EP2014794A1 - Tuyère d'injection de gaz à froid - Google Patents

Tuyère d'injection de gaz à froid Download PDF

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Publication number
EP2014794A1
EP2014794A1 EP07022704A EP07022704A EP2014794A1 EP 2014794 A1 EP2014794 A1 EP 2014794A1 EP 07022704 A EP07022704 A EP 07022704A EP 07022704 A EP07022704 A EP 07022704A EP 2014794 A1 EP2014794 A1 EP 2014794A1
Authority
EP
European Patent Office
Prior art keywords
converging portion
cold gas
connecting element
converging
diameter
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Withdrawn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
EP07022704A
Other languages
German (de)
English (en)
Inventor
Peter Heinrich
Helmut Höll
Albert Kay
Werner Krömmer
Peter Richter
Tobias Schmidt
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.)
Linde GmbH
Original Assignee
Linde 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 Linde GmbH filed Critical Linde GmbH
Publication of EP2014794A1 publication Critical patent/EP2014794A1/fr
Withdrawn legal-status Critical Current

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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
    • C23C24/00—Coating starting from inorganic powder
    • C23C24/02—Coating starting from inorganic powder by application of pressure only
    • C23C24/04—Impact or kinetic deposition of particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/14—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
    • B05B7/1481—Spray pistols or apparatus for discharging particulate material

Definitions

  • the present invention relates to a cold gas spraying nozzle according to the preamble of claim 1.
  • Cold gas spraying is a coating process in which a powdered coating material is applied to a carrier material at very high speed.
  • the powder particles are injected into a gas jet of heated process gas, wherein the gas jet was previously accelerated to supersonic speed by expansion in a mostly laval-like shaped nozzle.
  • the injected spray particles are accelerated by injection into the gas jet to such a high speed that, in contrast to other thermal spray processes, they form a dense and firmly adhering layer upon impact with the substrate even without prior melting or melting.
  • Nozzles for cold gas spraying are produced from metal, from metal alloys, from light metal, for example from aluminum, or from hard material, for example from tungsten carbide. Both full nozzles and split nozzles, for example nozzles composed of two half-shells, can be used for cold gas spraying.
  • a cold gas spray nozzle in which the converging section is detachably connected to the non-converging section in the area of the smallest diameter describes the document JP 2005 095 886 A from the prior art.
  • Such a detachable connection offers, for example, the advantage that when the nozzle neck is worn, it is not necessary to replace the entire nozzle.
  • a non-convergent section may be used with any divergence angle.
  • a cold gas spray nozzle which has at least two parts in the flow direction, wherein the second part is easily replaceable.
  • these two parts may be formed of different materials, for example of metallic material, of ceramic and / or plastic.
  • a cold gas spraying nozzle according to the preamble of claim 1 is in the document EP 1 462 546 B1 (German translation: DE 60 2004 000 936 T2 ) disclosed in the prior art.
  • this cold gas spray nozzle at least the non-converging region of polybenzimidazole (PBI) is formed to prevent clogging of the nozzle when using low-melting powder particles.
  • PBI polybenzimidazole
  • Polybenzimidazole has the formula poly (2,2 '- (m-phenylene) -5,5'-bibenzimidazole) and is commercially available under the trade name Celazole. Polybenzimidazole is particularly suitable for use in a cold gas spray nozzle because of its very high temperature resistance. Thus, polybenzimidazole allows for continuous use temperatures in excess of about 310 degrees Celsius. Furthermore, polybenzimidazole has a high and above a wide temperature range almost constant mechanical strength.
  • polybenzimidazole can become a chipping challenge. So it is recommended to provide edging to avoid tearing of edges during cutting. Furthermore, in the part design, the relatively high notch sensitivity of polybenzimidazole must be taken into account, that is, corners must be rounded. In addition to the difficult processability, the relatively high price is another disadvantage of the thermoplastic polybenzimidazole.
  • polybenzimidazole poses specific requirements for storage.
  • precast parts machined to tight tolerances are to be stored in airtight bags provided with a desiccant in order to prevent dimensional changes due to absorption of moisture.
  • Moist parts that are quickly exposed to temperatures above 200 degrees Celsius during operation should first be dried before use to avoid deformation due to thermal shock.
  • the present invention has the object, a cold gas spray nozzle of the type mentioned in such a way that clogging of the cold gas spray nozzle is reliably prevented with spray particles and the cold gas spray nozzle yet easy and is inexpensive to produce.
  • the present invention is based on the fact that the cold gas spraying nozzle is made of at least one heat-resistant plastic, which is easily processable in comparison with polybenzimidazole, at least in that region in which the spray particles cake gently, in particular in the nozzle neck or in the narrowest cross-section of the nozzle.
  • the plastic from which the nozzle is formed at least in the region of its smallest diameter, a melting point of about about 250 degrees Celsius, for example, of about about 300 degrees Celsius, in particular of about about 400 degrees Celsius on.
  • Polyether ketones have high mechanical strength, stiffness and creep resistance over a wide temperature range; Nevertheless, polyether ketones are relatively easy to work, for example by machining. Another advantage of polyether ketones is their inherent flame retardancy and very little smoke in case of fire. Furthermore, polyether ketones have excellent wear resistance and good sliding properties. Caking of the spray particles is thus prevented in a reliable manner.
  • Polyimide can be used in a temperature range between absolute zero and be used in the short term to well above 400 degrees Celsius.
  • the thermal and electrical conductivity of polyimide is very low.
  • polyimide has a relatively low coefficient of thermal expansion and a good dimensional stability for a plastic, and thus enables the production of components with close tolerances.
  • Another advantage is the fact that the properties of polyimide, for example, by adding graphite or polytetrafluoroethylene (PTFE) can be selectively changed.
  • PTFE polytetrafluoroethylene
  • the heat-resistant plastic of the cold gas spraying nozzle according to the present invention can also be formed from polytetrafluoroethylene (PTFE).
  • PTFE polytetrafluoroethylene
  • Polytetrafluoroethylene colloquially also known under the trade name Teflon, is particularly advantageous because it has a very low coefficient of friction. There is almost no material adhering to polytetrafluoroethylene because the surface tension of polytetrafluoroethylene is extremely low. Caking of injected into the gas jet spray particles on the inner wall of the cold gas spray nozzle is prevented by a lining with polytetrafluoroethylene in a particularly reliable manner. Further, polytetrafluoroethylene has a very good workability.
  • the polytetrafluoroethylene has calcium fluoride, more particularly a content range of from about fifteen percent by weight calcium fluoride to about fifty percent by weight calcium fluoride, for example a content of about 25 percent by weight calcium fluoride or about forty percent by weight calcium fluoride.
  • the heat-resistant plastic may further be formed essentially of fiber-reinforced plastic, in particular of glass fiber reinforced and / or carbon fiber reinforced and / or carbon fiber reinforced plastic; this offers the advantage of less deformability.
  • Fiber-plastic composites generally have high specific strengths and stiffnesses.
  • the mechanical and thermal properties of fiber-plastic composites can be adjusted via a variety of parameters.
  • the fiber angle, the fiber volume ratio and / or the layer order can be varied and thus a particularly easy workability can be achieved.
  • the heat-resistant plastic may finally be formed essentially of MICA.
  • the smallest diameter of the convergent section of smallest diameter of the non-converging portion is smaller than the smallest diameter of the non-converging portion.
  • the diameter of the part of the connecting element facing the convergent section may differ from the diameter of the part of the convergent section facing the connecting element, in particular the diameter of the part of the connecting element facing the convergent section greater than the diameter of the part of the convergent section facing the connecting element be.
  • the diameter of the part of the connecting element facing the non-converging section may differ from the diameter of the part of the non-converging section facing the connecting element, in particular the diameter of the part of the connecting element facing the non-converging section is smaller than the diameter of the connecting element Be connecting member facing part of the non-converging section.
  • the present invention further relates to a cold gas spray gun with at least one cold gas spray nozzle according to the type set forth above.
  • a cold gas spraying nozzle 100 (with orifice 210, powder tube 220 and gas chamber 50) provided for accelerating gas and spray particles is shown, which in the region 10 of its smallest diameter from a direction converging in the flow direction S 20 in a flow direction S non-converging section 30 passes.
  • the cold gas spray nozzle 100 is formed in the region 10 of the smallest diameter of heat-resistant plastic.
  • the convergent section 20, the non-converging section 30 and / or at least one connecting element 40 it is thus possible for the convergent section 20, the non-converging section 30 and / or at least one connecting element 40 to differ in the material.
  • the part made of plastic advantageously begins in the region 10 of the thinnest cross-section of the nozzle, so that the region in which the gas expands, is made of plastic.
  • the first segment, ie the converging section 20 is formed of metal, of at least one metal alloy, of carbide, of oxide and / or of at least one hard material, can be operated at higher gas temperatures than with a cold gas spraying nozzle made entirely of plastic become.
  • the temperature of the gas fed into the cold gas spraying nozzle 100 'or 100 "" can be selected arbitrarily high, because at the narrowest cross section 10 of the nozzle 100' or 100 "", ie at the expansion location, the gas suddenly becomes cold. Even if the cold gas spray nozzle is fed with 600 degrees Celsius hot gas, the gas temperature at the point where the heat resistant plastic starts is less than 300 degrees Celsius.
  • the cold gas spraying nozzle 100 'or 100 "" can be supplied with gas having a temperature of over 310 degrees Celsius, in particular above 600 degrees Celsius, for example, of over about 1,500 degrees Celsius, has. In this way, higher gas velocities and thus also higher particle speeds can be achieved, which in turn leads to more efficiency and better layers.
  • the entire nozzle that is to say the convergent section 20, the non-converging section 30 and / or the connecting element 40, may also be formed from the heat-resistant plastic.
  • the nozzle can be built from two half shells or a full nozzle.
  • the non-converging portion 30 of the cold gas spraying nozzle may be diverging in the flow direction S. This helps to accelerate the gas.
  • non-converging portion 30 may also be hollow cylindrical or substantially hollow cylindrical, such as in the third embodiment of cold gas spray nozzle 100 ".
  • the convergent section 20 is releasably connected to the non-convergent section 30 in the region 10 of the smallest diameter. This is in Fig. 1 , in Fig. 2 and in Fig. 3 illustrated by a vertical dashed line.
  • Fig. 4A, Fig. 4B and Fig. 4C illustrated embodiment of the present invention differs the least Diameter of the converging portion 20 or the converging portion 20 facing portion 42 of the connecting member 40 of the smallest diameter of the non-converging portion 30 or the non-converging portion 30 facing portion 44 of the connecting element 40th
  • the smallest diameter of the converging portion 20 or the converging portion 20 facing portion 42 of the connecting member 40 is smaller than the smallest diameter of the non-converging portion 30 or the non-converging portion 30 facing portion 44 of the connecting element 40th

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Nozzles (AREA)
EP07022704A 2007-07-10 2007-11-22 Tuyère d'injection de gaz à froid Withdrawn EP2014794A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200710032021 DE102007032021A1 (de) 2007-07-10 2007-07-10 Kaltgasspritzdüse

Publications (1)

Publication Number Publication Date
EP2014794A1 true EP2014794A1 (fr) 2009-01-14

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EP07022704A Withdrawn EP2014794A1 (fr) 2007-07-10 2007-11-22 Tuyère d'injection de gaz à froid

Country Status (2)

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EP (1) EP2014794A1 (fr)
DE (1) DE102007032021A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2574408A1 (fr) * 2011-09-30 2013-04-03 Air Liquide Deutschland GmbH Procédé et dispositif destinés à la sortie d'un flux de liquide de refroidissement
EP2766124A4 (fr) * 2011-10-11 2015-06-10 Plasma Giken Co Ltd Pistolet de pulvérisation à froid
US11662300B2 (en) 2019-09-19 2023-05-30 Westinghouse Electric Company Llc Apparatus for performing in-situ adhesion test of cold spray deposits and method of employing
US11898986B2 (en) 2012-10-10 2024-02-13 Westinghouse Electric Company Llc Systems and methods for steam generator tube analysis for detection of tube degradation
US11935662B2 (en) 2019-07-02 2024-03-19 Westinghouse Electric Company Llc Elongate SiC fuel elements

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009052946A1 (de) 2009-11-12 2011-05-19 Mtu Aero Engines Gmbh Verfahren und Vorrichtung zur Bauteilbeschichtung

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0484533A1 (fr) 1990-05-19 1992-05-13 Anatoly Nikiforovich Papyrin Procede et dispositif de revetement
DE10015920A1 (de) 2000-03-30 2001-08-30 Xcellsis Gmbh Strömungskörper, Verfahren zu dessen Herstellung und Verwendung desselben
WO2003041868A2 (fr) 2001-05-29 2003-05-22 Linde Aktiengesellschaft Procede et dispositif de projection par gaz froid
DE10207525A1 (de) 2002-02-22 2003-09-04 Linde Ag Verfahren und Vorrichtung zum Kaltgasspritzen
DE10207519A1 (de) 2002-02-22 2003-09-11 Linde Ag Vorrichtung zum Kaltgasspritzen
WO2003080255A1 (fr) * 2002-03-22 2003-10-02 Javad Mostaghimi Tuyere pour pulverisation thermique d'enduits a faible teneur en oxyde
EP1369498A1 (fr) 2002-05-22 2003-12-10 Linde Aktiengesellschaft Procédé et appareil de dépôt par pulvérisation thermique à grand vitesse
EP1462546A2 (fr) * 2003-03-28 2004-09-29 United Technologies Corporation Buse pour pulverisation à froid fabriquer avec polybenzimidazole
EP1506816A1 (fr) 2003-04-30 2005-02-16 Linde Aktiengesellschaft Buse de Laval pour la pulvérisation thermique et cinétique
JP2005095886A (ja) 2003-09-02 2005-04-14 Nippon Steel Corp コールドスプレー用ノズル並びにコールドスプレー被膜及び製造方法
WO2006002258A2 (fr) * 2004-06-22 2006-01-05 Vladimir Belashchenko Appareil thermique de projection a grande vitesse
EP1629899A1 (fr) 2004-08-23 2006-03-01 Delphi Technologies, Inc. Insert remplaçable pour une buse de pulvérisation cinétique
WO2006034778A1 (fr) 2004-09-24 2006-04-06 Linde Aktiengesellschaft Procede de pulverisation par gaz froid et pistolet pulverisateur a gaz froid caracterises par un temps de sejour prolonge de la poudre dans le jet de gaz

Patent Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0484533A1 (fr) 1990-05-19 1992-05-13 Anatoly Nikiforovich Papyrin Procede et dispositif de revetement
DE10015920A1 (de) 2000-03-30 2001-08-30 Xcellsis Gmbh Strömungskörper, Verfahren zu dessen Herstellung und Verwendung desselben
WO2003041868A2 (fr) 2001-05-29 2003-05-22 Linde Aktiengesellschaft Procede et dispositif de projection par gaz froid
DE10207525A1 (de) 2002-02-22 2003-09-04 Linde Ag Verfahren und Vorrichtung zum Kaltgasspritzen
DE10207519A1 (de) 2002-02-22 2003-09-11 Linde Ag Vorrichtung zum Kaltgasspritzen
WO2003080255A1 (fr) * 2002-03-22 2003-10-02 Javad Mostaghimi Tuyere pour pulverisation thermique d'enduits a faible teneur en oxyde
EP1369498A1 (fr) 2002-05-22 2003-12-10 Linde Aktiengesellschaft Procédé et appareil de dépôt par pulvérisation thermique à grand vitesse
US20040018317A1 (en) * 2002-05-22 2004-01-29 Linde Aktiengesellschaft Process and device for high-speed flame spraying
EP1462546A2 (fr) * 2003-03-28 2004-09-29 United Technologies Corporation Buse pour pulverisation à froid fabriquer avec polybenzimidazole
EP1462546B1 (fr) 2003-03-28 2006-05-24 United Technologies Corporation Buse pour pulverisation à froid fabriquer avec polybenzimidazole
DE602004000936T2 (de) 2003-03-28 2006-10-26 United Technologies Corporation, Hartford Kaltgasspritzdüse gefertigt mit Polybenzimidazole
EP1506816A1 (fr) 2003-04-30 2005-02-16 Linde Aktiengesellschaft Buse de Laval pour la pulvérisation thermique et cinétique
JP2005095886A (ja) 2003-09-02 2005-04-14 Nippon Steel Corp コールドスプレー用ノズル並びにコールドスプレー被膜及び製造方法
WO2006002258A2 (fr) * 2004-06-22 2006-01-05 Vladimir Belashchenko Appareil thermique de projection a grande vitesse
EP1629899A1 (fr) 2004-08-23 2006-03-01 Delphi Technologies, Inc. Insert remplaçable pour une buse de pulvérisation cinétique
WO2006034778A1 (fr) 2004-09-24 2006-04-06 Linde Aktiengesellschaft Procede de pulverisation par gaz froid et pistolet pulverisateur a gaz froid caracterises par un temps de sejour prolonge de la poudre dans le jet de gaz

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
HANCHI J., EISS N.S.: "Dry sliding frcition and wear of short carbon-fiber-reinforced polyetherketone at elevated temperatures", WEAR, vol. 203-204, 1 March 1997 (1997-03-01), pages 380 - 386, XP002481219 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2574408A1 (fr) * 2011-09-30 2013-04-03 Air Liquide Deutschland GmbH Procédé et dispositif destinés à la sortie d'un flux de liquide de refroidissement
EP2766124A4 (fr) * 2011-10-11 2015-06-10 Plasma Giken Co Ltd Pistolet de pulvérisation à froid
US11898986B2 (en) 2012-10-10 2024-02-13 Westinghouse Electric Company Llc Systems and methods for steam generator tube analysis for detection of tube degradation
US11935662B2 (en) 2019-07-02 2024-03-19 Westinghouse Electric Company Llc Elongate SiC fuel elements
US11662300B2 (en) 2019-09-19 2023-05-30 Westinghouse Electric Company Llc Apparatus for performing in-situ adhesion test of cold spray deposits and method of employing

Also Published As

Publication number Publication date
DE102007032021A1 (de) 2009-01-15

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