EP1699943A1 - Procede de revetement partiel de surfaces de composants par thermo-injection - Google Patents

Procede de revetement partiel de surfaces de composants par thermo-injection

Info

Publication number
EP1699943A1
EP1699943A1 EP04789979A EP04789979A EP1699943A1 EP 1699943 A1 EP1699943 A1 EP 1699943A1 EP 04789979 A EP04789979 A EP 04789979A EP 04789979 A EP04789979 A EP 04789979A EP 1699943 A1 EP1699943 A1 EP 1699943A1
Authority
EP
European Patent Office
Prior art keywords
thermal spraying
suspension
coated
boron nitride
areas
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.)
Ceased
Application number
EP04789979A
Other languages
German (de)
English (en)
Inventor
Albin Platz
Gerhard Wyrda
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 Aero Engines 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 Aero Engines GmbH filed Critical MTU Aero Engines GmbH
Publication of EP1699943A1 publication Critical patent/EP1699943A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • C23C4/01—Selective coating, e.g. pattern coating, without pre-treatment of the material to be coated

Definitions

  • the invention relates to a method for the partial coating of component surfaces by means of thermal spraying, according to the kind defined in the preamble of claim 1.
  • a first and very simple possibility is to cover the areas that are not to be coated by means of adhesive masks, adhesive tape or the like.
  • Such covering has two serious disadvantages.
  • First of all, such materials or adhesive tapes can typically only be used up to approximately 200 degrees Celsius, since at higher temperatures there is a risk of impairment of the material, for example a burn through or the like.
  • adhesive materials frequently leave adhesive residues on removal, which necessitates a complex cleaning process and, if appropriate, the use of solvents, the use of which is not desirable for reasons of environmental protection.
  • a second possibility of covering partial areas that are not to be coated is to use a suitable covering device.
  • Such devices are relatively complex in terms of their design and construction, so that corresponding lead times and correspondingly high numbers of items are required if the devices are to be worthwhile.
  • the devices have the disadvantage that they either have to be cleaned very laboriously after a few coating processes, since the devices are coated just like the component to be coated.
  • the devices themselves can be coated with a suitable material, for example chrome-plated, in order to prevent the coating material from sticking. than to prevent from thermal spraying on the devices.
  • this procedure has the serious disadvantage that when the coating material is thermally sprayed on, particles of the coating material then bounce off the device and thereby reach the surface to be coated and the quality of the surface is significantly impaired.
  • a third possibility is to apply a mask made of a lacquer or a mixture containing a binder, such as, for example, based on an acrylic resin, or the like, as is described, for example, in US Pat. No. 4,464,430.
  • the disadvantage is the removal of the masking material, which is typically strongly adherent. Elaborate disposal measures must also be taken for the waste generated during the cleaning of the components, since both the solvents used and the waste generated must be disposed of as special waste.
  • US Pat. No. 3,904,789 also describes a masking technique in which subareas not to be alitated are covered with a metallic mask, for example made of copper or nickel, during the alitizing of a surface. After the alitation, the metallic mask is then removed from the surface by means of an aqueous solution, for example an acid, which is suitable for the particular metal.
  • an aqueous solution for example an acid, which is suitable for the particular metal.
  • the process is very complex and requires the use of highly polluting acids or the like. To remove the metallic mask, a comparatively long residence time in the aqueous solution is also necessary.
  • a slip casting layer made of oxide ceramic particles and a binder is provided as the first layer, and a metallic slip casting layer is provided as the second layer.
  • the object of the invention is a method for the partial coating of component surfaces according to the preamble of To create claim 1, which avoids these disadvantages and provides a simple, efficient, easy to use and environmentally friendly method.
  • a suspension containing boron nitride is very simple, inexpensive and efficient. Such a suspension is easy to produce, is very easy to use and its components are harmless with regard to an environmental hazard.
  • the bomitride-containing suspension also has the extremely favorable property that the suspension absorbs the particles of thermal spraying which are formed as overspray and thus ensures a controllable good surface quality of the coated surface of the soap.
  • the areas not to be coated are covered by means of a suspension containing boron nitride.
  • a bomitride-containing suspension suitable for this typically has a proportion of boron nitride, preferably in powder form, for example hexagonal boron nitride, in the order of approximately 10% by weight of the suspension.
  • the boron nitride is present in the suspension in finely divided form in water without the need for further constituents such as solvents or the like.
  • Such a suspension as covering material can be applied very simply and efficiently to the areas that are not to be coated, since it corresponds to the typical application procedure analogous to the area of painting technology is accessible. It can be applied, for example, with the help of brushes, application rollers, spray guns, spray cans or by dipping. An application using a screen printing process is also possible.
  • Typical layer thicknesses of the suspension used as the covering material or the more or less dry boron nitride layer resulting from it when drying are in the order of magnitude of 10 to 20 ⁇ m. Such a layer thickness is sufficient to reliably cover the partial areas that are not to be coated and to absorb the particles of thermal spraying that hit these partial areas as well as the overspray that arises.
  • the suspension or the more or less dry boron nitride layer resulting from it during drying can also prevent the overspray from ricocheting, which could then reach the area of the surface to be coated and could massively deteriorate the surface quality, since this absorbs the overspray.
  • the method described thus makes it possible, with very simple, inexpensive and efficient means, to effectively cover the partial areas not to be coated, in order to protect them from being coated during thermal spraying.
  • the overspray which can hardly be avoided during thermal spraying, is absorbed by the dried boron nitride layer, so that a significantly better surface quality of the component surface coated by means of thermal spraying can be achieved.
  • the boron nitride in the suspension used also has a very high temperature resistance. Temperatures of up to 1000 ° C can be expected of the boron nitride in air, as well as temperatures of up to 2000 C G when used in a protective gas atmosphere. The use is therefore with different methods for thermal fuel zen easily possible, whereby the parameters of the method for thermal spraying can be easily adapted to the coating material and to the material to be coated, since the covering material, especially in the case of - anyway widespread - thermal spraying with a protective gas envelope does not impose any appreciable limitation on the processing temperature ,
  • the suspension is ideally applied to the partial areas not to be coated and dried before thermal spraying.
  • the suspension or the more or less dry boron nitride layer that results from it when it dries up can be washed off very easily together with the particles taken up and overspray.
  • the aqueous suspension which essentially consists of water and boron nitride and is free of binders, this washing can be done very easily with water, without the use of solvents or the like. Since the suspension or the more or less dry boron nitride layer that arises when it dries out can be very easily dissolved in water, it is very easy to achieve a very good cleaning of the components.
  • the use of the suspension described also prevents adhesive binder residues or the like from remaining on the component.
  • a very simple and very efficient way of washing off the bomitride layer together with the particles and the overspray is to free the component from the covering material, the particles and the overspray after the thermal spraying by immersing it in water.
  • the coated component can thus be cleaned very easily, very quickly and very efficiently.
  • the ingredients of the suspension are environmentally friendly, the substances that collect and or settle in the water bath can easily be disposed of together with the water or after drying, without special measures, such as in the disposal of the prior art used materials, would require.
  • the described method can achieve a clear advantage in terms of efficiency and costs over the methods according to the prior art.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

L'invention concerne un procédé de revêtement partiel de surfaces de composants par thermo-injection, des zones ne devant pas être revêtues étant recouvertes. Selon l'invention, lesdites zones ne devant pas être revêtues sont recouvertes au moyen d'une suspension contenant du nitrure de bore lors de la thermo-injection.
EP04789979A 2003-11-03 2004-10-14 Procede de revetement partiel de surfaces de composants par thermo-injection Ceased EP1699943A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10351168A DE10351168A1 (de) 2003-11-03 2003-11-03 Verfahren zum teilweisen Beschichten von Bauteiloberflächen mittels thermischem Spritzen
PCT/DE2004/002275 WO2005045088A1 (fr) 2003-11-03 2004-10-14 Procede de revetement partiel de surfaces de composants par thermo-injection

Publications (1)

Publication Number Publication Date
EP1699943A1 true EP1699943A1 (fr) 2006-09-13

Family

ID=34530037

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04789979A Ceased EP1699943A1 (fr) 2003-11-03 2004-10-14 Procede de revetement partiel de surfaces de composants par thermo-injection

Country Status (3)

Country Link
EP (1) EP1699943A1 (fr)
DE (1) DE10351168A1 (fr)
WO (1) WO2005045088A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004058705B3 (de) * 2004-12-06 2006-08-17 Daimlerchrysler Ag Thermisches Beschichtungsverfahren und Einweg-Maskierung dafür
DE102008011249A1 (de) * 2008-02-26 2009-09-10 Maschinenfabrik Reinhausen Gmbh Verfahren zur Herstellung strukturierter Oberflächen
DE102008016041A1 (de) 2008-03-28 2009-01-02 Daimler Ag Vorrichtung
DE102008053394A1 (de) 2008-10-27 2010-04-29 Mtu Aero Engines Gmbh Vorrichtung zum partiellen Abdecken einer Bauteilzone
DE102010009616A1 (de) * 2010-02-27 2011-09-01 Mtu Aero Engines Gmbh Verfahren zur Herstellung oder Reparatur eines Bauteils und Abdeckbeschichtung
DE102014204117A1 (de) * 2014-03-06 2015-10-15 MTU Aero Engines AG Verfahren und Vorrichtung zum partiellen Abdecken eines Bauteilbereichs eines Bauteils

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2341633A1 (de) * 1973-08-17 1975-03-13 Degussa Verfahren zum partiellen schutz von metalloberflaechen bei der waermebehandlung, insbesondere bei kohlungs- und nitrierbehandlungen im salzbad
JPS63157850A (ja) * 1986-12-22 1988-06-30 Showa Denko Kk 溶射方法
TW349984B (en) * 1993-09-13 1999-01-11 Starck H C Gmbh Co Kg Pastes for the coating of substrates, methods for manufacturing them and their use
US20040191488A1 (en) * 2002-04-10 2004-09-30 Thomas Berndt Component, method for coating a component, and powder
EP1352988A1 (fr) * 2002-04-10 2003-10-15 Siemens Aktiengesellschaft Procédé de revêtement d'un objet

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005045088A1 *

Also Published As

Publication number Publication date
WO2005045088A1 (fr) 2005-05-19
DE10351168A1 (de) 2005-06-02

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