EP2714963B1 - Procédé d'injection de gaz froid présentant une meilleure adhérence et une porosité de couche réduite - Google Patents

Procédé d'injection de gaz froid présentant une meilleure adhérence et une porosité de couche réduite Download PDF

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Publication number
EP2714963B1
EP2714963B1 EP12724870.6A EP12724870A EP2714963B1 EP 2714963 B1 EP2714963 B1 EP 2714963B1 EP 12724870 A EP12724870 A EP 12724870A EP 2714963 B1 EP2714963 B1 EP 2714963B1
Authority
EP
European Patent Office
Prior art keywords
component
coating
cold gas
deposition
heat treatment
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
EP12724870.6A
Other languages
German (de)
English (en)
Other versions
EP2714963A1 (fr
Inventor
André Werner
Manuel Hertter
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 EP2714963A1 publication Critical patent/EP2714963A1/fr
Application granted granted Critical
Publication of EP2714963B1 publication Critical patent/EP2714963B1/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
    • 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 present invention relates to a method for coating a component, in which the coating material in powder form is applied to the component to be coated by means of cold gas spraying.
  • powder particles are accelerated at high speed in the direction of a component on which the powder is to be deposited as a layer. Due to the high speed at which the powder particles are moved by means of a carrier gas in the direction of the component to be coated, the kinetic energy is converted into deformation energy upon impact with the component and the powder particles and / or the component surface are so strongly deformed. that the materials flow into each other, so that a mutual connection results.
  • the advantage of the kinetic cold gas spraying is that no additional effort for the melting of the powder particles or heating of the powder particles as in plasma spraying or flame spraying is required.
  • the powder particles are in cold gas spraying in temperature ranges in which they do not or only slightly with the environment, so that no action must be taken to prevent the powder particles, for example, oxidize.
  • the fluidity of the powder particles is limited by the relatively low working temperature below the melting point of the coating material and it is thus possible for pores to form in the coating.
  • the adhesive strength may be affected accordingly.
  • the cold gas spraying process should continue to be easy to carry out.
  • a method for coating a component in which the coating material is applied in powder form by means of cold gas spraying onto the component to be coated, wherein the surface of the component is roughened before the deposition of the coating material, the coating is deposited in layers and then a surface heat treatment is carried out, in which the deposited coating material is melted.
  • the surface heat treatment is carried out after each deposition of one layer or one or more times between the deposition of successive layer and near-surface regions of the component are also melted.
  • the core of the component is neither melted nor heated to a temperature range close to the surface temperature, but below 70% of the surface temperature.
  • the superficial melting of the deposited coating or of the transition region between the component and the coating improves the adhesive strength, since the materials which have flowed into one another mechanically now also flow into one another in molten form. Moreover, any existing porosity in the coating is eliminated because the gas trapped in the pores can escape from the molten coating and the adjacent material can flow into the respective cavities.
  • the core temperature of the component should be kept as low as possible in order to avoid undesirable microstructural changes.
  • the surface heat treatment may be carried out with melting of the coating after each deposition of a layer or between the deposition of successive layers as required.
  • a further improvement in the adhesive strength of the deposited coating can be achieved by roughening the component surface prior to deposition of the layer.
  • the surface heat treatment can be carried out by various suitable methods and devices, such as by heating by means of a gas burner, a laser or by induction heating. Other methods for heating only the surface or the coating and the boundary region between the component and the coating can be used.
  • the cold gas spraying device itself, with which the coating has been applied are used for surface heat treatment.
  • the corresponding carrier gas has to be heated more strongly than has been done, for example, during the deposition of the powder particles.
  • a further improvement in the adhesive strength of the deposited coating can also be achieved by preheating the component surface prior to deposition of the layer.
  • the inventive method can be used in particular for the deposition of solder materials on turbine components of gas turbines and aircraft engines.
  • the Fig. 1 shows a Kaltgasspritzvorraum 4, which has a gas supply 6, via which a carrier gas is supplied, which serves to transport the deposited powder particles 8 on the surface of the component 1
  • the carrier gas 6 is from a gas supply device (not shown) with high pressure and high speed in introduced the cold gas spraying device 4, where it via a nozzle assembly, for. B. a Laval nozzle 5, emerges at a very high speed and flows in the direction of the surface to be coated of the component 1 (spray jet 3).
  • the velocity of the carrier gas may be in the range of the speed of sound.
  • a powder feed 7 is also provided, via which a material to be coated can be supplied in the form of a powder so that it leaves the cold gas spraying device 4 via the Laval nozzle 5 with the carrier gas and can be deposited on the component.
  • the carrier gas can also be tempered accordingly, so that it can well be in the temperature range of up to several 100 ° C.
  • the temperature during cold gas spraying is not chosen so high that the coating material is melted by means of the carrier gas. Rather, the powder particles 8 meet in non-molten state on the surface of the component 1, wherein due to the high impact velocity of the particles 8 upon impingement preforming of the particles 8 and / or the component surface takes place, so that there is a flow into each other of the materials and / or a Welding of the materials comes.
  • a dense, well-adhering layer 2 can be formed on the component 1.
  • pores may remain in the layer, as shown schematically in FIG Fig. 2 is shown, in which the pores 9 in the coating 2 are shown purely schematically.
  • a surface heat treatment is carried out, in which the coating 2 is melted, so that a compression of the layer 2 and elimination of the porosity is effected.
  • the surface treatment for melting the layer 2 can be carried out by treatment with a gas burner, a laser or by inductive heating.
  • the heated carrier gas of the cold spraying device 4 it is also possible with the heated carrier gas of the cold spraying device 4 to cause the layer 2 to melt. For this purpose, only the temperature of the carrier gas must be increased accordingly.
  • the cold spray device 4 is then practically used as a hot air nozzle without the supply of powder particles.
  • the Fig. 3 shows the component 1 with the coating 2 after performing the surface heat treatment with melting of the coating 2 or of surface areas of the component 1 or the areas at the interface with the coating. 2
  • the combination according to the invention can combine advantages of layer deposition in the melt phase with advantages of kinetic cold gas spraying. Accordingly, the coating lacks corresponding reaction components which would be observed, for example, during thermal spraying.
  • a roughening of the component surface before application of the coating can additionally take place and / or preheating, wherein the rough surface and the subsequent melting of the coating 2 and / or the interface between component 1 and Coating 2 a particularly intense Into flow of materials occurs, which ensures a particularly good adhesion of the coating on the component 1.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)

Claims (4)

  1. Procédé de revêtement d'une pièce, dans lequel la substance de revêtement est appliquée sous forme pulvérulente (8) sur la pièce à revêtir (1) par injection de gaz froid,
    caractérisé en ce que :
    - la surface de la pièce (1) est décapée avant la précipitation de la substance de revêtement,
    - le revêtement (2) est précipité par couche,
    - on réalise ensuite un traitement de surface à la chaleur, dans lequel la substance de revêtement précipitée est fondue,
    dans lequel :
    - la traitement de surface à la chaleur est réalisé après chaque précipitation d'une couche ou une ou plusieurs fois entre la précipitation des couches successives,
    - des zones de la pièce (1) proches de la surface sont également fondues et
    - le noyau de la pièce (1) n'est ni fondu ni chauffé dans une plage de températures qui se rapproche de la température de surface, mais se situe en dessous de 70 % de la température de surface.
  2. Procédé selon la revendication 1,
    caractérisé en ce que :
    le traitement de surface à la chaleur se fait par le dispositif d'injection de gaz froid (4) lui-même par chauffage du gaz porteur, un brûleur à gaz, un laser ou un chauffage par induction.
  3. Procédé selon la revendication 1 ou 2,
    caractérisé en ce que :
    le noyau de la pièce (1) lors du traitement de surface à la chaleur se situe en dessous de 50 % de la température de surface.
  4. Procédé selon l'une quelconque des revendications précédentes,
    caractérisé en ce que :
    la surface de la pièce (1) est chauffée avant la précipitation des couches.
EP12724870.6A 2011-05-27 2012-05-10 Procédé d'injection de gaz froid présentant une meilleure adhérence et une porosité de couche réduite Not-in-force EP2714963B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011102602A DE102011102602A1 (de) 2011-05-27 2011-05-27 Kaltgasspritzverfahren mit verbesserter Haftung und verringerter Schichtporosität
PCT/DE2012/000490 WO2012163321A1 (fr) 2011-05-27 2012-05-10 Procédé d'injection de gaz froid présentant une meilleure adhérence et une porosité de couche réduite

Publications (2)

Publication Number Publication Date
EP2714963A1 EP2714963A1 (fr) 2014-04-09
EP2714963B1 true EP2714963B1 (fr) 2017-08-09

Family

ID=46201052

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12724870.6A Not-in-force EP2714963B1 (fr) 2011-05-27 2012-05-10 Procédé d'injection de gaz froid présentant une meilleure adhérence et une porosité de couche réduite

Country Status (3)

Country Link
EP (1) EP2714963B1 (fr)
DE (1) DE102011102602A1 (fr)
WO (1) WO2012163321A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111349932A (zh) * 2020-04-18 2020-06-30 南京中科煜宸激光技术有限公司 钢厂传输辊表面激光熔覆用高耐磨低摩擦系数合金涂层及其制备方法与系统

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012217617A1 (de) * 2012-09-27 2014-03-27 Siemens Aktiengesellschaft Bauteil mit einer Schicht sowie Verfahren zu dessen Herstellung
WO2017014002A1 (fr) 2015-07-23 2017-01-26 トーカロ株式会社 Procédé de fabrication d'un élément modifié en surface
CN108456879B (zh) * 2018-01-23 2020-05-19 华中科技大学 一种激光-辅助热源高效复合熔覆强化钢轨的方法

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US6258402B1 (en) * 1999-10-12 2001-07-10 Nakhleh Hussary Method for repairing spray-formed steel tooling
KR20050081252A (ko) * 2004-02-13 2005-08-18 고경현 다공성 금속 코팅 부재 및 저온 분사법을 이용한 그의제조 방법
US20050220995A1 (en) 2004-04-06 2005-10-06 Yiping Hu Cold gas-dynamic spraying of wear resistant alloys on turbine blades
FI120051B (fi) * 2004-06-03 2009-06-15 Luvata Oy Menetelmä metallipulverin liittämiseksi lämmönsiirtopintaan ja lämmönsiirtopinta
US20060093736A1 (en) 2004-10-29 2006-05-04 Derek Raybould Aluminum articles with wear-resistant coatings and methods for applying the coatings onto the articles
US20060163324A1 (en) * 2005-01-27 2006-07-27 Honeywell International, Inc. Method and system for spraying metallic powder on a component surface
SG141297A1 (en) * 2006-09-11 2008-04-28 United Technologies Corp Method for processing titanium alloy components
DE102007056454A1 (de) * 2007-11-23 2009-05-28 Mtu Aero Engines Gmbh Verfahren zum Beschichten von Bauteilen
US20100170937A1 (en) * 2009-01-07 2010-07-08 General Electric Company System and Method of Joining Metallic Parts Using Cold Spray Technique
DE102009036716A1 (de) * 2009-08-08 2010-03-25 Daimler Ag Beschichtungsverfahren

Non-Patent Citations (1)

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Title
None *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111349932A (zh) * 2020-04-18 2020-06-30 南京中科煜宸激光技术有限公司 钢厂传输辊表面激光熔覆用高耐磨低摩擦系数合金涂层及其制备方法与系统
CN111349932B (zh) * 2020-04-18 2021-07-27 南京中科煜宸激光技术有限公司 钢厂传输辊表面激光熔覆用高耐磨低摩擦系数合金涂层及其制备方法与系统

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Publication number Publication date
WO2012163321A1 (fr) 2012-12-06
DE102011102602A1 (de) 2012-11-29
EP2714963A1 (fr) 2014-04-09

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