US20100202891A1 - Low-pressure turbine rotor - Google Patents

Low-pressure turbine rotor Download PDF

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Publication number
US20100202891A1
US20100202891A1 US12/674,022 US67402209A US2010202891A1 US 20100202891 A1 US20100202891 A1 US 20100202891A1 US 67402209 A US67402209 A US 67402209A US 2010202891 A1 US2010202891 A1 US 2010202891A1
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United States
Prior art keywords
pressure turbine
steam
low
steel
less
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Abandoned
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US12/674,022
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English (en)
Inventor
Shin Nishimoto
Yoshinori Tanaka
Ryuichi Yamamoto
Kenji Kawasaki
Takashi Shige
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Mitsubishi Heavy Industries Ltd
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Mitsubishi Heavy Industries Ltd
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Assigned to MITSUBISHI HEAVY INDUSTRIES, LTD. reassignment MITSUBISHI HEAVY INDUSTRIES, LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KAWASAKI, KENJI, NISHIMOTO, SHIN, SHIGE, TAKASHI, TANAKA, YOSHINORI, YAMAMOTO, RYUICHI
Publication of US20100202891A1 publication Critical patent/US20100202891A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/02—Blade-carrying members, e.g. rotors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/02—Blade-carrying members, e.g. rotors
    • F01D5/06—Rotors for more than one axial stage, e.g. of drum or multiple disc type; Details thereof, e.g. shafts, shaft connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D1/00—Non-positive-displacement machines or engines, e.g. steam turbines
    • F01D1/02—Non-positive-displacement machines or engines, e.g. steam turbines with stationary working-fluid guiding means and bladed or like rotor, e.g. multi-bladed impulse steam turbines
    • F01D1/04—Non-positive-displacement machines or engines, e.g. steam turbines with stationary working-fluid guiding means and bladed or like rotor, e.g. multi-bladed impulse steam turbines traversed by the working-fluid substantially axially
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D3/00—Machines or engines with axial-thrust balancing effected by working-fluid
    • F01D3/02—Machines or engines with axial-thrust balancing effected by working-fluid characterised by having one fluid flow in one axial direction and another fluid flow in the opposite direction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/02—Blade-carrying members, e.g. rotors
    • F01D5/06—Rotors for more than one axial stage, e.g. of drum or multiple disc type; Details thereof, e.g. shafts, shaft connections
    • F01D5/063—Welded rotors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/10—Metals, alloys or intermetallic compounds
    • F05D2300/13—Refractory metals, i.e. Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, W
    • F05D2300/132—Chromium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/10—Metals, alloys or intermetallic compounds
    • F05D2300/17—Alloys
    • F05D2300/177—Ni - Si alloys

Definitions

  • the present invention relates to a low-pressure turbine rotor used in a steam turbine facility including a high-pressure turbine, an intermediate-pressure turbine, and a low-pressure turbine, and particularly, to a low-pressure turbine rotor suitably used in a steam turbine facility in which the steam inlet temperature attains a high-temperature of 380° C. or higher.
  • thermal power generation is safe and its utility value is high as a power generation method with a high capacity to respond to load change, it is expected that thermal power generation will also continue to play an important role in the power generation field in the future.
  • a steam turbine facility used for coal-fired thermal power generation including a steam turbine generally has a high-pressure turbine, an intermediate-pressure turbine, and a low-pressure turbine, and steam in the range of 600° C. is used for the steam turbine facility.
  • steam in the 600° C. range supplied from a boiler is introduced into the high-pressure turbine in a high-pressure blade stage composed of blades and a vanes to rotate the high-pressure turbine to perform expansion work.
  • the steam is exhausted from the high-pressure turbine and is introduced into the intermediate-pressure turbine to rotate the intermediate-pressure turbine to perform expansion work, similarly to the high-pressure turbine.
  • the steam is introduced into the low-pressure turbine to perform expansion work and is exhausted and condensed to a condenser.
  • the low-pressure turbine rotor in such a steam turbine facility is formed from 3.5Ni steel (for example, 3.5NiCrMoV steel, etc.), and the inlet steam temperature of the low-pressure turbine was set to 380° C. or lower that is a temperature such that 3.5Ni steel is able to maintain mechanical strength characteristics and toughness.
  • second-stage reheating pressure becomes low.
  • the inlet steam temperature of the low pressure turbine of the double-stage reheating rises higher than single-stage reheating, and design conditions become strict.
  • Patent Document 1 disclosed a low-pressure turbine rotor capable of reducing the content of impurities contained in 3.5Ni steel which constitutes the low-pressure turbine rotor, and limiting the content to a minute amount, thereby suppressing changes in the structure of the metal which induces embrittlement over time, such as grain boundary segregation of impurity elements caused by heating, and stably performing operations even if steam of 380° C. or higher is introduced.
  • Patent Document 1 Japanese Patent Application Laid-Open No. 2006-170006
  • the invention was made in view of the problems of the conventional technique, and the object thereof is to provide a low-pressure turbine rotor capable of maintaining mechanical strength characteristics, and without problems in terms of quality without increasing manufacturing costs and manufacturing days, even if high temperature steam is introduced into the low-pressure turbine.
  • the present invention provides a low-pressure turbine rotor used in a steam turbine facility including a high-pressure turbine, an intermediate-pressure turbine, and a low-pressure turbine.
  • the turbine rotor includes a member formed from 1CrMoV steel (hereinafter referred to as 1Cr steel), 2.25CrMoV steel (hereinafter referred to as 2.25Cr steel), or 10CrMoV steel (hereinafter referred to as 10Cr steel) arranged on a steam inlet side, and a member formed from 3.5Ni steel arranged on a steam outlet side, which are joined together by welding.
  • 1Cr steel, 2.25Cr steel, and 10Cr steel are materials which have conventionally been used for high-pressure turbine rotors or intermediate-pressure turbine rotors, the material management methods are established, and also easily available. Moreover, the above materials have a more excellent high-temperature resistance than 3.5Ni steel.
  • 3.5Ni steel has stress corrosion cracking (SCC) susceptibility lower than 1Cr steel and 2.25Cr steel. Additionally, 10Cr steel is more expensive than 3.5Ni steel.
  • steam inlet side into which high-temperature steam is introduced includes a member formed from 1Cr steel, 2.25Cr steel, or 10Cr steel
  • steam outlet side in which a flow passage (blade length) increases and higher strength is required includes a member formed from 3.5Ni steel, whereby it is possible to form a low-pressure turbine rotor which is excellent against high-temperature and stress corrosion cracking, and even if high-temperature steam is introduced, it is possible to maintain its mechanical strength characteristics and toughness.
  • the embrittlement susceptibility of the whole low-pressure turbine rotor is almost the same as the conventional low-pressure turbine rotor the entirety of which is made of 3.5Ni steel.
  • the embrittlement susceptibility of the whole low-pressure turbine rotor is superior to the conventional low-pressure turbine rotor the entirety of which is made of 3.5Ni steel. Therefore, the member on the steel inlet side is more preferably formed from 2.25Cr steel or 10Cr steel.
  • a low-pressure turbine rotor used in a steam turbine facility including a high-pressure turbine, an intermediate-pressure turbine, and a low-pressure turbine.
  • the turbine rotor includes a member arranged on a steam inlet side and a member arranged on a steam outlet side, which are joined together by welding, both the members are formed from 3.5Ni steel, and the member arranged on the steam inlet side is formed from low-impurity 3.5Ni steel.
  • the low-impurity 3.5Ni steel arranged on the steam inlet side contains, by weight %, Si: 0.1% or less, Mn: 0.1% or less, and inevitable impurities, by weight %, containing P: 0.02% or less, S: 0.02% or less, Sn: 0.02% or less, As: 0.02% or less, Sb: 0.02% or less, Al: 0.02% or less, and Cu: 0.1% or less.
  • the member made of 3.5Ni steel the impurity content of which is reduced and limited to a minute amount for the steam inlet side into which high-temperature steam is introduced, it is possible to suppress changes in the metal structure which induce embrittlement over time, such as grain boundary segregation of impurity elements caused by heating, and even if steam of 380° C. or higher is introduced, it is possible to stably perform operation.
  • the low-pressure turbine rotor is used in a steam turbine facility where the inlet steam temperature of the low-pressure turbine is 380° C. or higher,
  • a region where the temperature of the steam passing through the low-pressure turbine becomes 380° C. or higher includes the member arranged on the steam inlet side, and a region where the temperature of the steam passing through the low-pressure turbine is less than 380° C. includes the member arranged on the steam outlet side.
  • the normal 3.5Ni steel has a high possibility of inducing embrittlement over time, such as grain boundary segregation of impurity elements, if steam temperature becomes 380° C. or higher.
  • a region where steam temperature becomes 380° C. or higher includes the member arranged on the steam inlet side, and a region where steam temperature is less than 380° C. includes the member arranged on the steam outlet side, whereby the normal 3.5Ni steel does not contact steam of 380° C. or higher, and it is possible to suppress embrittlement of a member formed from the 3.5Ni steel arranged on the steam outlet side.
  • the low-pressure turbine rotor is used in a steam turbine facility where the inlet steam temperature of at least one of the high-pressure turbine and the intermediate-pressure turbine is 630° C. or higher.
  • the high-pressure turbine and the intermediate-pressure turbine are not enlarged, it is possible to reduce emissions of CO 2 from the steam turbine facility, and it is possible to improve the thermal efficiency of the steam turbine facility.
  • FIG. 1 is a view illustrating the configuration of a steam turbine power generation facility in Embodiment 1.
  • FIG. 2 is a plan view schematically illustrating the configuration of a low-pressure turbine rotor in Embodiment 1.
  • FIG. 3 is a plan view schematically illustrating the configuration of a low-pressure turbine rotor in Embodiment 2.
  • FIG. 4 is a graph illustrating the embrittlement factors of 1Cr steel, 2.25Cr steel, 10Cr steel, and 3.5Ni steel.
  • FIG. 1 is a view illustrating the configuration of a steam turbine power generation facility in Embodiment 1.
  • FIG. 1 a power generation facility composed of a steam turbine facility using a low-pressure turbine rotor of the invention will be described.
  • FIG. 1 is an example of single-stage reheating, and the invention is also applied to implementation of double-stage reheating and a high temperature rise (630° C. or higher) only by reheating, and is not particularly limited.
  • the steam turbine power generation facility 10 illustrated in FIG. 1 mainly includes a high-pressure turbine 14 , an intermediate-pressure turbine 12 , a low-pressure turbine 16 , a power generator 18 , a condenser 20 , and a boiler 24 .
  • the steam passes through in order of a boiler 24 , a main steam pipe 26 , the high-pressure turbine 14 , a low-temperature reheat pipe 28 , the boiler 24 , the high-temperature reheat pipe 30 , the intermediate-pressure turbine 12 , a crossover pipe 32 , the low-pressure turbine 16 , the condenser 20 , a water feed pump 22 , and the boiler 24 .
  • the steam overheated to 630° C. or higher in the boiler 24 is introduced into the high-pressure turbine 14 through the main steam pipe 26 .
  • the steam introduced into the high-pressure turbine 14 is exhausted and is returned to the boiler 24 through the low-temperature reheat pipe 28 after having performed expansion work.
  • the steam returned to the boiler 24 is reheated in the boiler 24 and turned into steam of 630° C. or higher, and is sent to the intermediate-pressure turbine 12 through the high-temperature reheat pipe 30 .
  • the steam introduced into the intermediate-pressure turbine 12 is exhausted, is turned into steam of about 400 to 430° C., and is sent to the low-pressure turbine 16 through the crossover pipe 32 after having performed expansion work.
  • the steam introduced into the low-pressure turbine 16 is exhausted and is sent to the condenser 20 after having performed expansion work.
  • the steam sent to the condenser 20 is condensed in the condenser 20 , is increased in pressure in the water feed pump 22 , and is returned to the boiler 24 .
  • the power generator 18 is rotationally driven by the expansion work of each turbine to generate power.
  • FIG. 2 is a plan view schematically illustrating the configuration of the rotor used for the low-pressure turbine 16 in Embodiment 1.
  • the low-pressure turbine rotor used for the steam turbine power generation facility as mentioned above will be described with reference to FIG. 2 .
  • the low-pressure turbine rotor 16 A includes one member (hereinafter referred to as chrome steel portion) 16 a made of 1Cr steel, 2.25Cr steel, or 10Cr steel, and two members (hereinafter referred to as normal 3.5Ni steel portions) 16 b and 16 c made of 3.5Ni steel.
  • the chrome steel portion 16 a is joined to the normal 3.5Ni steel portions 16 b and 16 c , respectively, by welding at both ends thereof, thereby forming the low-pressure turbine rotor 16 A integrated in order of the normal 3.5Ni steel portion 16 b , the chrome steel portion 16 a , and the normal 3.5Ni steel portion 16 c from one end.
  • chrome steel portion 16 a is arranged at a position exposed to steam of 380° C. or higher, and the normal 3.5Ni steel portions 16 b and 16 c are arranged at positions exposed to steam of less than 380° C.
  • the chrome steel portion is formed from 1Cr steel, 2.25Cr, or 10Cr steel which has excellent in high-temperature resistance, and is easily available.
  • the 1Cr steel may include, for example, a material having composition containing, by weight %, C: 0.2 to 0.4%, Si: 0.35% or less, Mn: 1.5% or less, Ni: 2.0% or less, Cr: 0.5 to 1.5%, Mo: 0.5 to 1.5%, V: 0.2 to 0.3%, and the balance: Fe with inevitable impurities.
  • the 2.25Cr Steel may include, for example, a material having composition containing, by weight %, C: 0.2 to 0.35%, Si: 0.35% or less, Mn: 1.5% or less, Ni: 0.2 to 2.0%, Cr: 1.5 to 3.0%, Mo: 0.9 to 1.5%, V: 0.2 to 0.3%, and the balance: Fe with inevitable impurities.
  • the 10Cr steel may include, for example, a material having composition containing, by weight %, C: 0.05 to 0.4%, Si: 0.35% or less, Mn: 2.0% or less, Ni: 3.0% or less, Cr: 7 to 13%, Mo: 0.1 to 3.0%, V: 0.01 to 0.5%, N: 0.01 to 0.1%, Nb: 0.01 to 0.2%, and the balance: Fe with inevitable impurities.
  • the 10Cr steel of another example may include, for example, a material having composition containing, by weight %, C: 0.05 to 0.4%, Si: 0.35% or less, Mn: 2.0% or less, Ni: 7.0% or less, Cr: 8 to 15%, Mo: 0.1 to 3.0%, V: 0.01 to 0.5%, N: 0.01 to 0.1%, Nb: 0.2% or less, and the balance: Fe with inevitable impurities.
  • FIG. 4 is a graph illustrating the embrittlement factor of 1Cr steel, 2.25Cr steel, 10Cr steel, and 3.5Ni steel.
  • the ordinate axis represents embrittlement factors ( ⁇ FATT), and values used as the index of the easiness of embrittlement. As the numeric value of this factor is higher, susceptibility to embrittlement is higher and embrittlement is easier.
  • the abscissa axis represents J-Factors and values used as the index of the concentration of impurities. As is clear from FIG. 4 , materials easily embrittle as the impurity concentration increases. Moreover, 1Cr steel and 3.5Ni steel have almost the same embrittlement factors, the embrittlement factor of 2.25Cr steel is lower than that, and the embrittlement factor of 10Cr steel is lower still.
  • the chrome steel portion 16 a is more preferably formed from 2.25Cr steel or 10Cr steel.
  • the 3.5Ni steel may include, for example, a material having composition containing, by weight %, C: 0.4% or less, Si: 0.35% or less, Mn: 1.0% or less, Cr: 1.0 to 2.5%, V: 0.01 to 0.3%, Mo: 0.1 to 1.5%, Ni: 3.0 to 4.5%, and the balance: Fe with inevitable impurities.
  • Joining is made by welded portions between the chrome steel portion 16 a and the normal 3.5Ni steel portions 16 b and 16 c by welding.
  • the method of the welding is not particularly limited if the welded portions are able to withstand the operational conditions of the low-pressure turbine, it is possible to include a general welding method of supplying a weld wire to an arc generated by a welding torch as an example as a filler.
  • a narrow groove welding joint, etc. is adopted as the shape of the welded portions.
  • a filler supplied as a weld wire by melting caused by an arc is laminated for every single pass, and the filler is filled into the narrow groove welding joint, thereby joining together the chrome steel portion 16 a and the normal 3.5N1 steel portions 16 b and 16 c .
  • the 3.5Ni steel that is the same material as the normal 3.5Ni steel portion is used as the filler.
  • 1Cr steel, 2.25Cr steel, and 10Cr steel are materials which have conventionally been used for high-pressure turbine rotors or intermediate-pressure turbine rotors, the materials management methods are established, and also easily available. Moreover, the above materials have more excellent high-temperature resistance than 3.5Ni steel. Additionally, 3.5Ni steel has stress corrosion cracking (SCC) susceptibility lower than 1Cr steel, 2.25Cr steel, and 10Cr steel.
  • SCC stress corrosion cracking
  • steam inlet side into which high-temperature steam is introduced includes a member formed from 1Cr steel, 2.25Cr steel, or 10Cr steel
  • steam outlet side in which a flow passage diameter (blade diameter) increases and higher strength is required includes a member formed from 3.5Ni steel, whereby it is possible to form a low-pressure turbine rotor which is excellent against high-temperature and stress corrosion cracking, and even if high-temperature steam is introduced, it is possible to maintain its mechanical strength characteristics.
  • the normal 3.5Ni steel has a high possibility of inducing embrittlement over time, such as grain boundary segregation of impurity elements, if the steam temperature becomes 380° C. or higher.
  • a region where the steam temperature becomes 380° C. or higher includes a member arranged on the steam inlet side, and a region where steam temperature is less than 380° C. includes a member arranged on the steam outlet side, whereby the normal 3.5Ni steel does not contact the steam of 380° C. or higher, and it is possible to suppress embrittlement of a member formed from the 3.5Ni steel arranged on the steam outlet side.
  • Embodiment 2 a low-pressure turbine rotor 16 B of another form will be described.
  • the low-pressure turbine rotor 16 B includes one member (referred to as a low-impurity 3.5Ni steel portion) 16 d made of low-impurity 3.5Ni steel with little impurity content, and the normal 3.5Ni steel portions 16 b and 16 c.
  • Embodiment 2 is a form in which the low-impurity 3.5Ni steel portion 16 d is adopted instead of the chrome steel portion 16 a of the low-pressure turbine rotor with the form of Embodiment 1 illustrated in FIG. 2 .
  • the description thereof is omitted.
  • the low-impurity 3.5Ni steel portion 16 d is arranged at a position exposed to steam of 380° C. or higher, and the normal 3.5Ni steel portions 16 b and 16 c are arranged at positions exposed to steam of less than 380° C.
  • the low-impurity 3.5Ni steel portion 16 d is formed from a 3.5Ni steel portion with little impurity content.
  • the low-impurity 3.5Ni steel portion 16 d may include, for example, a material having composition containing, by weight %, C: 0.4% or less, Si: 0.1% or less, Mn: 0.1% or less, Cr: 1.0 to 2.5%, V: 0.01 to 0.3%, Mo: 0.1 to 1.5%, Ni: 3.0 to 4.5%, and the balance: Fe with inevitable impurities, and the inevitable impurities contain, by weight %, P: 0.02% or less, S: 0.02% or less, Sn: 0.02% or less, As: 0.02% or less, Sb: 0.02% or less, Al: 0.02% or less, and Cu: 0.1% or less.
  • Joining is made by welded portions between the low-impurity 3.5Ni steel portion 16 d and the normal 3.5Ni steel portions 16 b and 16 c by welding.
  • the member 16 d made of low-impurity 3.5Ni steel the impurity content of which is reduced and limited to a minute amount for the steam inlet side into which high-temperature steam is introduced, it is possible to suppress changes in metal structure which induces embrittlement over time, such as grain boundary segregation of impurity elements caused by heating, and even if the steam of 380° C. or higher is introduced, it is possible to stably perform operation.
  • the normal 3.5Ni steel has a high possibility of inducing embrittlement over time, such as grain boundary segregation of impurity elements, if steam temperature becomes 380° C. or higher.
  • a region where steam temperature becomes 380° C. or higher includes the member arranged on the steam inlet side, and a region where steam temperature is less than 380° C. includes the member arranged on the steam outlet side, whereby the normal 3.5Ni steel does not contact the steam of 380° C. or higher, and it is possible to suppress embrittlement of a member formed from the 3.5Ni steel arranged on the steam outlet side.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
US12/674,022 2008-08-11 2009-07-30 Low-pressure turbine rotor Abandoned US20100202891A1 (en)

Applications Claiming Priority (3)

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JP2008-207421 2008-08-11
JP2008207421 2008-08-11
PCT/JP2009/063896 WO2010018773A1 (fr) 2008-08-11 2009-07-30 Rotor pour turbine basse pression

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US (1) US20100202891A1 (fr)
EP (1) EP2312127A4 (fr)
JP (1) JP4995317B2 (fr)
KR (2) KR20100033421A (fr)
CN (1) CN101772622A (fr)
WO (1) WO2010018773A1 (fr)

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US20130323075A1 (en) * 2012-06-04 2013-12-05 General Electric Company Nickel-chromium-molybdenum-vanadium alloy and turbine component
US20150125280A1 (en) * 2011-03-30 2015-05-07 Mitsubishi Heavy Industries, Ltd. Rotor of rotary machine and rotary machine
US11066933B2 (en) 2016-07-14 2021-07-20 Siemens Energy Global GmbH & Co. KG Rotor shaft and method for producing a rotor shaft

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US9657574B2 (en) * 2011-03-30 2017-05-23 Mitsubishi Heavy Industries, Ltd. Rotor of rotary machine and rotary machine
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KR20130051014A (ko) 2013-05-16
WO2010018773A1 (fr) 2010-02-18
CN101772622A (zh) 2010-07-07
JP4995317B2 (ja) 2012-08-08
EP2312127A4 (fr) 2015-01-07
EP2312127A1 (fr) 2011-04-20
KR20100033421A (ko) 2010-03-29

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