EP0341456B1 - Verfahren zur Erzeugung galvanisch abgeschiedener Heissgaskorrosionsschichten - Google Patents

Verfahren zur Erzeugung galvanisch abgeschiedener Heissgaskorrosionsschichten Download PDF

Info

Publication number
EP0341456B1
EP0341456B1 EP89106922A EP89106922A EP0341456B1 EP 0341456 B1 EP0341456 B1 EP 0341456B1 EP 89106922 A EP89106922 A EP 89106922A EP 89106922 A EP89106922 A EP 89106922A EP 0341456 B1 EP0341456 B1 EP 0341456B1
Authority
EP
European Patent Office
Prior art keywords
suspension
process according
powder
alloy powder
alloy
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
EP89106922A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0341456A3 (en
EP0341456A2 (de
Inventor
Monika Dr. Bindl
Paul Bünger
Josef Linska
Martin Dr. Thoma
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.)
MTU Aero Engines AG
Original Assignee
MTU Motoren und Turbinen Union Muenchen GmbH
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 MTU Motoren und Turbinen Union Muenchen GmbH filed Critical MTU Motoren und Turbinen Union Muenchen GmbH
Publication of EP0341456A2 publication Critical patent/EP0341456A2/de
Publication of EP0341456A3 publication Critical patent/EP0341456A3/de
Application granted granted Critical
Publication of EP0341456B1 publication Critical patent/EP0341456B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/48—After-treatment of electroplated surfaces
    • C25D5/50—After-treatment of electroplated surfaces by heat-treatment
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D15/00—Electrolytic or electrophoretic production of coatings containing embedded materials, e.g. particles, whiskers, wires
    • C25D15/02—Combined electrolytic and electrophoretic processes with charged materials

Definitions

  • the invention relates to a method for producing galvanically deposited hot gas corrosion layers according to the preamble of patent claim 1.
  • Metal layers consisting of an MCrAlY alloy have proven particularly suitable for this.
  • M stands for either nickel, cobalt or an alloy of the two. In special cases, iron can also be used.
  • the coated surface protecting effect is based on the fact that CrAl forms oxides at high temperatures (Cr2O3, Al2O3), which serve as protective films against further oxidation.
  • the alloys usually consist of approx. 15 - 25% Cr, 10 - 15% Al, 0.2 - 0.5% Y, balance M (each weight percent).
  • the share of Aluminum and chrome should be as high as possible so that the protective effect due to the oxide formation works properly.
  • Thermal spraying or PVD physical vapor deposition
  • PVD physical vapor deposition
  • the disadvantage of these application processes is above all the high process costs. Attempts have therefore been made to apply the protective layers by means of dispersion coating, since this would make it possible to achieve a considerably more economical procedure.
  • there were a number of disadvantages With conventional dispersion coating processes, only low installation rates of the suspension powder in the metal matrix could be achieved. These are in the range of 20 vol.%, Which means that the required high Cr and Al content cannot be achieved and the layer quality therefore remains inadequate. Shares of over 40 vol.% would be desirable in order to achieve the same layer quality as with PVD or plasma spraying.
  • the layers produced according to the invention are notable for an installation rate of up to 45% by volume, as a result of which the same layer quality can be achieved as with the known coating processes.
  • the production costs of the layers according to the invention are advantageously considerably lower. For example, compared to thermal spray coatings by a factor of 10.
  • the coating process is then followed by a heat treatment under vacuum for diffusion annealing, as a result of which alloying begins and a layer quality identical to the known spraying processes can be achieved.
  • the low suspension concentration of less than 100 g / l advantageously allows the use of uncomplicated, conventional dispersion separation techniques, which means that the effort, particularly with regard to series production, is considerably less than, for example, drum technology, which involves bath concentrations of at least 600 g / l is working.
  • a suspension concentration of 40-60 g / l proved to be particularly advantageous for achieving a high installation rate.
  • the shape and other properties of the suspension powder are considered to be immaterial.
  • powder particles of spherical shape and passivated surface allow considerably higher installation rates than conventional, in particular ground, powders.
  • the suspension concentration can be considerably reduced while the layer quality is increased at the same time.
  • a uniform layer structure is possible, in particular, through the passivation of the particle surface. This is due to the fact that a particle deposited on the substrate is non-conductive and therefore does not cause a negative change in the surrounding field line course. This advantageously enables undisturbed embedding and over-coating of the particle by means of matrix material. In a preferred development of the invention, this suspension concentration is between 40 and 60 g / l. This results in a particularly uniform layer structure.
  • CrAlY is preferably used as the metal powder, since the layer that can be achieved in this way has known good corrosion protection properties.
  • one or more of the following alloys can alternatively be used as powder: CrAlHf, CrAlYHf, CrAlTa, CrAlYTa, CrNiAl, CrCoAl, CrAlSi, CrAl, MoCrSi.
  • a particularly simple and cost-saving production of the suspension powder results since it is produced by spraying according to the invention.
  • favorable values for the particle diameter and the extent of the surface passivation can be set by setting the atomization parameters or the ambient gas atmosphere.
  • a particle size between 1 and 15 ⁇ m is usually selected.
  • the suspension is preferably kept distributed in the electrolyte by introduction of air, pumping around and / or stirring devices. In this way, according to the invention, the process is simplified compared to a drum arrangement with good mixing at the same time.
  • a co-electrolyte with 480 g / l CoSO4, 35 g / l H3BO3 and 20 g / l NaCl is given, with a pH between 4.5 and 4.7 is set.
  • a CrAlY suspension with spherical, passivated powder particles with a particle size of ⁇ 10 ⁇ m was added until a concentration of 100 g / l of the suspension resulted.
  • the turbine blades to be coated were then connected to the cathode and immersed in the bath.
  • a direct current of current density 2 A / dm 2 was set until a layer thickness of approximately 100 ⁇ m was achieved.
  • the turbine blades were then removed and a cross-section of one of them was made (FIG. 1).
  • An installation rate of about 45 vol.% Was found with a very even layer structure.
  • the turbine blades are then subjected to a temperature of 1050 ° C. in vacuo for 50 h. This results in an alloy formation, by which one of the known methods (PVD, thermal Spray) identical layer is produced.
  • 2a shows an element distribution image of chromium of a Co-CrAlY-coated sample immediately after the deposition.
  • 2b shows the chrome element distribution image after the heat treatment.
  • a CrAlY powder with a particle size ⁇ 10 .mu.m in a concentration of 300 g / l was added to the same electrolyte, the powder having been prepared by milling under organic liquid.
  • a micrograph (cross-section) of the layer obtained here is shown in FIG. 3, an installation rate of 15% by volume being achievable.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Engineering & Computer Science (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Powder Metallurgy (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Filtering Materials (AREA)
  • Hydrogen, Water And Hydrids (AREA)
  • Gas Separation By Absorption (AREA)
EP89106922A 1988-05-10 1989-04-18 Verfahren zur Erzeugung galvanisch abgeschiedener Heissgaskorrosionsschichten Expired - Lifetime EP0341456B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE3815976A DE3815976A1 (de) 1988-05-10 1988-05-10 Verfahren zur erzeugung galvanisch abgeschiedener heissgaskorrosionsschichten
DE3815976 1988-05-10
DE3935957A DE3935957C1 (enrdf_load_stackoverflow) 1988-05-10 1989-10-27

Publications (3)

Publication Number Publication Date
EP0341456A2 EP0341456A2 (de) 1989-11-15
EP0341456A3 EP0341456A3 (en) 1990-05-30
EP0341456B1 true EP0341456B1 (de) 1994-11-30

Family

ID=39427740

Family Applications (2)

Application Number Title Priority Date Filing Date
EP89106922A Expired - Lifetime EP0341456B1 (de) 1988-05-10 1989-04-18 Verfahren zur Erzeugung galvanisch abgeschiedener Heissgaskorrosionsschichten
EP90120273A Expired - Lifetime EP0424863B1 (de) 1988-05-10 1990-10-23 Verfahren zur Erzeugung galvanisch abgeschiedener Heissgaskorrosionsschichten

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP90120273A Expired - Lifetime EP0424863B1 (de) 1988-05-10 1990-10-23 Verfahren zur Erzeugung galvanisch abgeschiedener Heissgaskorrosionsschichten

Country Status (5)

Country Link
US (2) US4895625A (enrdf_load_stackoverflow)
EP (2) EP0341456B1 (enrdf_load_stackoverflow)
JP (2) JP2713458B2 (enrdf_load_stackoverflow)
DE (2) DE3815976A1 (enrdf_load_stackoverflow)
ES (1) ES2086348T3 (enrdf_load_stackoverflow)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3815976A1 (de) * 1988-05-10 1989-11-23 Mtu Muenchen Gmbh Verfahren zur erzeugung galvanisch abgeschiedener heissgaskorrosionsschichten
GB2254338B (en) * 1988-07-29 1993-02-03 Baj Ltd Improvements relating to the production of coatings
JP2949605B2 (ja) * 1991-09-20 1999-09-20 株式会社日立製作所 合金被覆ガスタービン翼及びその製造方法
GB9414859D0 (en) * 1994-07-22 1994-09-14 Baj Coatings Ltd Protective coating
GB9414858D0 (en) * 1994-07-22 1994-09-14 Baj Coatings Ltd Protective coating
US5613705A (en) * 1995-03-24 1997-03-25 Morton International, Inc. Airbag inflator having a housing protected from high-temperature reactive generated gases
DE10251902B4 (de) * 2002-11-07 2009-05-07 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren zum Beschichten eines Substrats und beschichteter Gegenstand
EP1428982B1 (en) * 2002-12-06 2009-02-04 ALSTOM Technology Ltd A method of depositing a local MCrAIY-coating
DE10259361A1 (de) * 2002-12-18 2004-07-08 Siemens Ag Verfahren und Vorrichtung zum Auffüllen von Materialtrennungen an einer Oberfläche
US7309412B2 (en) * 2003-04-11 2007-12-18 Lynntech, Inc. Compositions and coatings including quasicrystals
EP1533398B1 (de) * 2003-10-24 2011-08-31 Siemens Aktiengesellschaft Verfahren zur Erzeugung eines einsatzbereiten Elektrolyten aus metallionenhaltigen Abfallprodukte
WO2006017327A2 (en) * 2004-07-13 2006-02-16 University Of New Hampshire Electrocodeposition of lead free tin alloys
EP2119805A1 (de) * 2008-05-15 2009-11-18 Siemens Aktiengesellschaft Verfahren zur Herstellung einer optimierten Haftvermittlerschicht durch teilweise Verdampfung der Haftvermittlerschicht
DE102011100100A1 (de) * 2011-04-29 2012-10-31 Air Liquide Deutschland Gmbh Verfahren zum Behandeln einer Leitungskomponente
DE102013218687A1 (de) 2013-09-18 2015-04-02 MTU Aero Engines AG Galvanisch hergestellte Verschleißschutzbeschichtung und Verfahren hierfür
CN105598655A (zh) * 2016-03-02 2016-05-25 华北水利水电大学 一种用电火花沉积结合焊接增强金属水轮机转轮叶片表面的方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2014189B (en) * 1977-12-21 1982-06-09 Bristol Aerojet Ltd Processes for the electrodeposition of composite coatings
IT1224259B (it) * 1984-10-05 1990-10-04 Baj Ltd Perfezionamento nei rivestimenti metallici di protezione e procedimento di preparazione
GB2182055B (en) * 1985-10-28 1989-10-18 Baj Ltd Improvements relating to electrodeposited coatings
DE3815976A1 (de) * 1988-05-10 1989-11-23 Mtu Muenchen Gmbh Verfahren zur erzeugung galvanisch abgeschiedener heissgaskorrosionsschichten
GB8818069D0 (en) * 1988-07-29 1988-09-28 Baj Ltd Improvements relating to electrodeposited coatings

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
Plating and Surface Finishing, Oktober 1986, Seiten 42-46, J. Honey et al. "Electrodeposits for High-Temperature Corrosion Resistance" *
R.S. Sajfullin "Betriebspraxis Dispersionsschichten", Berlin 1978, Seite 25, Bild 8 *
Schriftenreihe Praxis-Forum 20/89, G. Lausmann "Neue Anwendungen von Nickel- Dispersions- und Chromschichten im Motorenbau" *

Also Published As

Publication number Publication date
JP3027600B2 (ja) 2000-04-04
DE3815976A1 (de) 1989-11-23
DE3815976C2 (enrdf_load_stackoverflow) 1990-02-15
EP0341456A3 (en) 1990-05-30
EP0424863B1 (de) 1996-04-17
US4895625A (en) 1990-01-23
DE3935957C1 (enrdf_load_stackoverflow) 1991-02-21
EP0424863A1 (de) 1991-05-02
JPH03173798A (ja) 1991-07-29
JP2713458B2 (ja) 1998-02-16
JPH0364497A (ja) 1991-03-19
EP0341456A2 (de) 1989-11-15
US5064510A (en) 1991-11-12
ES2086348T3 (es) 1996-07-01

Similar Documents

Publication Publication Date Title
EP0341456B1 (de) Verfahren zur Erzeugung galvanisch abgeschiedener Heissgaskorrosionsschichten
DE3535548C2 (de) Beschichteter Gegenstand und Verfahren zum Herstellen einer Beschichtung eines Gegenstandes
DE3104581C2 (de) Mit einer Deckschicht versehener Gegenstand aus einer Superlegierung und Verfahren zu seiner Herstellung
DE69301883T2 (de) Hochtemperatur-korrosionsbeständige zusammengesetzte Beschichtungen
DE3426201C2 (enrdf_load_stackoverflow)
DE2431448B2 (de) Verfahren zum beschichten eines substrates mit einem nitrid oder carbid von titan oder zirkonium durch reaktives aufdampfen
EP0663964B1 (de) Schutz gegen korrosive und erosive angriffe bei temperaturen bis etwa 500 grad celsius für ein aus chromstahl bestehendes substrat
DE3010608A1 (de) Ueberzugszusammensetzung fuer nickel, kobalt und eisen enthaltende superlegierung und superlegierungskomponente
DE3110358C2 (de) Pulverförmiges Überzugsmittel und Verfahren zum Aufbringen von Oberflächenüberzügen
CH694164A5 (de) Hochtemperatur-Komponente, insbesondere für eine Gasturbine, und Verfahren zu deren Herstellung.
DE2327250A1 (de) Verfahren zur herstellung eines metallurgisch abgedichteten ueberzugs
DE2801016A1 (de) Gegenstand aus einer superlegierung, der durch flammspritzen mit einem oxidations- und korrosionsbestaendigen ueberzug versehen ist sowie verfahren zu dessen herstellung
CH651070A5 (de) Als ueberzugsbeschichtung von stoffen auf nickelbasis verwendbare legierung.
DE3030961A1 (de) Bauteile aus superlegierungen mit einem oxidations- und/oder sulfidationsbestaendigigen ueberzug sowie zusammensetzung eines solchen ueberzuges.
CH657872A5 (de) Verbunderzeugnis aus mindestens zwei superlegierungen.
EP2851455B1 (de) Verfahren zur galvanischen Herstellung einer Verschleißschutzbeschichtung
EP2796588B1 (de) Verfahren zur Herstellung einer Hochtemperaturschutzbeschichtung
DE69533933T2 (de) Oxidationsbeständiger Bauteil auf Basis eines Titanlegierung-Substrats
EP1260602A1 (de) Verfahren zum Erzeugen eines wärmedämmenden Schichtsystems auf einem metallischen Substrat
CH616960A5 (en) Components resistant to high-temperature corrosion.
DE3907625C1 (enrdf_load_stackoverflow)
EP1097249B1 (de) Verfahren zur herstellung einer panzerung für ein metallisches bauteil
EP0316388B1 (de) Verfahren zur herstellung von oxidations- und heissgaskorrosionsschutzschichten
EP2607515A2 (de) Diffusionsbeschichtungsverfahren und damit hergestellte Chromschicht
EP1532286A1 (de) Korrosionsgeschütztes bauteil und verfahren zu seiner herstellung und einrichtung zur durchführung des verfahrens

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE FR GB IT SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE FR GB IT SE

17P Request for examination filed

Effective date: 19901116

17Q First examination report despatched

Effective date: 19920701

RBV Designated contracting states (corrected)

Designated state(s): FR GB IT SE

REG Reference to a national code

Ref country code: DE

Ref legal event code: 8566

ITF It: translation for a ep patent filed
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): FR GB IT SE

RIN1 Information on inventor provided before grant (corrected)

Inventor name: THOMA, MARTIN, DR.

Inventor name: BUENGER, PAUL

Inventor name: LINSKA, JOSEF

Inventor name: BINDL, MONIKA, DR.

ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19950304

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20050411

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20050412

Year of fee payment: 17

Ref country code: SE

Payment date: 20050412

Year of fee payment: 17

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060418

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060419

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20060430

Year of fee payment: 18

EUG Se: european patent has lapsed
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20060418

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20061230

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060502

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070418