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DE60305009D1 - Verfahren zur beseitigung von gussfehlern - Google Patents

Verfahren zur beseitigung von gussfehlern

Info

Publication number
DE60305009D1
DE60305009D1 DE60305009T DE60305009T DE60305009D1 DE 60305009 D1 DE60305009 D1 DE 60305009D1 DE 60305009 T DE60305009 T DE 60305009T DE 60305009 T DE60305009 T DE 60305009T DE 60305009 D1 DE60305009 D1 DE 60305009D1
Authority
DE
Germany
Prior art keywords
molding errors
removing molding
errors
molding
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
DE60305009T
Other languages
English (en)
Other versions
DE60305009T2 (de
Inventor
John Fernihough
Matthias Hoebel
Maxim Konter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GE Vernova GmbH
Original Assignee
Alstom Technology AG
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 AG filed Critical Alstom Technology AG
Publication of DE60305009D1 publication Critical patent/DE60305009D1/de
Application granted granted Critical
Publication of DE60305009T2 publication Critical patent/DE60305009T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01DNON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/005Repairing methods or devices
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00Casting in, on, or around objects which form part of the product
    • B22D19/10Repairing defective or damaged objects by metal casting procedures
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D27/00Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
    • B22D27/04Influencing the temperature of the metal, e.g. by heating or cooling the mould
    • B22D27/045Directionally solidified castings
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K31/00Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
    • B23K31/02Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23PMETAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P6/00Restoring or reconditioning objects
    • B23P6/002Repairing turbine components, e.g. moving or stationary blades, rotors
    • B23P6/007Repairing turbine components, e.g. moving or stationary blades, rotors using only additive methods, e.g. build-up welding
    • CCHEMISTRY; METALLURGY
    • C30CRYSTAL GROWTH
    • C30BSINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
    • C30B11/00Single-crystal growth by normal freezing or freezing under temperature gradient, e.g. Bridgman-Stockbarger method
    • CCHEMISTRY; METALLURGY
    • C30CRYSTAL GROWTH
    • C30BSINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
    • C30B13/00Single-crystal growth by zone-melting; Refining by zone-melting
    • CCHEMISTRY; METALLURGY
    • C30CRYSTAL GROWTH
    • C30BSINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
    • C30B29/00Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
    • C30B29/10Inorganic compounds or compositions
    • C30B29/52Alloys
    • CCHEMISTRY; METALLURGY
    • C30CRYSTAL GROWTH
    • C30BSINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
    • C30B33/00After-treatment of single crystals or homogeneous polycrystalline material with defined structure
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00Articles made by soldering, welding or cutting
    • B23K2101/001Turbines
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05DINDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00Materials; Properties thereof
    • F05D2300/60Properties or characteristics given to material by treatment or manufacturing
    • F05D2300/606Directionally-solidified crystalline structures

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Laser Beam Processing (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
DE60305009T 2002-02-27 2003-02-04 Verfahren zur beseitigung von gussfehlern Expired - Lifetime DE60305009T2 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP02405142 2002-02-27
EP02405142A EP1340567A1 (de) 2002-02-27 2002-02-27 Verfahren zum Entfernen von Gussfehlern
PCT/IB2003/000362 WO2003072284A2 (en) 2002-02-27 2003-02-04 Method of removing casting defects

Publications (2)

Publication Number Publication Date
DE60305009D1 true DE60305009D1 (de) 2006-06-08
DE60305009T2 DE60305009T2 (de) 2007-04-19

Family

ID=27675797

Family Applications (1)

Application Number Title Priority Date Filing Date
DE60305009T Expired - Lifetime DE60305009T2 (de) 2002-02-27 2003-02-04 Verfahren zur beseitigung von gussfehlern

Country Status (6)

Country Link
US (1) US7169242B2 (de)
EP (2) EP1340567A1 (de)
CN (1) CN100528410C (de)
AU (1) AU2003205952A1 (de)
DE (1) DE60305009T2 (de)
WO (1) WO2003072284A2 (de)

Families Citing this family (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1340567A1 (de) 2002-02-27 2003-09-03 ALSTOM (Switzerland) Ltd Verfahren zum Entfernen von Gussfehlern
DE60225569T2 (de) * 2002-12-06 2009-09-03 Alstom Technology Ltd. Verfahren zur örtlichen Abscheidung einer MCrAlY - Beschichtung
EP1561536A1 (de) * 2004-02-03 2005-08-10 Siemens Aktiengesellschaft Reparatur-Lotverfahren zum Reparieren eines Bauteils, welches ein Basismaterial mit einer gerichteten Mikrostruktur umfasst
US20060071791A1 (en) * 2004-09-29 2006-04-06 Honeywell International Inc. Enhanced RFID vehicle presence detection system
US8367963B2 (en) 2004-10-29 2013-02-05 United Technologies Corporation Method and apparatus for microplasma spray coating a portion of a turbine vane in a gas turbine engine
US7763823B2 (en) 2004-10-29 2010-07-27 United Technologies Corporation Method and apparatus for microplasma spray coating a portion of a compressor blade in a gas turbine engine
US8067711B2 (en) * 2005-07-14 2011-11-29 United Technologies Corporation Deposition apparatus and methods
EP1910006B1 (de) 2005-07-22 2011-12-21 Siemens Aktiengesellschaft Verfahren zum reparieren eines mit einer gerichteten mikrostruktur umfassenden bauteils, durch einstellung während der elektron- oder der laser-wärmeeinwirkung eines temperaturgradient
EP1772228A1 (de) * 2005-10-07 2007-04-11 Siemens Aktiengesellschaft Verfahren zum Reparieren eines Bauteils mit einer gerichteten Mikrostruktur
US7784668B2 (en) * 2005-12-16 2010-08-31 United Technologies Corporation Repair method for propagating epitaxial crystalline structures by heating to within 0-100° f of the solidus
DE102006026704A1 (de) * 2006-06-08 2007-12-13 Mtu Aero Engines Gmbh Verfahren zur Herstellung oder Reparatur von Turbinen- oder Triebwerksbauteilen, sowie Bauteil, nämlich Turbinen- oder Triebwerksbauteil
US7578178B2 (en) * 2007-09-28 2009-08-25 United Technologies Corporation Method of inspecting turbine internal cooling features using non-contact scanners
EP2047940A1 (de) * 2007-10-08 2009-04-15 Siemens Aktiengesellschaft Aufheiztemperatur während Schweißarbeiten
WO2009047024A1 (en) * 2007-10-08 2009-04-16 Siemens Aktiengesellschaft Preheating temperature during remelting
DE102008016170A1 (de) * 2008-03-28 2009-10-01 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Bauteil mit sich überlappenden Schweißnähten und ein Verfahren zur Herstellung
US8809724B2 (en) 2008-08-04 2014-08-19 General Electric Company Strategically placed large grains in superalloy casting to improve weldability
EP2322314A1 (de) * 2009-11-16 2011-05-18 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Einkristallines Schweissen von direktional verfestigten Werkstoffen
JP2011212730A (ja) * 2010-04-01 2011-10-27 Hitachi Ltd 肉盛溶接方法およびレーザ肉盛溶接装置
US9623509B2 (en) * 2011-01-10 2017-04-18 Arcelormittal Method of welding nickel-aluminide
US9283593B2 (en) 2011-01-13 2016-03-15 Siemens Energy, Inc. Selective laser melting / sintering using powdered flux
US9352419B2 (en) 2011-01-13 2016-05-31 Siemens Energy, Inc. Laser re-melt repair of superalloys using flux
US9174314B2 (en) * 2011-11-03 2015-11-03 Siemens Energy, Inc. Isothermal structural repair of superalloy components including turbine blades
EP2591872A1 (de) * 2011-11-11 2013-05-15 Siemens Aktiengesellschaft Umschmelzverfahren und anschließendes Auffüllen und Bauteil
EP2754530B1 (de) * 2013-01-11 2017-03-29 Siemens Aktiengesellschaft Verfahrweise beim Umschmelzen von Rissen
EP2756916A1 (de) * 2013-01-18 2014-07-23 Siemens Aktiengesellschaft Zweimaliges Umschmelzen unter verschiedenen Richtungen
EP2756915A1 (de) * 2013-01-18 2014-07-23 Siemens Aktiengesellschaft Auftragsschweißen mit vorherigem Umschmelzen
CN103084563B (zh) * 2013-02-27 2016-01-20 南京信息工程大学 一种修补普通碳钢机械零件表面损伤的方法
EP2969362A1 (de) * 2013-03-13 2016-01-20 Rolls-Royce Corporation Variabler arbeitsabstand für eine abscheidung
EP2859989A1 (de) * 2013-10-08 2015-04-15 Siemens Aktiengesellschaft Verfahren zur Reparatur von dünnen Wänden
US10265764B2 (en) 2014-01-28 2019-04-23 General Electric Company Casting method and cast article
US9555471B2 (en) * 2014-01-28 2017-01-31 General Electric Company Casting method and cast article
GB201500304D0 (en) 2015-01-09 2015-02-25 Rolls Royce Plc A method of surface-treating a cast intermetallic component
DE102015207212B4 (de) 2015-04-21 2017-03-23 MTU Aero Engines AG Reparatur von einkristallinen Strömungskanalsegmenten mittels einkristallinem Umschmelzen
CN108188508B (zh) * 2017-11-29 2019-03-05 重庆运城制版有限公司 一种修版方法
WO2019208270A1 (ja) * 2018-04-27 2019-10-31 株式会社Ihi 補修用レーザ溶接方法及び補修用レーザ溶接装置
US10759004B2 (en) * 2018-06-18 2020-09-01 Raytheon Technologies Corporation Laser removal of casting scale
MX2021005735A (es) 2018-11-15 2021-08-19 Westinghouse Electric Belgium Proceso de reparación usando deposición de polvo de metal por láser.
BE1026209B1 (fr) * 2018-11-15 2019-11-07 Westinghouse Electric Belgium Procédé de réparation par dépôt de poudre métallique au laser
CN109848521A (zh) * 2019-01-11 2019-06-07 常州轻工职业技术学院 一种铸件表面小气孔的焊修方法
US12496661B2 (en) 2019-01-16 2025-12-16 Magna International Inc. Method of removal of heat checking
CN109551168B (zh) * 2019-01-17 2020-04-03 惠州市普盈金属科技有限公司 一种金属异形材表面微裂痕的精加工处理方法
KR102626244B1 (ko) * 2019-07-30 2024-01-17 지멘스 에너지, 인코포레이티드 고온 가스 터빈 컴포넌트들을 보수하기 위한 시스템 및 방법
CN113355667B (zh) * 2021-05-20 2023-03-31 西安欧中材料科技有限公司 一种镍基高温合金锻造模具表面微裂纹修复方法

Family Cites Families (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3310423A (en) * 1963-08-27 1967-03-21 Metco Inc Flame spraying employing laser heating
US3690367A (en) 1968-07-05 1972-09-12 Anadite Inc Apparatus for the restructuring of metals
US4714101A (en) * 1981-04-02 1987-12-22 United Technologies Corporation Method and apparatus for epitaxial solidification
JPS59152029A (ja) * 1983-02-15 1984-08-30 Mitsubishi Heavy Ind Ltd 鋳造欠陥補修方法
JPS60167723A (ja) * 1984-02-03 1985-08-31 Mitsubishi Heavy Ind Ltd 鋳造欠陥の補修方法
US4705203A (en) * 1986-08-04 1987-11-10 United Technologies Corporation Repair of surface defects in superalloy articles
GB2210291B (en) 1987-09-30 1991-01-30 Kansai Paint Co Ltd Method of remedying coating
US4878953A (en) * 1988-01-13 1989-11-07 Metallurgical Industries, Inc. Method of refurbishing cast gas turbine engine components and refurbished component
CN1030040A (zh) * 1988-04-05 1989-01-04 重庆大学 铸件表面缺陷修补新方法
US4969501A (en) 1989-11-09 1990-11-13 Pcc Airfoils, Inc. Method and apparatus for use during casting
CA2034370A1 (en) * 1990-03-30 1991-10-01 Peter W. Mueller Process for identification evaluation and removal of microshrinkage
DE4039807C1 (de) * 1990-12-13 1991-10-02 Mtu Muenchen Gmbh
US5312584A (en) 1992-02-18 1994-05-17 General Motors Corporation Moldless/coreless single crystal castings of nickel-aluminide
DE59208497D1 (de) 1992-03-02 1997-06-19 Sulzer Innotec Ag Freiformschweissen von Metallstrukturen mit Laser
US5914059A (en) 1995-05-01 1999-06-22 United Technologies Corporation Method of repairing metallic articles by energy beam deposition with reduced power density
US5900170A (en) 1995-05-01 1999-05-04 United Technologies Corporation Containerless method of producing crack free metallic articles by energy beam deposition with reduced power density
DE19539770A1 (de) 1995-06-20 1997-01-02 Abb Research Ltd Verfahren zur Herstellung eines gerichtet erstarrten Gießkörpers und Vorrichtung zur Durchführung dieses Verfahrens
US5837960A (en) 1995-08-14 1998-11-17 The Regents Of The University Of California Laser production of articles from powders
WO1997019200A1 (en) * 1995-11-21 1997-05-29 Opticast Ab Improved method for optimization of the grain refinement of aluminium alloys
DE19547903C1 (de) * 1995-12-21 1997-03-20 Mtu Muenchen Gmbh Verfahren zur Herstellung oder Instandsetzung von Schaufeln für Turbomaschinen mittels Laserstrahlauftragsschweißen unter Verwendung eines Metallpulvers als Zusatzwerkstoff, sowie Stützform zur Herstellung oder Instandsetzung derartiger Schaufeln und Verfahren zur Herstellung der Stützform
EP0861927A1 (de) * 1997-02-24 1998-09-02 Sulzer Innotec Ag Verfahren zum Herstellen von einkristallinen Strukturen
US6615470B2 (en) * 1997-12-15 2003-09-09 General Electric Company System and method for repairing cast articles
US6084196A (en) 1998-02-25 2000-07-04 General Electric Company Elevated-temperature, plasma-transferred arc welding of nickel-base superalloy articles
US6054672A (en) 1998-09-15 2000-04-25 Chromalloy Gas Turbine Corporation Laser welding superalloy articles
DE19949972C1 (de) 1999-10-11 2001-02-08 Fraunhofer Ges Forschung Verfahren zur Herstellung von Formkörpern oder zum Auftragen von Beschichtungen
US7204019B2 (en) * 2001-08-23 2007-04-17 United Technologies Corporation Method for repairing an apertured gas turbine component
EP1340567A1 (de) 2002-02-27 2003-09-03 ALSTOM (Switzerland) Ltd Verfahren zum Entfernen von Gussfehlern

Also Published As

Publication number Publication date
CN1638897A (zh) 2005-07-13
US7169242B2 (en) 2007-01-30
EP1478482B1 (de) 2006-05-03
WO2003072284A8 (en) 2004-10-07
WO2003072284A2 (en) 2003-09-04
WO2003072284A3 (en) 2003-11-13
EP1478482A2 (de) 2004-11-24
CN100528410C (zh) 2009-08-19
DE60305009T2 (de) 2007-04-19
AU2003205952A8 (en) 2003-09-09
US20050067065A1 (en) 2005-03-31
EP1340567A1 (de) 2003-09-03
AU2003205952A1 (en) 2003-09-09

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