EP2371994B1 - Beschichtungsverfahren einer Beschichtung aus rostfreiem Stahl auf einem Kupfersubstrat - Google Patents

Beschichtungsverfahren einer Beschichtung aus rostfreiem Stahl auf einem Kupfersubstrat Download PDF

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Publication number
EP2371994B1
EP2371994B1 EP11153762A EP11153762A EP2371994B1 EP 2371994 B1 EP2371994 B1 EP 2371994B1 EP 11153762 A EP11153762 A EP 11153762A EP 11153762 A EP11153762 A EP 11153762A EP 2371994 B1 EP2371994 B1 EP 2371994B1
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EP
European Patent Office
Prior art keywords
stainless steel
gas
coating
carrier gas
particles
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.)
Revoked
Application number
EP11153762A
Other languages
English (en)
French (fr)
Other versions
EP2371994A1 (de
Inventor
Michel Saez
Jean-Pierre Bernard
Alain Cloarec
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.)
Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Original Assignee
Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
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Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=42470681&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2371994(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Air Liquide SA, LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude filed Critical Air Liquide SA
Publication of EP2371994A1 publication Critical patent/EP2371994A1/de
Application granted granted Critical
Publication of EP2371994B1 publication Critical patent/EP2371994B1/de
Revoked 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0042—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for foodstuffs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/18—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by applying coatings, e.g. radiation-absorbing, radiation-reflecting; by surface treatment, e.g. polishing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • F28F21/081—Heat exchange elements made from metals or metal alloys
    • F28F21/085—Heat exchange elements made from metals or metal alloys from copper or copper alloys

Definitions

  • the present invention relates to a method for producing a thin coating of stainless steel on a copper matrix using a heated carrier gas to convey unmelted stainless steel particles.
  • Stainless steel is a metal recommended for food but with poor thermal conductivity.
  • copper has good thermal conductivity but its direct contact with food is not recommended.
  • the problem is to be able to achieve a coating of a thin layer of stainless steel on a copper matrix which leads to a good attachment of the stainless steel on the copper without causing a significant proportion of porosities and / or deformations of the matrix.
  • FR 2520265 teaches the deposition of a stainless steel coating on a substrate.
  • GB 2394479 describes the deposition of a copper layer on a stainless steel substrate.
  • the solution is a process for producing a stainless steel coating on at least a portion of the surface of a copper matrix, characterized in that unmelted or partially melted stainless steel particles are projected onto the matrix in copper to be coated using a carrier gas heated to a temperature between 50 and 800 ° C, said carrier gas being nitrogen or helium.
  • fine solid (unmelted) stainless steel particles are accelerated in a heated gas stream, particularly nitrogen (N 2 ) or helium (He) at a temperature less than 700 ° C, for example 350 ° C.
  • a heated gas stream particularly nitrogen (N 2 ) or helium (He) at a temperature less than 700 ° C, for example 350 ° C.
  • the carrier gas is therefore not sufficiently heated to allow the projected stainless steel to melt since it has a melting point of about 1450 ° C. to 1538 ° C. depending on the Cr and Ni it contains.
  • the heating of the particles and their projection are done by means of a heat spray gun 1, as illustrated in FIG. Figure 1 fed, on the one hand, with carrier gas 2, for example nitrogen from a storage tank or bottles of gas and, on the other hand, with powder 3 from a powder reserve .
  • carrier gas 2 for example nitrogen from a storage tank or bottles of gas
  • the spray gun 1 is provided with gas heating means 4 to give them the desired temperature, for example an electrical resistance 4 of 17 kW which heats the gas by direct or indirect contact.
  • the heated gas and the powder are mixed in a mixing chamber 5 located in the gun 1, before being expelled by a jet nozzle 6, for example a Laval nozzle with converge / divergent, and to go impact the copper matrix of the tube 10 to form the layer 7 (or the successive layers) of desired coating.
  • the nozzle / die distance is chosen empirically so as to obtain a homogeneous coating over the entire surface covered, typically the nozzle is at a distance between 30 mm and 60 mm of the matrix to be coated.
  • the matrix may be prepared, in particular sandblasting, prior to the projection of the stainless steel particles, so as to clean it (degreasing) and to promote the attachment of the projected particles.
  • the coating obtained has good adhesion to the matrix, is of good quality and almost devoid of porosity and the substrate (matrix) has not undergone any deformation or modification of its characteristics because of the low temperatures used.
  • the projected stainless steel powder has also retained its characteristics.
  • the stainless steel coating could then undergo, without breaking, a machining to give it a smooth surface appearance.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)

Claims (10)

  1. Verfahren zum Herstellen einer rostfreien Stahlbeschichtung auf mindestens einem Teil der Oberfläche einer Kupfermatrix, dadurch gekennzeichnet, dass nicht geschmolzene oder teilweise geschmolzene Partikel rostfreien Stahls auf die zu beschichtende Matrix gesprüht werden, indem ein Trägergas verwendet wird, das auf eine Temperatur zwischen 50 und 800 °C erhitzt wird, wobei das Trägergas Stickstoff oder Helium ist.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass das Trägergas auf eine Temperatur von mindestens 70 °C erhitzt wird und/oder das Trägergas auf eine Temperatur von höchstens 700 °C erhitzt wird.
  3. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Erhitzen des Gases mittels einer Sprühpistole erfolgt, die Mittel zum Erhitzen des Gases umfasst.
  4. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Partikel rostfreien Stahls nicht geschmolzen werden.
  5. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Partikel rostfreien Stahls eine durchschnittliche Größe zwischen 5 und 50 µm haben.
  6. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Beschichtung aus einer oder mehreren Schichten rostfreien Stahls gebildet ist.
  7. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Beschichtung eine Dicke zwischen 1 und 1.000 µm, vorzugsweise zwischen 10 und 500 µm hat.
  8. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Kupfermatrix von einem röhrenförmigen Teil oder einer Platte getragen oder gebildet ist.
  9. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Gas mit einer Geschwindigkeit zwischen 300 und 1.600 m/s, vorzugsweise von mindestens 400 m/s verteilt wird.
  10. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Trägergas/Pulver-Gemisch mittels einer Lavaldüse verteilt wird.
EP11153762A 2010-03-29 2011-02-09 Beschichtungsverfahren einer Beschichtung aus rostfreiem Stahl auf einem Kupfersubstrat Revoked EP2371994B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1052250A FR2957937B1 (fr) 2010-03-29 2010-03-29 Procede pour realiser un revetement d'acier inoxydable sur une matrice en cuivre

Publications (2)

Publication Number Publication Date
EP2371994A1 EP2371994A1 (de) 2011-10-05
EP2371994B1 true EP2371994B1 (de) 2013-04-03

Family

ID=42470681

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11153762A Revoked EP2371994B1 (de) 2010-03-29 2011-02-09 Beschichtungsverfahren einer Beschichtung aus rostfreiem Stahl auf einem Kupfersubstrat

Country Status (2)

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EP (1) EP2371994B1 (de)
FR (1) FR2957937B1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110952083B (zh) * 2019-12-04 2021-03-05 广东省新材料研究所 一种大厚度版辊铜涂层的制备方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1000026A (en) * 1963-01-21 1965-08-04 W G Jenkinson Ltd An improvement in or relating to heating appliances
IT1206312B (it) * 1982-01-22 1989-04-14 Thermo Electron Corp Metodo per formare uno stoppino per un tubo di calore.
CA2444917A1 (en) * 2002-10-18 2004-04-18 United Technologies Corporation Cold sprayed copper for rocket engine applications
US20060090593A1 (en) * 2004-11-03 2006-05-04 Junhai Liu Cold spray formation of thin metal coatings
US7393559B2 (en) * 2005-02-01 2008-07-01 The Regents Of The University Of California Methods for production of FGM net shaped body for various applications

Also Published As

Publication number Publication date
FR2957937B1 (fr) 2012-04-27
FR2957937A1 (fr) 2011-09-30
EP2371994A1 (de) 2011-10-05

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