROTOR

• Main Authors: NAKANO TAKASHI, KAWASAKI KENJI, MARUYAMA KIMMITSU, SHIGE TAKASHI, FUKUNAGA YOSHIAKI, NISHIMOTO SHIN
• Format: Patent
• Language: English; Korean
• Published: 01.07.2010
• Subjects: ALLOYS; BLASTING; CHEMISTRY; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; ENGINE PLANTS IN GENERAL; FERROUS OR NON-FERROUS ALLOYS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; LIGHTING; MACHINE TOOLS; MACHINES OR ENGINES IN GENERAL; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; MECHANICAL ENGINEERING; METAL-WORKING NOT OTHERWISE PROVIDED FOR; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES; PERFORMING OPERATIONS; SOLDERING OR UNSOLDERING; STEAM ENGINES; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WEAPONS; WELDING; WORKING BY LASER BEAM

A turbine rotor having proper strength and toughness and a process for production of the turbine rotor are provided without enhancing the production cost or prolonging the production time. A turbine rotor configured by welding a rotor-constituting member for high-temperature use which consists of a high Cr steel to a rotor-constituting member for low-temperature use which consists of a low Cr steel, wherein the rotor-constituting member for high-temperature use consists of a high Cr steel having a nitrogen content of 0.02 mass% or above, and the filler metal used in welding the rotor-constituting member for high -temperature use to the rotor-constituent member for low -temperature use is a 9%Cr type filler metal having a nitrogen content of 0.025 mass% or below.