WO2008122563A3 - Enhanced erosion resistance for low pressure steam turbine blades - Google Patents

Enhanced erosion resistance for low pressure steam turbine blades Download PDF

Info

Publication number
WO2008122563A3
WO2008122563A3 PCT/EP2008/053981 EP2008053981W WO2008122563A3 WO 2008122563 A3 WO2008122563 A3 WO 2008122563A3 EP 2008053981 W EP2008053981 W EP 2008053981W WO 2008122563 A3 WO2008122563 A3 WO 2008122563A3
Authority
WO
WIPO (PCT)
Prior art keywords
erosion resistance
low pressure
leading edge
edge region
steam turbine
Prior art date
Application number
PCT/EP2008/053981
Other languages
French (fr)
Other versions
WO2008122563A2 (en
Inventor
Stuart Richard Holdsworth
Original Assignee
Alstom Technology Ltd
Stuart Richard Holdsworth
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alstom Technology Ltd, Stuart Richard Holdsworth filed Critical Alstom Technology Ltd
Publication of WO2008122563A2 publication Critical patent/WO2008122563A2/en
Publication of WO2008122563A3 publication Critical patent/WO2008122563A3/en

Links

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
    • F01D5/12—Blades
    • F01D5/28—Selecting particular materials; Particular measures relating thereto; Measures against erosion or corrosion
    • F01D5/286—Particular treatment of blades, e.g. to increase durability or resistance against corrosion or erosion
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D10/00—Modifying the physical properties by methods other than heat treatment or deformation
    • C21D10/005—Modifying the physical properties by methods other than heat treatment or deformation by laser shock processing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/08—Devices involving relative movement between laser beam and workpiece
    • B23K26/0869—Devices involving movement of the laser head in at least one axial direction
    • B23K26/0876—Devices involving movement of the laser head in at least one axial direction in at least two axial directions
    • B23K26/0884—Devices involving movement of the laser head in at least one axial direction in at least two axial directions in at least in three axial directions, e.g. manipulators, robots
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/02—Hardening by precipitation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/006—Vehicles
    • 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
    • F05D2220/00—Application
    • F05D2220/30—Application in turbines
    • F05D2220/31—Application in turbines in steam turbines

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Optics & Photonics (AREA)
  • Materials Engineering (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Robotics (AREA)
  • Plasma & Fusion (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat Treatment Of Articles (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Abstract

The erosion resistance of a leading edge region 2 of a low pressure turbine blade 1 made from a precipitation hardening stainless steel is enhanced by applying a resolution treatment to the leading edge region, ageing the blade such that the material in the leading edge region has a higher erosion resistance than the remainder of the component, and laser-peening the leading edge region 2 sufficiently to generate a deep surface layer in which the stresses are highly compressive.
PCT/EP2008/053981 2007-04-04 2008-04-03 Enhanced erosion resistance for low pressure steam turbine blades WO2008122563A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0706696.2 2007-04-04
GB0706696A GB2448109A (en) 2007-04-04 2007-04-04 Enhanced erosion resistance for low pressure steam turbine bl ades

Publications (2)

Publication Number Publication Date
WO2008122563A2 WO2008122563A2 (en) 2008-10-16
WO2008122563A3 true WO2008122563A3 (en) 2008-12-18

Family

ID=38090941

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/053981 WO2008122563A2 (en) 2007-04-04 2008-04-03 Enhanced erosion resistance for low pressure steam turbine blades

Country Status (2)

Country Link
GB (1) GB2448109A (en)
WO (1) WO2008122563A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9291062B2 (en) 2012-09-07 2016-03-22 General Electric Company Methods of forming blades and method for rendering a blade resistant to erosion
CN110732779B (en) * 2019-10-18 2021-05-04 扬州镭奔激光科技有限公司 Fixed-axis rotation laser shot blasting method for blisk stable constraint layer

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5591009A (en) * 1995-01-17 1997-01-07 General Electric Company Laser shock peened gas turbine engine fan blade edges
GB2424422A (en) * 2005-03-23 2006-09-27 Alstom Technology Ltd Precipitation hardening of a steel

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2397307A (en) * 2003-01-20 2004-07-21 Rolls Royce Plc Abradable Coatings
US20050158460A1 (en) * 2004-01-21 2005-07-21 Williams Christopher C. Method for protecting new/used engine parts
JP2005265449A (en) * 2004-03-16 2005-09-29 Toshiba Corp Preventive maintenance method of structure
JP2006061966A (en) * 2004-08-30 2006-03-09 Japan Atom Energy Res Inst METHOD FOR PREVENTING STRESS CORROSION CRACKING CAUSED BY COLD WORKING IN ALLOY STEEL IRON INCLUDING STEEL IRON AND STAINLESS STEEL USING fs (FEMTOSECOND) REGION EXTRASHORT PULSE kW CLASS HIGH AVERAGE OUTPUT LASER

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5591009A (en) * 1995-01-17 1997-01-07 General Electric Company Laser shock peened gas turbine engine fan blade edges
GB2424422A (en) * 2005-03-23 2006-09-27 Alstom Technology Ltd Precipitation hardening of a steel

Also Published As

Publication number Publication date
GB2448109A (en) 2008-10-08
WO2008122563A2 (en) 2008-10-16
GB0706696D0 (en) 2007-05-16

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