EP2006409A2 - Procédé et dispositif de détermination de la partie d'au moins un additif d'une poudre à plusieurs composants destinée à la pulvérisation thermique - Google Patents

Procédé et dispositif de détermination de la partie d'au moins un additif d'une poudre à plusieurs composants destinée à la pulvérisation thermique Download PDF

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Publication number
EP2006409A2
EP2006409A2 EP08005536A EP08005536A EP2006409A2 EP 2006409 A2 EP2006409 A2 EP 2006409A2 EP 08005536 A EP08005536 A EP 08005536A EP 08005536 A EP08005536 A EP 08005536A EP 2006409 A2 EP2006409 A2 EP 2006409A2
Authority
EP
European Patent Office
Prior art keywords
additive
detection
thermal spraying
fluorescence
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.)
Granted
Application number
EP08005536A
Other languages
German (de)
English (en)
Other versions
EP2006409A3 (fr
EP2006409B1 (fr
Inventor
Manuel Hertter
Andreas Jakimov
Stefan Kick
Wolfgang Wachter
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 EP2006409A2 publication Critical patent/EP2006409A2/fr
Publication of EP2006409A3 publication Critical patent/EP2006409A3/fr
Application granted granted Critical
Publication of EP2006409B1 publication Critical patent/EP2006409B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
    • 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
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/18—After-treatment

Definitions

  • the invention relates to a method and a device for determining the proportion of at least one additive of a multicomponent powder for thermal spraying.
  • thermal spraying is a coating method in which a thermally active coating material is sprayed or sprayed onto a surface of a workpiece to be coated. Since almost all meltable coating materials can be used, coatings with different properties or functions such as thermal insulation, corrosion protection or wear protection can be realized by thermal spraying. In thermal spraying, there are virtually unlimited possible combinations between the material of the article or workpiece to be coated and the thermally active coating material to be used for the coating.
  • thermal spraying methods namely, for example, plasma spraying, arc spraying, flame spraying or else high-speed flame spraying.
  • Cold kinetic compaction is also a thermal spraying process.
  • the selection of the corresponding thermal spraying method depends, for example, on the coating material, the desired properties of the coating and on the respective costs.
  • a porous coating on the workpiece to be coated it is already known, in addition to the actual Coating material to apply a aggregate material by thermal spraying on the workpiece to be coated, wherein the aggregate is decomposed or dissolved after the thermal spraying process, so as to provide the porous coating.
  • the decomposing aggregate leaves pores in the coating.
  • the decomposition of the aggregate material is carried out in particular by a heat treatment of the coated workpiece. If no porosity is desired, the aggregate material can also remain in the layer and affect the properties of the layer, provided that it does not have a detrimental effect.
  • a method for thermal spraying in which a filler material with fluorescent marker material is sprayed onto a workpiece.
  • the spraying process is monitored online.
  • at least the particles of the fluorescent marker material contained in the hot gas jet are detected and evaluated online.
  • the invention is therefore based on the object to avoid the disadvantages of the known solutions of the prior art and to provide an improved process-safe solution for on-lineificatkoritrolle thermal spraying, with which a selective detection of fluorescent additives is ensured.
  • a significant advantage of the method according to the invention is that no over-radiation of the usually weak fluorescence occurs, as is the case in the measurement in the hot gas or plasma jet according to the prior art.
  • the detection of the intrinsic fluorescence of materials or of the fluorescence markers on or in materials can thus be carried out without difficulty in the powder injection beam by means of optical emission spectroscopy.
  • the powder injection jet is defined as the powder jet immediately after exiting the powder delivery tube of the spray device but before entering the hot gas jet of the burner.
  • the illumination is effected by means of a coherent light source, preferably a laser light source.
  • a coherent light source preferably a laser light source.
  • a further advantageous development of the method provides that the additive has autofluorescence. This depends on the type of aggregate.
  • An alternative embodiment of the method provides that the aggregate is provided in advance with fluorescent markers.
  • different methods such as the diffusion of rhodamine 6G in polyester powder, possible.
  • Yet another advantageous development of the method provides that the detection of the fluorescence of the additive takes place with a detection optics.
  • a detection optics for example, a conventional lens optics with analog / digital converter can be provided.
  • it can also be provided as a fiber optic cable detection optics, which is particularly inexpensive and robust.
  • the additive is polyester.
  • Other additives may be boron nitride or bentonide depending on the desired effect thereof.
  • a method for online process control in thermal spraying wherein a method for determining the proportion of at least one additive of a multi-component powder is used.
  • the online Process control includes the acquisition of various parameters and the comparison of the actual and target values.
  • “online process control” is to be understood as meaning a real-time evaluation and, if applicable, countermeasure against deviations from the nominal values.
  • the method for determining the proportion of at least one additive of a multicomponent powder serves as feedback of a closed loop.
  • a device according to the invention for the selective detection of an additive during thermal spraying is characterized in that a detection device for detecting the fluorescence of the additive is provided between a powder tube of the spraying device and a hot gas jet of a burner of the spraying device. It is sufficient if the illumination source and the detection optics are arranged in the immediate vicinity of the powder injection beam, while the spectrometer can be arranged further away.
  • the detection device has a preferably coherent illumination source and a detection optics connected to a spectrometer.
  • the detection optics can be designed as a fiber optic cable. This is particularly robust and inexpensive.
  • a spray device 1 for thermal spraying has a burner 2, which generates a hot gas jet 7 during operation.
  • the hot gas jet 7 are supplied from a powder tube 3 by means of a powder injection jet 6 spraying and aggregates.
  • the coating materials and the additives, such as polyester in this case, are injected into the hot gas jet 7 with the aid of a carrier gas.
  • the powder injection jet 6 extending from the top to the bottom in the plane of the drawing is deflected by the hot gas jet 7 into a substantially horizontally extending spray jet.
  • the coating and aggregates are accelerated by the hot gas jet 7 to a high speed and so applied or sprayed onto a substrate 4 to be processed.
  • the coating and aggregates collide with high thermal and kinetic energy on the substrate 4 and form a coating there.
  • the desired properties of the coating are formed.
  • a detection device 5 is provided, which is arranged in the amount of the powder injection jet 6, ie before the entry of the particle beam into the hot gas jet 7.
  • the detection device 5 has, as out FIG. 2 shows, designed as a laser light source 9 illumination source, which excites the fluorescent particles in the powder injection beam 6 to the beam.
  • an optical fiber cable 10 as an optical detection means for Detecting the fluorescence radiation directed to the powder injection beam 6.
  • the optical fiber cable 10 is connected to a spectrometer 11, which is suitable for emission spectroscopy.
  • polyester is provided as an additive.
  • the additive is labeled with rhodamine 6G as a fluorescent marker and emitted after excitation by the laser light source 9 light with a fluorescence emission maximum of about 560 nm.
  • Rhodamine 6G gives light energy within a few nanoseconds almost completely and produces a slightly red-shifted fluorescence light.
  • suitable bandpass filters may be used for suppression of Rayleigh elastic scattering, inelastic Raman scattering, and autofluorescence such as impurities.
  • the online process control then takes place in a (not shown) computing and control unit, which evaluates the actual data of the spectrometer and compares with the setpoint values.
  • a (not shown) computing and control unit which evaluates the actual data of the spectrometer and compares with the setpoint values.
  • the quantitative evaluation of the proportion of the additive in the powder injection jet can then be decided in real time that more or less additive is added to the multicomponent powder.

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  • 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)
  • Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
EP20080005536 2007-04-04 2008-03-25 Procédé et dispositif de détermination de la partie d'au moins un additif d'une poudre à plusieurs composants destinée à la pulvérisation thermique Not-in-force EP2006409B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200710016243 DE102007016243A1 (de) 2007-04-04 2007-04-04 Verfahren und Vorrichtung zum Ermitteln des Anteils zumindest eines Zuschlagstoffes eines Multikomponentenpulvers zum thermischen Spritzen

Publications (3)

Publication Number Publication Date
EP2006409A2 true EP2006409A2 (fr) 2008-12-24
EP2006409A3 EP2006409A3 (fr) 2011-05-04
EP2006409B1 EP2006409B1 (fr) 2012-08-01

Family

ID=39512768

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20080005536 Not-in-force EP2006409B1 (fr) 2007-04-04 2008-03-25 Procédé et dispositif de détermination de la partie d'au moins un additif d'une poudre à plusieurs composants destinée à la pulvérisation thermique

Country Status (2)

Country Link
EP (1) EP2006409B1 (fr)
DE (1) DE102007016243A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012103498A1 (de) * 2012-04-20 2013-10-24 Reinhausen Plasma Gmbh Vorrichtung und Verfahren zum Kennzeichnen eines Substrats sowie Kennzeichnung hierfür
DE102012021265A1 (de) * 2012-10-29 2014-04-30 Kennametal Inc. Verfahren und Vorrichtung zur berührungslosen und verschleißfreien Überwachung von Schweiß- und Spritzprozessen

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4327120A (en) * 1981-01-28 1982-04-27 General Electric Company Method for coating a metal substrate
GB9204064D0 (en) * 1992-02-26 1992-04-08 British Petroleum Co Plc Method of identifying polymer materials
FR2754062B1 (fr) * 1996-10-02 1998-12-04 Naudi Alain Dispositif pour analyser une matiere pulverulente circulant dans un conduit
US6734965B2 (en) * 2000-09-18 2004-05-11 Douglas G. Talley Optical patternation method
GB2377998B (en) * 2001-07-24 2003-06-25 Oxford Lasers Ltd Imaging device
JP3716222B2 (ja) * 2002-03-19 2005-11-16 三菱重工業株式会社 燃料比計測装置及び方法
JP3790504B2 (ja) * 2002-08-09 2006-06-28 三菱重工業株式会社 微粉炭燃焼システム
DE102004059549A1 (de) * 2004-12-10 2006-06-22 Mtu Aero Engines Gmbh Verfahren zur Beschichtung eines Werkstücks

Also Published As

Publication number Publication date
DE102007016243A1 (de) 2008-10-30
EP2006409A3 (fr) 2011-05-04
EP2006409B1 (fr) 2012-08-01

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