EP2859133B1 - Procédé de projection par gaz froid avec un gaz porteur - Google Patents

Procédé de projection par gaz froid avec un gaz porteur Download PDF

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Publication number
EP2859133B1
EP2859133B1 EP13735004.7A EP13735004A EP2859133B1 EP 2859133 B1 EP2859133 B1 EP 2859133B1 EP 13735004 A EP13735004 A EP 13735004A EP 2859133 B1 EP2859133 B1 EP 2859133B1
Authority
EP
European Patent Office
Prior art keywords
gas
cold
carrier gas
carrier
hydrogen
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.)
Not-in-force
Application number
EP13735004.7A
Other languages
German (de)
English (en)
Other versions
EP2859133A1 (fr
Inventor
Oliver Stier
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
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Siemens AG
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Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP2859133A1 publication Critical patent/EP2859133A1/fr
Application granted granted Critical
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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
    • 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

Definitions

  • the invention relates to a method for cold gas spraying in which particles are accelerated with a carrier gas in a convergent-divergent nozzle directed onto a substrate to be coated and remain adhered to a substrate.
  • Cold gas spraying is a process known per se, in which particles intended for coating are preferably accelerated to supersonic speed by means of a convergent-divergent nozzle, so that they adhere to the surface to be coated on account of their impressed kinetic energy.
  • the kinetic energy of the particles is used, which leads to a plastic deformation of the same, wherein the coating particles are melted on impact only on their surface. Therefore, this method is referred to as cold gas spraying in comparison with other thermal spraying methods, because it is carried out at comparatively low temperatures at which the coating particles remain substantially fixed.
  • a cold gas spraying system which has a gas heater for heating a gas.
  • a stagnation chamber is connected, which is connected on the output side with the convergent-divergent nozzle, preferably a Laval nozzle.
  • Convergent-divergent nozzles have a converging section and a flared section connected by a nozzle throat.
  • the convergent-divergent nozzle produces on the output side a powder jet in the form of a gas stream with particles therein at high speed, preferably supersonic speed.
  • the cold gas jet is generated in the cold gas spraying with a carrier gas, which in the front of the convergent-divergent Nozzle lying stagnation chamber under high pressure (the stagnation pressure) is.
  • the carrier gas is expanded and accelerated by the nozzle and thus forms the cold gas jet. This also contains the particles intended for coating.
  • As the carrier gas different gases are used.
  • Helium or helium mixtures are necessary in any case according to the prior art, if gas velocities of more than 1400 m / s to be achieved.
  • hydrogen can also be used as gas, which has even more favorable gas-dynamic properties.
  • hydrogen gas is an explosive substance and must therefore be handled with particular care.
  • carrier gases can be used for the cold gas spraying of particles.
  • the proposed carrier gases are hydrogen and nitrogen or mixtures of these two carrier gases.
  • a mixing ratio of less than 5 mol% of hydrogen to helium should be selected in order to counteract an explosion tendency of the carrier gas.
  • the object of the invention is to provide a carrier gas for cold gas spraying, which is economical to use and yet technically enables gas velocities of more than 1400 m / s.
  • This object is achieved according to the invention with the method given above, that is used as a carrier gas forming gas 95/5 with a nitrogen content of 95 mol% and a hydrogen content of 5 mol%.
  • This is a commercial product, which is offered by the company Linde AG.
  • the small proportion of 5 mol% hydrogen has the advantage that the ignition limit for hydrogen-nitrogen mixtures of about 5.7 mol% is exceeded and therefore the forming gas can be safely processed.
  • the gas mixture also does not separate, so that during processing no concentration of hydrogen can take place. Additional safety measures beyond those of ordinary cold gas spraying are therefore advantageously not necessary.
  • gas forming velocities of more than 1400 m / s can be achieved with forming gas.
  • the proportion of hydrogen should be as high as possible, and this must not exceed 5.7 mol%, taking into account tolerances, to ensure the processing safety.
  • forming gas in the stagnation chamber of the cold spray system is heated to 1000 ° C. stagnation temperature and released from a stagnation pressure of 50 bar against atmospheric pressure in the stagnation chamber, flow velocities of approximately 1460 m / s can be achieved.
  • nitrogen nitrogen limit of 1400 m / s forming gas is advantageous in relation to nitrogen only marginally more expensive and thus the high costs associated with the use of helium as a carrier gas can be advantageously avoided.
  • the forming gas 95/5 is fed to a plant used for cold gas spraying as a mixture.
  • this has the advantage that the mixing ratio can be adjusted with comparatively high accuracy by gas suppliers and can already be stored as a mixture in a designated memory in the vicinity of the system.
  • the forming gas 95/5 is also used as a powder conveying gas for feeding the particles into the carrier gas stream.
  • the particles to be processed are in fact supplied to the cold spray system in that they are conveyed in a gas. In this they can be finely dispersed, so that clumping is counteracted.
  • the powder conveying gas can be present at a pressure with which the back pressure of the carrier gas at the feed point can be overcome. If the powder conveying gas also consists of forming gas, the carrier gas of the carrier gas stream is not changed by feeding the particles together with the powder conveying gas in its desired concentration. This has the advantage that the cold gas jet when leaving the convergent-divergent nozzle still has the optimum composition already explained above.
  • the process is operated at a stagnation temperature of 800 ° to 1200 ° C., preferably 1000 ° C., and a stagnation pressure of 30 to 60 bar, preferably 50 bar.
  • a stagnation temperature 800 ° to 1200 ° C., preferably 1000 ° C.
  • a stagnation pressure 30 to 60 bar, preferably 50 bar.
  • FIG. 1 a plant 11 is used, which is suitable for cold gas spraying.
  • the core of this system 11 is a convergent-divergent nozzle 12, wherein in FIG. 1 a convergent part 13 and a divergent part 14 can be seen, which are connected by a nozzle neck 15, the narrowest point in the nozzle 12 with each other.
  • a stagnation chamber 16 Before the convergent part 13 is a stagnation chamber 16, in which the carrier gas is under high pressure and flows relatively slowly.
  • the carrier gas leaves the nozzle 12 in the form of a cold gas jet 17 in the direction of a substrate 18, wherein the particles not shown in detail in the cold gas jet 17 adhere to the substrate 18 and form a layer 19.
  • the substrate 18 is moved in the direction of the indicated arrow 20 for the purpose of forming a layer.
  • the carrier gas originates from a pressure vessel 21 for the forming gas 95/5.
  • a first line 22 the carrier gas passes through a first compressor 23 in the stagnation chamber 16, wherein this is preheated on the way with a heater 24.
  • two pressure vessels 21a and 21b are used. There is nitrogen in one, hydrogen in the other. Via a suitable mixing device 28, these two gases are mixed via throttle valves 29 and leave the mixing device 28 as a finished forming gas.
  • the outlet 30 of the mixing device may optionally be connected to the first line 22 and / or the second line 25 of the cold spraying installation 11 according to FIG FIG. 1 be connected.

Landscapes

  • 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)

Claims (3)

  1. Procédé de projection par gaz froid, dans lequel on accélère des particules avec un gaz porteur dans une buse convergente-divergente dirigée sur un substrat à revêtir et on les laisse adhérer à un substrat (18),
    caractérisé en ce qu'
    on utilise comme gaz porteur du gaz de formage 95/5 ayant une proportion d'azote de 95% en mole et une proportion d'hydrogène de 5% en mole, le gaz de formage 95/5 étant ajouté sous la forme d'un mélange à une installation (11) utilisée pour la projection par gaz froid.
  2. Procédé suivant la revendication 1,
    caractérisé en ce que
    l'on utilise le gaz de formage 95/5 également sous la forme d'un gaz de transport de poudre pour injecter les particules dans le courant de gaz porteur.
  3. Procédé suivant l'une des revendications précédentes,
    caractérisé en ce que
    l'on effectue le procédé à une température de stagnation de 800 à 1200°C, de préférence de 1000°C, et sous une pression de stagnation de 30 à 60 bar, de préférence de 50 bar.
EP13735004.7A 2012-07-19 2013-07-04 Procédé de projection par gaz froid avec un gaz porteur Not-in-force EP2859133B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012212682.1A DE102012212682A1 (de) 2012-07-19 2012-07-19 Verfahren zum Kaltgasspritzen mit einem Trägergas
PCT/EP2013/064156 WO2014012797A1 (fr) 2012-07-19 2013-07-04 Procédé de projection par gaz froid avec un gaz porteur

Publications (2)

Publication Number Publication Date
EP2859133A1 EP2859133A1 (fr) 2015-04-15
EP2859133B1 true EP2859133B1 (fr) 2018-01-03

Family

ID=48771423

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13735004.7A Not-in-force EP2859133B1 (fr) 2012-07-19 2013-07-04 Procédé de projection par gaz froid avec un gaz porteur

Country Status (3)

Country Link
EP (1) EP2859133B1 (fr)
DE (1) DE102012212682A1 (fr)
WO (1) WO2014012797A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
PL243972B1 (pl) * 2020-10-01 2023-11-13 Siec Badawcza Lukasiewicz Inst Obrobki Plastycznej Sposób niskociśnieniowego natryskiwania na zimno powłok z proszków cząstek stałych i układ do niskociśnieniowego natryskiwania na zimno powłok z proszków cząstek stałych

Family Cites Families (16)

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Publication number Priority date Publication date Assignee Title
US3637320A (en) * 1968-12-31 1972-01-25 Texas Instruments Inc Coating for assembly of parts
EP0484533B1 (fr) 1990-05-19 1995-01-25 Anatoly Nikiforovich Papyrin Procede et dispositif de revetement
DE19747386A1 (de) * 1997-10-27 1999-04-29 Linde Ag Verfahren zum thermischen Beschichten von Substratwerkstoffen
US6364932B1 (en) 2000-05-02 2002-04-02 The Boc Group, Inc. Cold gas-dynamic spraying process
DE10224780A1 (de) 2002-06-04 2003-12-18 Linde Ag Verfahren und Vorrichtung zum Kaltgasspritzen
DE10224777A1 (de) * 2002-06-04 2003-12-18 Linde Ag Verfahren und Vorrichtung zum Kaltgasspritzen
US6759085B2 (en) 2002-06-17 2004-07-06 Sulzer Metco (Us) Inc. Method and apparatus for low pressure cold spraying
US7128948B2 (en) * 2003-10-20 2006-10-31 The Boeing Company Sprayed preforms for forming structural members
US7553385B2 (en) 2004-11-23 2009-06-30 United Technologies Corporation Cold gas dynamic spraying of high strength copper
CA2571099C (fr) * 2005-12-21 2015-05-05 Sulzer Metco (Us) Inc. Methode et appareil hybrides de pulverisation a froid avec plasma
CN100547112C (zh) * 2006-04-30 2009-10-07 宝山钢铁股份有限公司 不锈钢包覆碳钢的复合钢板的制造方法
BRPI0718237A2 (pt) 2006-11-07 2013-11-12 Starck H C Gmbh Método para revestir uma superfície de substrato e produto revestido
US20110303535A1 (en) 2007-05-04 2011-12-15 Miller Steven A Sputtering targets and methods of forming the same
US20100143700A1 (en) 2008-12-08 2010-06-10 Victor K Champagne Cold spray impact deposition system and coating process
DE102010005375A1 (de) * 2010-01-22 2011-07-28 MTU Aero Engines GmbH, 80995 Vorrichtung und Verfahren zum Pulverspritzen mit erhöhter Gasstromgeschwindigkeit
EP2531632A2 (fr) * 2010-02-01 2012-12-12 Crucible Intellectual Property, LLC Poudre et revêtement à base de nickel pour projection thermique et leur procédé de fabrication

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
WO2014012797A1 (fr) 2014-01-23
DE102012212682A1 (de) 2014-01-23
EP2859133A1 (fr) 2015-04-15

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