EP0379699B1 - Verfahren zur Erhöhung des Korrosions- und Erosionswiderstandes einer Schaufel einer rotierenden thermischen Maschine und nach diesem Verfahren hergestellte Schaufel - Google Patents

Verfahren zur Erhöhung des Korrosions- und Erosionswiderstandes einer Schaufel einer rotierenden thermischen Maschine und nach diesem Verfahren hergestellte Schaufel Download PDF

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Publication number
EP0379699B1
EP0379699B1 EP89123291A EP89123291A EP0379699B1 EP 0379699 B1 EP0379699 B1 EP 0379699B1 EP 89123291 A EP89123291 A EP 89123291A EP 89123291 A EP89123291 A EP 89123291A EP 0379699 B1 EP0379699 B1 EP 0379699B1
Authority
EP
European Patent Office
Prior art keywords
blade
weight
corrosion
base material
protective layer
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
EP89123291A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0379699A1 (de
Inventor
Benno Basler
Tibor Koromzay
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.)
ABB Asea Brown Boveri Ltd
Original Assignee
ABB Asea Brown Boveri Ltd
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 ABB Asea Brown Boveri Ltd filed Critical ABB Asea Brown Boveri Ltd
Publication of EP0379699A1 publication Critical patent/EP0379699A1/de
Application granted granted Critical
Publication of EP0379699B1 publication Critical patent/EP0379699B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • F01D5/288—Protective coatings for blades
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
    • C23C4/06—Metallic material
    • C23C4/067—Metallic material containing free particles of non-metal elements, e.g. carbon, silicon, boron, phosphorus or arsenic
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/922—Static electricity metal bleed-off metallic stock
    • Y10S428/9335—Product by special process
    • Y10S428/937—Sprayed metal
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12736—Al-base component
    • Y10T428/1275—Next to Group VIII or IB metal-base component
    • Y10T428/12757—Fe

Definitions

  • the invention relates to a method according to the introductory part of patent claim 1.
  • the invention also relates to a blade which can be obtained by the method according to patent claim 1.
  • Rotating thermal machines are mainly steam turbines, gas turbines and turbo compressors.
  • the blades used in these machines are to be effectively protected against operational attacks, in particular erosion and corrosion, but also oxidation, wear and damage.
  • the blades of rotating thermal machines are often provided with protective layers. This is used in both steam and gas turbine blades as well as compressor blades. The main thing is to increase resistance to corrosion and oxidizing attack as well as erosion and wear (wear and tear).
  • the elements Cr, Al, Si forming the oxide cover layers occupy a special position.
  • Layers that have a high Al content have been used, among other things, as filler material for carbide-containing coatings (Cr2C3; WC) in engine construction.
  • the invention is based on the object of a method for increasing the corrosion (Cl and SO4 ions) and erosion resistance (particle and drop impact erosion) of a blade of a rotating thermal machine in the presence of H2O- Steam and at comparatively moderate temperatures (450 ° C), which is particularly suitable for ferritic and / or ferritic-martensitic base material of the blade.
  • the invention as defined in claim 5, is also based on the object of specifying a blade obtained by the method according to claim 1, in which a long service life is ensured by avoiding or at least delaying the occurrence of pitting corrosion.
  • a compressor blade for an axial compressor was provided with a protective layer.
  • the scoop was first degreased and cleaned in trichloroethane, whereupon the blade and the pale / foot transition were sandblasted.
  • the coating of the blade was carried out using a high-speed flame spraying process with a particle speed of 400 m / s and a gas speed of 1000 m / s with nitrogen as the conveying gas.
  • the aluminum alloy powder was conveyed by means of nitrogen into a combustion chamber operated with propane and oxygen.
  • the liquefied particles were thrown onto the workpiece as fine drops under high excess pressure.
  • the blade stood in a device that covered the blade root.
  • the protective layer was applied with the hand-held spray gun.
  • the applied protective layer was measured using a metallographic cut and was in Average 8 to 15 ⁇ m.
  • a plastic in the present case polytetrafluoroethylene was applied to this metal protective layer using a conventional paint spraying process.
  • This smooth surface layer had an average thickness of 6 to 10 ⁇ m and a roughness of approximately 2 ⁇ m.
  • the coated compressor blade was subjected to a corrosion resistance test. For this purpose, it was immersed in a test solution and then stored in a climatic cabinet for 4 hours. This cycle was repeated a total of 60 times.
  • a compressor blade of the same dimensions and composition was coated according to Example 1 with an aluminum alloy and a plastic. Now a scratch of 10 mm in length and a total of 25 ⁇ m in depth parallel to the longitudinal axis was made on the coated blade, the profile of which just barely grasped the base material with its tip. The blade was then subjected to the same corrosion tests as in Example 1. Thanks to the local element formation (aluminum layer functions as a "sacrificial anode”), the base material was largely protected, while the aluminum layer on the flanks of the scratch was only slightly degraded.
  • the protective layer according to the invention can be expected to have a long service life under practical conditions of use.
  • a compressor blade was provided with a protective layer.
  • the material of the blade consisted of a martensitic-austenitic two-phase steel with a low austenite content and was available in a tempered condition.
  • the aluminum alloy was sprayed on using an industrial robot. 3 spray coats were carried out. The thickness of the applied layer averaged 90 to 100 ⁇ m. A plastic layer of approx. 10 to 15 ⁇ m thickness was additionally applied to this metal protective layer using a conventional paint spraying process. The coated blade was subjected to the same corrosion test as in Example 1. No attack was then found.
  • a used compressor blade with wing profile was provided with a protective layer.
  • the metal layer was sprayed on by hand using the high-speed flame spraying process.
  • the thickness of the protective layer fluctuated between 25 and 45 ⁇ m.
  • the metallographic tests after the corrosion test indicated above showed an unchanged, unaffected surface zone.
  • the invention is not restricted to the exemplary embodiments.
  • the method for increasing the corrosion and erosion resistance of a blade of a rotating thermal machine which essentially consists of a ferritic and / or ferritic-martensitic base material, is carried out by applying a firmly adhering surface protective layer, in that one of 6 to 15 parts by weight % Silicon and the remainder essentially aluminum protective layer is sprayed onto the surface of the base material by the high-speed process with a particle speed of at least 300 m / s.
  • the base material consists of a chromium-containing steel with 12 to 13 wt .-% chromium and other additives.
  • the protective layer advantageously contains 10 to 12% by weight of silicon and the remainder essentially aluminum.
  • a cover layer made of a heat-resistant plastic is preferably additionally applied to said protective layer.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Plasma & Fusion (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
EP89123291A 1989-01-26 1989-12-15 Verfahren zur Erhöhung des Korrosions- und Erosionswiderstandes einer Schaufel einer rotierenden thermischen Maschine und nach diesem Verfahren hergestellte Schaufel Expired - Lifetime EP0379699B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH252/89 1989-01-26
CH252/89A CH678067A5 (ko) 1989-01-26 1989-01-26

Publications (2)

Publication Number Publication Date
EP0379699A1 EP0379699A1 (de) 1990-08-01
EP0379699B1 true EP0379699B1 (de) 1993-10-06

Family

ID=4182772

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89123291A Expired - Lifetime EP0379699B1 (de) 1989-01-26 1989-12-15 Verfahren zur Erhöhung des Korrosions- und Erosionswiderstandes einer Schaufel einer rotierenden thermischen Maschine und nach diesem Verfahren hergestellte Schaufel

Country Status (5)

Country Link
US (1) US5120613A (ko)
EP (1) EP0379699B1 (ko)
JP (1) JP2895135B2 (ko)
CH (1) CH678067A5 (ko)
DE (1) DE58905843D1 (ko)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9218859D0 (en) * 1992-09-05 1992-10-21 Rolls Royce Plc Aluminide-silicide coatings
DE59304920D1 (de) * 1992-10-05 1997-02-06 Siemens Ag Schutz gegen korrosive und erosive angriffe bei temperaturen bis etwa 500 grad celsius für ein aus chromstahl bestehendes substrat
SE508860C2 (sv) * 1997-03-18 1998-11-09 Abb Stal Ab Anordning vid en i en rotormaskin anordnad ledskena samt en vridbar turbinskena
EP1181437B1 (de) * 1999-05-14 2004-04-21 Siemens Aktiengesellschaft Dampfturbinenbauteil sowie verfahren zur herstellung einer schutzbeschichtung auf dem bauteil
US7546683B2 (en) * 2003-12-29 2009-06-16 General Electric Company Touch-up of layer paint oxides for gas turbine disks and seals
DE102007028321A1 (de) * 2007-06-15 2008-12-18 Alstom Technology Ltd. Verfahren zur Oberflächenbehandlung von Cr-Stählen
FR2978931B1 (fr) * 2011-08-10 2014-05-09 Snecma Procede de realisation d'un renfort de protection du bord d'attaque d'une pale
US9309895B2 (en) 2012-06-18 2016-04-12 Kennametal Inc. Closed impeller with a coated vane
US9737933B2 (en) 2012-09-28 2017-08-22 General Electric Company Process of fabricating a shield and process of preparing a component
KR20160053121A (ko) * 2014-10-31 2016-05-13 현대자동차주식회사 자동차용 쉬프트포크 코팅방법 및 이를 이용한 비정질 코팅층이 형성된 쉬프트포크
JP6375238B2 (ja) * 2015-02-05 2018-08-15 三菱日立パワーシステムズ株式会社 蒸気タービン及びその表面処理方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU34348A1 (ko) * 1955-05-02
GB973012A (en) * 1962-03-27 1964-10-21 Grundy Teddington Ltd Method of marking metal articles such as casks and like containers
JPS56102546A (en) * 1980-01-22 1981-08-17 Toyota Motor Corp Sliding member
GB2116215B (en) * 1982-03-06 1985-09-25 Rolls Royce Improvements in or relating to flame sprayed coatings
US4500364A (en) * 1982-04-23 1985-02-19 Exxon Research & Engineering Co. Method of forming a protective aluminum-silicon coating composition for metal substrates
DE3247054C1 (de) * 1982-12-20 1984-05-10 Goetze Ag, 5093 Burscheid Spritzpulver fuer die Herstellung verschleissfester Beschichtungen
JPS60149761A (ja) * 1984-01-13 1985-08-07 Showa Denko Kk 耐食被覆方法
US4707379A (en) * 1985-12-24 1987-11-17 Ceskoslovenska Akademie Ved Protective layer for carbonaceous materials and method of applying the same
JPS63303048A (ja) * 1987-06-03 1988-12-09 Toyota Motor Corp シフトフオ−ク

Also Published As

Publication number Publication date
JP2895135B2 (ja) 1999-05-24
US5120613A (en) 1992-06-09
JPH02230902A (ja) 1990-09-13
CH678067A5 (ko) 1991-07-31
DE58905843D1 (de) 1993-11-11
EP0379699A1 (de) 1990-08-01

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