EP0562920B1 - Verfahren zum Beschichten einer Vertiefung eines Nickelsubstrates mittels Laser - Google Patents

Verfahren zum Beschichten einer Vertiefung eines Nickelsubstrates mittels Laser Download PDF

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Publication number
EP0562920B1
EP0562920B1 EP93400697A EP93400697A EP0562920B1 EP 0562920 B1 EP0562920 B1 EP 0562920B1 EP 93400697 A EP93400697 A EP 93400697A EP 93400697 A EP93400697 A EP 93400697A EP 0562920 B1 EP0562920 B1 EP 0562920B1
Authority
EP
European Patent Office
Prior art keywords
notch
laser beam
angle
making
powder
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
EP93400697A
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English (en)
French (fr)
Other versions
EP0562920A1 (de
Inventor
Emmanuel Kerrand
Frederic Cariou
Didier Boucachard
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.)
European Gas Turbines SA
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European Gas Turbines SA
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Filing date
Publication date
Application filed by European Gas Turbines SA filed Critical European Gas Turbines SA
Publication of EP0562920A1 publication Critical patent/EP0562920A1/de
Application granted granted Critical
Publication of EP0562920B1 publication Critical patent/EP0562920B1/de
Anticipated expiration legal-status Critical
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    • 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
    • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • 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
    • C23C24/00—Coating starting from inorganic powder
    • C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
    • C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
    • 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
    • C23C26/00—Coating not provided for in groups C23C2/00 - C23C24/00
    • C23C26/02—Coating not provided for in groups C23C2/00 - C23C24/00 applying molten material to the substrate

Definitions

  • the present invention relates to a method of coating an inverted Z-shaped notch of nickel alloy parts having a flat wall preceded by a rounded one. These parts are in particular fins of gas turbine made of nickel alloy which are difficult to weld.
  • the method according to the invention making it possible to obtain a non-cracking anti-wear metallic coating having a good metallic bond with the substrate in the contact areas of complex shapes is characterized in that a laser beam is orientable and relatively displaceable by relative to the plane wall of the notch and making a fixed angle ⁇ 2 with respect to a powder beam, the laser beam making an angle ⁇ with respect to the normal N to the plane wall of the notch and, the direction of the beam of powder an angle ⁇ + ⁇ 2 with said normal N, in that during the preparation of the various layers several longitudinal passes are made at constant speed starting from the bottom of the notch towards the edge, the meeting point 0 between the laser beam and the direction of projection of the powder remaining stationary for a few tenths of a second on the rounding of the notch at the start of each longitudinal pass and in that during the preparation of the first layer the aryl ⁇ remains constant and equal to an angle ⁇ 1 less than 30 ° while during the development of the following layers the angle ⁇ at the start of each first takes a
  • the contact point 0 at the start of the passes is positioned in the rounding inside the material.
  • Figure 1 shows the part provided with its coating before and after machining.
  • FIG. 2 represents the deposition of the first layer on the rounding of the notch.
  • FIG. 3 represents the deposition of the first layer on the flat face of the notch.
  • FIG. 4 represents the first phase of the deposition of a subsequent layer on the rounding of the notch.
  • FIG. 5 represents the second phase of the deposit of FIG. 4.
  • Figure 6 shows the deposition of the layer of Figures 4 and 5 on the flat face of the notch.
  • FIG. 7 represents the section of FIG. 1.
  • the raw profile 1 of the nickel alloy blade is shown in dotted lines in FIG. 1.
  • This profile is in the form of an "inverted Z" and comprises in the intermediate part of the "inverted Z" a notch 2 consisting of a part rounded 3 followed by a flat part 4 corresponding to the intermediate part of the "inverted Z".
  • the notch 2 is coated with several layers 5, 5 ′, planes parallel to the planar part 4 using a CO2 laser in the beam of which a metallic powder is sprayed.
  • Each layer 5 consists of several adjacent beads 6 deposited during successive passes (see FIG. 7).
  • the deposit consists of a non-cracking anti-wear metallic coating with a good metallic bond with the Nickel alloy substrate.
  • the laser beam 8 is orientable and movable relative to the planar wall 4 of the notch 2.
  • the direction of the laser beam and the direction 9 of projection of the powder form a constant angle ⁇ 2 (see FIG. 2).
  • the laser beam 8 is inclined relative to the normal N to the plane wall 4 of the notch 2 at an angle ⁇ of a few tens of degrees. This angle depends on the blade profile.
  • the beam 8 makes an angle ⁇ with the normal N and the direction 9 of projection of the powder an angle ⁇ + ⁇ 2.
  • the angle of inclination of the laser beam 8 is fixed at ⁇ 1 and it will not be modified during the entire production of the first layer 5; in the specific example ⁇ 1 has been taken equal to 25 ° and is substantially parallel to the first branch 10 of the "inverted Z".
  • the intersection point 0 is positioned between the laser beam 8 and the powder beam 9 inside the material (a few tenths of a mm), which allows on the one hand to make up for the difference in altitude with the flat part 4 of the area to be coated and thus avoid any subsequent modification of its positioning when carrying out the pass in progress and on the other hand to maintain the powder beam 9 downstream from the laser beam / part contact point in order to ensure better fusion of the powder and to minimize the projection of particles towards the bottom of the notch 2 (FIG. 2).
  • the point of intersection 0 is moreover maintained a few tenths of a second inside the material without displacement in order to increase the laser / material interaction time and ensure a substrate melting.
  • the laser beam 8 / powder beam 9 assembly (angle ⁇ 2 contant) is then moved at constant speed to the edge 11 of the "inverted Z", the beam / powder intersection point being on the surface of the substrate (figure 3).
  • the operation is repeated until the first layer 5 is deposited.
  • the angle ⁇ 3 is therefore variable from layer to layer.
  • the point of intersection 0 beam / powder is inside the rounding material.
  • a rotation of the laser beam, powder 8, 9 assembly is then carried out at this point in a few tenths of a second ( ⁇ 1 s) in order to increase the interaction time and to replace the laser beam 8 in position to construct the new pass.
  • the laser beam 8 then makes the angle ⁇ 1 with the normal N and it is displaced as during the deposition of the first layer 5 with constant ⁇ 1 and ⁇ 2 from the bottom 3 of the notch 2 towards the edge 11 while remaining on the surface of the layer previously deposited (see Figure 6).
  • the coating deposited has the appearance shown in FIG. 7 with the various layers 5, 5 ′ made up of beads 12 produced during each pass.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Laser Beam Processing (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)

Claims (2)

  1. Verfahren zur Beschichtung einer Nut (2) eines Z-förmigen Werkstücks aus einer Nickellegierung, wobei die Nut (2) einen abgerundeten Grund (3) in der Innenwölbung des umgekehrten Z gefolgt von einer ebenen Wand (4) entsprechend dem Mittelbereich des umgekehrten Z aufweist und wobei mehrere Schichten (5, 5') aus einem metallischen abriebfesten Material auf die ebene Wand (4) der Nut (2) aufgebracht werden, dadurch gekennzeichnet, daß man einen Laserstrahl (8) verwendet, der bezüglich der ebenen Wand (4) der Nut (2) ausgerichtet und verschoben werden kann und einen festen Winkel α₂ bezüglich eines Pulverstrahls (9) besitzt sowie einen Winkel α bezüglich der Senkrechten N auf der ebenen Wand (4) der Nut (2) bildet, während die Richtung des Pulverstrahls (9) mit der Senkrechten N einen Winkel α+α₂ einschließt, daß bei der Herstellung der verschiedenen Schichten (5, 5') mehrere Längsdurchgänge mit konstanter Geschwindigkeit ausgehend vom Grund (4) der Nut (2) und in Richtung auf den Rand (11) fortschreitend erfolgen, wobei der Treffpunkt O zwischen dem Laserstrahl (8) und dem Pulverstrahl (9) einige Zehntel Sekunden lang in der Innenwölbung (3) der Nut (2) zu Beginn jedes Längsdurchlaufs verharrt, und daß bei der Herstellung der ersten Schicht (5) der Winkel α konstant bleibt und gleich einem Winkel α₁ unterhalb von 30° gewählt wird, während bei der Herstellung der nachfolgenden Schichten (5') der Winkel α zu Beginn einen größeren Wert als α₁ annimmt, damit der Laserstrahl möglichst nahe bei der Senkrechten auf der Wölbung (3) liegt, worauf der Laserstrahl (8) und der Pulverstrahl (9) um den Treffpunkt O gedreht werden, der unbewegt bleibt, bis der Laserstrahl (8) den Winkel α₁ annimmt und seine Bewegung für den Durchgang beginnt.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der Treffpunkt O zu Beginn der Durchgänge in der Innenwölbung innerhalb des Materials liegt.
EP93400697A 1992-03-23 1993-03-18 Verfahren zum Beschichten einer Vertiefung eines Nickelsubstrates mittels Laser Expired - Lifetime EP0562920B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9203459A FR2688803B1 (fr) 1992-03-23 1992-03-23 Procede de revetement d'une encoche d'une piece en alliage de nickel par laser.
FR9203459 1992-03-23

Publications (2)

Publication Number Publication Date
EP0562920A1 EP0562920A1 (de) 1993-09-29
EP0562920B1 true EP0562920B1 (de) 1995-09-20

Family

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Family Applications (1)

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EP93400697A Expired - Lifetime EP0562920B1 (de) 1992-03-23 1993-03-18 Verfahren zum Beschichten einer Vertiefung eines Nickelsubstrates mittels Laser

Country Status (4)

Country Link
US (1) US5372861A (de)
EP (1) EP0562920B1 (de)
DE (1) DE69300501T2 (de)
FR (1) FR2688803B1 (de)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2707677B1 (fr) * 1993-07-13 1995-08-25 Technogenia Plaque de défibrage ou de raffinage de pâte à papier, et procédé pour sa réalisation.
SE9303245L (sv) * 1993-10-05 1995-04-06 Johan Lennart Olofsson Förfarande för att förbättra bestämda egenskaper på järnvägshjul
EP0931180B1 (de) 1995-10-05 2000-12-20 BLZ Bayerisches Laserzentrum Gemeinnützige Forschungsgesellschaft mbH Verfahren zur herstellung eines schneidwerkzeuges
US5889254A (en) * 1995-11-22 1999-03-30 General Electric Company Method and apparatus for Nd: YAG hardsurfacing
EP0847314B1 (de) * 1996-04-17 1999-12-15 Koninklijke Philips Electronics N.V. Verfahren zur herstellung einer gesinterten struktur auf einem substrat
JP3591147B2 (ja) * 1996-07-19 2004-11-17 日産自動車株式会社 レーザービームによる肉盛方法
CA2207579A1 (fr) 1997-05-28 1998-11-28 Paul Caron Piece frittee a surface anti-abrasive et procede pour sa realisation
US6203861B1 (en) * 1998-01-12 2001-03-20 University Of Central Florida One-step rapid manufacturing of metal and composite parts
US20040086635A1 (en) * 2002-10-30 2004-05-06 Grossklaus Warren Davis Method of repairing a stationary shroud of a gas turbine engine using laser cladding
GB0504576D0 (en) * 2005-03-05 2005-04-13 Alstom Technology Ltd Turbine blades and methods for depositing an erosion resistant coating on the same
US7458765B2 (en) * 2005-09-23 2008-12-02 Fraunhofer Usa Diamond hard coating of ferrous substrates
WO2009100794A1 (de) * 2008-02-13 2009-08-20 Siemens Aktiengesellschaft Verfahren zum aufschmelzen von gekrümmten oberflächen und eine vorrichtung
GB2473232B (en) 2009-09-04 2011-12-07 Rolls Royce Plc Method of depositing material
FR3001758B1 (fr) * 2013-02-01 2016-07-15 Snecma Aube de rotor de turbomachine
US9358643B2 (en) * 2014-08-15 2016-06-07 Siemens Energy, Inc. Method for building a gas turbine engine component
US9359897B2 (en) * 2014-08-15 2016-06-07 Siemens Energy, Inc. Method for building a gas turbine engine component
EP3498383A3 (de) 2017-12-15 2019-09-25 Eloxalwerk Ludwigsburg Helmut Zerrer GmbH Vorrichtung zum beschichten eines werkstücks mit mindestens einem hochleistungspolymer; beschichtungsverfahren
DE102017011842A1 (de) 2017-12-15 2019-06-19 ELOXALWERK Ludwigsburg Helmut Zerrer GmbH Beschichtungsdispersion; Herstellungsverfahren einer Beschichtungsdispersion

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4291448A (en) * 1977-12-12 1981-09-29 Turbine Components Corporation Method of restoring the shrouds of turbine blades
GB1574984A (en) * 1978-05-15 1980-09-17 Atomic Energy Authority Uk Laser powder metallurgy
IT1172891B (it) * 1978-07-04 1987-06-18 Fiat Spa Procedimento per rivestire con materiale antiusura una superficie metallica
US4275124A (en) * 1978-10-10 1981-06-23 United Technologies Corporation Carbon bearing MCrAlY coating
GB2052566B (en) * 1979-03-30 1982-12-15 Rolls Royce Laser aplication of hard surface alloy
US4299860A (en) * 1980-09-08 1981-11-10 The United States Of America As Represented By The Secretary Of The Navy Surface hardening by particle injection into laser melted surface
IT1179061B (it) * 1984-08-20 1987-09-16 Fiat Auto Spa Procedimento per l'effettuazione di un trattamento su pezzi metallici con l'aggiunta di un materiale d'apporto e con l'impiego di un laser di potenza
US4743733A (en) * 1984-10-01 1988-05-10 General Electric Company Method and apparatus for repairing metal in an article
US4710102A (en) * 1984-11-05 1987-12-01 Ortolano Ralph J Connected turbine shrouding
DE3509582C1 (de) * 1985-03-16 1986-02-20 M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8000 München Metallrad, insbesondere Eisenbahnrad
JPH0698506B2 (ja) * 1986-12-08 1994-12-07 トヨタ自動車株式会社 金属基体上への分散合金層の形成方法
FR2612106B1 (fr) * 1987-03-09 1989-05-19 Alsthom Procede de pose d'un revetement protecteur sur une aube en alliage de titane et aube ainsi revetue
IL92428A (en) * 1989-02-08 1992-12-01 Gen Electric Fabrication of components by layered deposition
ES2056430T3 (es) * 1989-12-27 1994-10-01 Sulzer Innotec Ag Dispositivo para soldar y/o recubrir piezas de trabajo, toberas para un dispositivo de este tipo asi como manipulador para la tobera de un dispositivo de este tipo.
DE4015206C1 (de) * 1990-05-11 1991-10-17 Mtu Muenchen Gmbh
US5120197A (en) * 1990-07-16 1992-06-09 General Electric Company Tip-shrouded blades and method of manufacture
US5083903A (en) * 1990-07-31 1992-01-28 General Electric Company Shroud insert for turbomachinery blade

Also Published As

Publication number Publication date
DE69300501T2 (de) 1996-02-22
FR2688803A1 (fr) 1993-09-24
US5372861A (en) 1994-12-13
FR2688803B1 (fr) 1994-05-06
DE69300501D1 (de) 1995-10-26
EP0562920A1 (de) 1993-09-29

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