EP1573092A2 - Procede et dispositif permettant de remplir des interruptions de materiau d'une surface - Google Patents

Procede et dispositif permettant de remplir des interruptions de materiau d'une surface

Info

Publication number
EP1573092A2
EP1573092A2 EP03767467A EP03767467A EP1573092A2 EP 1573092 A2 EP1573092 A2 EP 1573092A2 EP 03767467 A EP03767467 A EP 03767467A EP 03767467 A EP03767467 A EP 03767467A EP 1573092 A2 EP1573092 A2 EP 1573092A2
Authority
EP
European Patent Office
Prior art keywords
current
substrate
electrolyte
material separation
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.)
Withdrawn
Application number
EP03767467A
Other languages
German (de)
English (en)
Inventor
Ursus KRÜGER
Daniel Körtvelyessy
Ralph Reiche
Marc De Vogelaere
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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 Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP1573092A2 publication Critical patent/EP1573092A2/fr
Withdrawn legal-status Critical Current

Links

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
    • C25D5/02—Electroplating of selected surface areas
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D21/00—Processes for servicing or operating cells for electrolytic coating
    • C25D21/02—Heating or cooling
    • 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
    • C25D5/18—Electroplating using modulated, pulsed or reversing current

Definitions

  • the invention relates to a method and a device for filling material separations according to the preamble of claims 1 and 17, respectively.
  • Material separations on an inner and / or outer surface of a component - for example consisting of a substrate or a layer, such as. B. cracks, bores or production-related, operational notches often have to be closed again by welding or soldering processes. With these methods, high temperatures are used in the vicinity of the material separation to be filled, so that thermal stresses occur in the substrate / layer of a component, which can lead to cracks.
  • the material used in the welding or soldering processes to fill in the material separation often has a greatly reduced mechanical strength compared to the material of the substrate, which limits the repairability of the component.
  • FIG. 1 shows a device with which the method according to the invention is carried out.
  • FIG. 2 shows a crack that is filled step by step
  • FIG. 3 shows a time profile of a current between the substrate and the electrode
  • FIG. 4 shows a further time profile of a current between the substrate and the electrode
  • Figure 5 shows an expanded material separation
  • FIG. 1 shows a device 40 according to the invention with which the method according to the invention is carried out.
  • material is introduced into a material separation 4 of a substrate 1 or a layer 1 that extends from a surface 2.
  • the substrate 1 with its material separation 4 is electrically connected to an electrode 7, which are arranged together in an electrolyte 10, which is located in a container 46.
  • An electrical voltage source 25 is present between the electrode 7 and the substrate 1, so that an electrical current can flow.
  • the electrolyte 10 contains the material that is introduced into the material separation 4.
  • the electrolyte 10 can have components of the composition of the substrate 1 in the form of particles and / or ions in its solution.
  • the process of the method according to the invention can take place at room temperature or low temperatures, so that before the application of the method according to the invention, the substrate 1 is easily masked (waxes, where no coating is desired). Polymers) can be applied and protected against a coating.
  • the components for example an alloy, are deliberately separated from the electrolyte 10 into the material separation 4 of the component 1.
  • subsequent heat treatment can be used to set necessary material properties, such as B. is necessary for nickel and cobalt-based superalloys for turbine blades in order to obtain the desired ⁇ - ⁇ precipitations or to achieve a phase change or phase adjustment.
  • deposition of similar or similar material of the substrate 1 in the form of particles and / or ions achieves significantly better strength than with soldering or welding processes, since components foreign to the substrate penetrate into the material separation 4 through the soldering or welding additives. This is not the case with electrolytic deposition.
  • material of substrate 1 or layer 1 or material that has comparable properties can be used.
  • the deposition process in the material separation 4 can optionally be improved in the electrolyte 10 by an additional ultrasound excitation by means of at least one ultrasound probe 19, which is operated by an ultrasound source 22.
  • the ultrasonic excitation a constant
  • the method can be improved in that an eddy current probe 16 is arranged, for example placed on, in the area of the material separation 4, which creates a corresponding interaction volume 28 in the substrate 1 around the material separation 4, i.e. the interaction volume 28 is mechanically excited, i. H. Vibrations generated in the substrate 1.
  • the eddy current probe 16 for example, encloses the opening 43 of the material separation 4 on the surface 2 towards the electrolyte 10, but does not cover it.
  • the eddy current probe 16 is operated by a controllable eddy current generator 13.
  • the depth of penetration ⁇ i.e. the depth to which the interaction volume 28 extends from the surface 2 into the substrate 1 is given by the following formula:
  • f is the frequency of the eddy current
  • ⁇ is the conductivity of the substrate 1
  • ⁇ r is the permeability constant of the substrate / layer 1.
  • the penetration depth ⁇ and the interaction volume 28 can thus be set by the frequency f.
  • FIG. 2 shows how a material separation 4 of a substrate 1 can be filled up in an improved manner.
  • an area Ml is included in the area of the crack end 34 by choosing the frequency fl appropriately, so that the interaction volume 28 comprises the area Ml, during which Ml is filled up.
  • a second area M2 is filled with material, the frequency f2 being changed such that the interaction volume 28 only extends up to the previously filled area Ml or possibly only partially.
  • FIG. 3 shows a time course of the current of the voltage source 25. This can be formed from pulsed or time-changed currents and can be repeated periodically.
  • the current is composed mainly of cathodic (substrate 1) components and also of anodic components (electrode 7).
  • the pulse duration t on during which a current I flows, the pause t off between the pulses 40 and a maximum level of the current I max can be varied. It is also possible to change the shape 37 of the current signal. All parameters (I max , t off , t on , ..) can be a function of time and can be repeated periodically in order to optimize the process.
  • An alloy e.g. NiAL
  • NiAL NiAL
  • AI there are, for example, various optimal parameters (I max , t off , t on
  • a first current pulse 40 is optimal for the element nickel (ion in the electrolyte 10) and the second subsequent current pulses 40 for aluminum. Even with the current pulse matched to the one element, the other element is, albeit poorer, deposited. The pulses are repeated continuously so that the components of the alloy are optimally mixed.
  • the weight fraction of an alloy component in the material separation can be set by means of the pulse duration.
  • FIG. 4 shows an exemplary sequence of current pulses 40 which are repeated.
  • a sequence 34 consists of at least two blocks 77.
  • Block 77 consists of at least one current pulse 40.
  • a current pulse 40 is characterized by its duration t on , the height I max and its shape 37 (rectangle, triangle, ).
  • the pauses between the individual current pulses 40 (t off ) and the pauses between the blocks 77 are equally important as process parameters.
  • the sequence 34 consists, for example, of a first block 77 with three current pulses 40, between which in turn there is a pause. This is followed by a second block 77, which has a larger current level and consists of six current pulses 40. After a further pause, four current pulses 40 follow in the reverse direction, i.e. with changed polarity.
  • the sequence can be repeated several times.
  • the individual pulse times t 0 n are preferably on the order of about 1 to 10 milliseconds.
  • the time duration of block 77 is of the order of up to 10 seconds, so that up to 500 pulses are transmitted in a block 77.
  • the occupancy with a low potential is both during the pulse sequences and in the pause time optionally possible. An interruption of the electrodeposition, which can cause inhomogeneities, is thus avoided.
  • a block 77 is matched with its parameters to a component of an alloy which, for example, is to be deposited in order to achieve the best deposition of this component. These can be determined in individual experiments. For example, the duration of the individual blocks 77 allows the proportion of the constituents of the alloy in the layer to be applied to be determined, for example in order to generate gradients in the layer. This is done by lengthening or shortening the duration of the block 77, which is optimally matched to a component of the alloy.
  • FIG. 5 shows an expanded material separation 4.
  • the material separation 4 is expanded before the filling. This can be done by drilling, eroding, or other methods, for example to increase the diameter.
  • the dashed line shows the material separation 4 before the expansion.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

L'invention concerne un procédé et un dispositif permettant de remplir les interruptions de matériau d'une surface. Selon l'état de la technique des procédés utilisés pour remplir les interruptions de matériau, le substrat subit souvent des températures élevées de processus et des effets négatifs de matières d'apport de nature différente. Pour y remédier, le procédé selon l'invention est effectué à de basses températures et permet un remplissage complet de l'interruption de matériau (4) sans matière de nature différente.
EP03767467A 2002-12-18 2003-12-01 Procede et dispositif permettant de remplir des interruptions de materiau d'une surface Withdrawn EP1573092A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10259361 2002-12-18
DE10259361A DE10259361A1 (de) 2002-12-18 2002-12-18 Verfahren und Vorrichtung zum Auffüllen von Materialtrennungen an einer Oberfläche
PCT/DE2003/003954 WO2004057062A2 (fr) 2002-12-18 2003-12-01 Procede et dispositif permettant de remplir des interruptions de materiau d'une surface

Publications (1)

Publication Number Publication Date
EP1573092A2 true EP1573092A2 (fr) 2005-09-14

Family

ID=32477770

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03767467A Withdrawn EP1573092A2 (fr) 2002-12-18 2003-12-01 Procede et dispositif permettant de remplir des interruptions de materiau d'une surface

Country Status (5)

Country Link
US (1) US7544282B2 (fr)
EP (1) EP1573092A2 (fr)
CN (1) CN1729313A (fr)
DE (1) DE10259361A1 (fr)
WO (1) WO2004057062A2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060219758A1 (en) * 2005-03-29 2006-10-05 Siemens Westinghouse Power Corporation Welding of gamma'-strengthened superalloys

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6072313A (en) * 1995-04-10 2000-06-06 International Business Machines Corporation In-situ monitoring and control of conductive films by detecting changes in induced eddy currents

Family Cites Families (15)

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GB566776A (en) * 1943-06-09 1945-01-12 Maurice Stuart Lane Improvements in or relating to electroplating
GB1521130A (en) * 1975-12-02 1978-08-16 Standard Telephones Cables Ltd Selective electro-plating etching or electro-machining
NL8105150A (nl) * 1981-11-13 1983-06-01 Veco Beheer Bv Werkwijze voor het vervaardigen van zeefmateriaal, verkregen zeefmateriaal, alsmede inrichting voor het uitvoeren van de werkwijze.
DE3627779A1 (de) * 1986-08-16 1988-02-18 Bbc Brown Boveri & Cie Erneuertes turbinenbauteil
DE3815976A1 (de) * 1988-05-10 1989-11-23 Mtu Muenchen Gmbh Verfahren zur erzeugung galvanisch abgeschiedener heissgaskorrosionsschichten
US5158653A (en) * 1988-09-26 1992-10-27 Lashmore David S Method for production of predetermined concentration graded alloys
JPH02170997A (ja) * 1988-12-22 1990-07-02 Honda Motor Co Ltd Ｆｅ―Ｚｎ系合金めっき鋼板の補修方法
JPH02197393A (ja) * 1989-01-24 1990-08-03 Mitsubishi Cable Ind Ltd アルミニウム溶接管の溶接欠陥部の補修方法
DE4111174A1 (de) * 1991-04-06 1992-10-08 Leipzig Galvanotechnik Verfahren zur erhoehung der stromdichte bei der elektrochemischen oberflaechenbehandlung von insbesondere strangfoermigen, endlosen, ferromagnetischen werkstuecken
FR2704678B1 (fr) * 1993-04-29 1995-08-11 Framatome Sa Procede et dispositif de reparation et de protection contre la fissuration de la paroi interne d'un tube de traversee du fond de la cuve d'un reacteur nucleaire a eau sous pression.
FR2731498B1 (fr) * 1995-03-08 1997-06-06 Framatome Sa Procede de reparation par chemisage electrolytique d'un tube tel qu'un tube de generateur de vapeur
DE19548198C2 (de) * 1995-12-22 1999-05-12 Hueck Engraving Gmbh Verfahren und Vorrichtung zur Nach- und/oder Ausbesserung von kleinen Oberflächenschäden in einer großformatigen Preßplatte oder einem Endlosband aus Blech mit einer strukturierten Oberfläche zur Oberflächenprägung kunststoffbeschichteter Holzwerkstoff- oder Laminatplatten
JP2958751B2 (ja) * 1996-07-03 1999-10-06 本田技研工業株式会社 電気防食法
EP1241473A1 (fr) * 2001-03-16 2002-09-18 Siemens Aktiengesellschaft Méthode pour teste non-destructif des alliages contenant de carbide et de production des aubes de turbine à gaz
FR2827311B1 (fr) * 2001-07-12 2003-09-19 Snecma Moteurs Procede de reparation locale de pieces revetues d'une barriere thermique

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6072313A (en) * 1995-04-10 2000-06-06 International Business Machines Corporation In-situ monitoring and control of conductive films by detecting changes in induced eddy currents

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2004057062A3 *

Also Published As

Publication number Publication date
US7544282B2 (en) 2009-06-09
CN1729313A (zh) 2006-02-01
WO2004057062A2 (fr) 2004-07-08
WO2004057062A3 (fr) 2005-03-17
US20060070882A1 (en) 2006-04-06
DE10259361A1 (de) 2004-07-08

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