EP0511076A1 - Anlage zum Spritzbeschichten von einem Zusatzwerkstoff auf einem Substrat - Google Patents

Anlage zum Spritzbeschichten von einem Zusatzwerkstoff auf einem Substrat Download PDF

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Publication number
EP0511076A1
EP0511076A1 EP92401113A EP92401113A EP0511076A1 EP 0511076 A1 EP0511076 A1 EP 0511076A1 EP 92401113 A EP92401113 A EP 92401113A EP 92401113 A EP92401113 A EP 92401113A EP 0511076 A1 EP0511076 A1 EP 0511076A1
Authority
EP
European Patent Office
Prior art keywords
nozzle
central
carrier gas
series
filler material
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
EP92401113A
Other languages
English (en)
French (fr)
Other versions
EP0511076B1 (de
Inventor
Serge Suzon
Richard Soula
Michel Arnout
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
Lincoln Electric Co France SA
Original Assignee
La Soudure Autogene Francaise
Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
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 La Soudure Autogene Francaise, Air Liquide SA, LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude filed Critical La Soudure Autogene Francaise
Publication of EP0511076A1 publication Critical patent/EP0511076A1/de
Application granted granted Critical
Publication of EP0511076B1 publication Critical patent/EP0511076B1/de
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
    • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying

Definitions

  • Thermal flame projection brings together a whole set of processes with a view to modifying the surface properties of a substrate by the constitution, on this surface, of a deposit of a filler material, generally metallic.
  • the filler material Under the action of the combustion of the oxycombustible mixture, the filler material is brought gradually to its melting temperature and the carrier gas sprays the molten material into fine particles animated by a strong kinetic energy.
  • the particles in the liquid or pasty state strike the substrate initially prepared for this operation.
  • thermodynamic properties of the carrier gas play an important role in the value of the yield.
  • the vaporization temperature of the filler material can be quickly reached for particles of small diameter if the carrier gas has a high thermal conductivity.
  • the formation of oxides on the particles during their journey between the melting zone and the substrate to be coated is exothermic and can therefore lead to excessive evaporation of the material to be sprayed.
  • the first object of the present invention is to propose a method of the above-mentioned type, of easy and flexible implementation, allowing a significant improvement in the projection efficiency and capable of being implemented with reduced operating costs.
  • the carrier gas comprises between 1 and 10% of oxygen, typically between 2 and 8%, the rest being nitrogen, this carrier gas being typically supplied by a unit for separation of air at adsorption or permeation.
  • the carrier gas can be produced at low cost and, although a small amount of oxygen remains present, the increase in yield can reach, for the projection of zinc, 13%.
  • a carrier gas with a high proportion of inert gas in fact makes it possible to reduce the reactivity of the medium on the path of the particles thanks to the reduction of the oxidation zone and therefore allows a reduction in the volume of filler material entered into combustion and a decrease in the quantity of oxidized particles having a state unfit for good adhesion to the substrate.
  • the reduction in the volume of heat by the reduction in the volume of oxidized particles makes it possible to reduce the distance between the projection nozzle and the substrate without altering the quality of the deposit, and therefore to better concentrate the shot.
  • the combustible gas is essentially propane and sometimes acetylene.
  • propane the oxycombustible mixture has a specific power and a low deflagration speed, the flame obtained forming long darts and being generally too powerful.
  • acetylene has a high specific power and a high explosion speed, resulting in short darts and a locally too strong flame. Reducing the oxygen rate or the overall flow rate of the oxy-fuel mixture results in a significant drop in the deposition rate.
  • the oxy-fuel mixture is ejected, towards the filler material according to at least two series of ejection passages offset radially relative to the latter.
  • the present invention also aims to provide an improved projection device and reduced manufacturing costs particularly suitable for the implementation of the methods defined above, comprising a projection nozzle having a main axis and having a central passage d feed material opening through an orifice at one end of the nozzle, a plurality of oxy-fuel mixing conduits opening at the end of the nozzle through openings angularly distributed around the central orifice, and an annular passage of carrier gas surrounding the end of the nozzle, characterized in that the openings of the oxy-fuel mixture conduits are distributed in at least two series offset from each other relative to the main axis.
  • the known flame projection nozzles are in one piece and the mixing conduits consist of tubular passages drilled in the nozzle and ending in calibrated orifices of the same diameter distributed in a circle around the central orifice, in a delicate arrangement to make and allow only a very small number of adaptations.
  • the nozzle comprises a central part defining the central passage and fitted into a tubular peripheral part, the mixing conduits being formed at the interface between the central and peripheral parts and opening out through openings distributed in at minus a first and a second series, the distance between the main axis and the openings of the first series being greater than the distance between the openings of the second series and the main axis.
  • the mixing conduits are advantageously formed by longitudinal grooves milled in the periphery of the central part, which makes it possible to easily modulate the depth, shape and number of these mixing conduits, and reduce manufacturing costs.
  • Such a spraying device also proves to be more efficient and flexible to use than the devices known with conventional gases, namely air as carrier gas and acetylene or propane as combustible gas.
  • the ribs between the grooves 9 a , 9 b comprise a rear part of enlarged diameter 10 received in the annular chamber 7, abutting against the radial shoulder 6 but not extending over the entire axial extension of the annular chamber 7.
  • the central part 1 has a rear end 11 of reduced diameter while the peripheral part 2 has a rear end 12 of enlarged diameter, these rear ends being received in a stepped front housing 13 of the support 3 itself traversed by a central passage 14 through which the material filler, in the form of a homogeneous or compacted wire 15, coupled to drive means (not shown), advances in the central passage 8 of the central part 1 to exit, at the front end of the nozzle, by a central orifice 15 around which the conduits 9A, 9B open (FIG. 2).
  • the passage 8 advantageously comprises, in the vicinity of the central orifice 16, a tubular liner 17 made of more wear-resistant material, for example stainless steel.
  • the central nozzle part 1 and peripheral nozzle part 2 assembly is mounted and held against an internal shoulder of the housing 13 by a nut 24 screwed onto the front end of the support 3.
  • a nut 24 screwed onto the front end of the support 3.
  • an end sleeve 25 surrounding the peripheral part 2 and defining an internal housing ending, at the front, by a converging conical part 26 surrounding the front end of the peripheral part 2 by providing, around the latter, a passage annular 27.
  • the sleeve 25 is held and locked in position in the nut 24 by a peripheral cover 28 screwed onto the front end of the body 4, thus forming an annular chamber 29 around the nut 24 and the rear part of the sleeve 25.
  • the front end of the body 4 comprises an annular chamber 30 communicating, via an internal passage 31, with a source of carrier gas 32.
  • the sleeve 24 comprises radial passages 33 establishing the communication between the chamber 29 in the cover 28 and the annular space between the sleeve 25 and the peripheral nozzle part 2.
  • the carrier gas coming from the source 32 is distributed uniformly in the annular chamber 30, then passes into the annular chamber 29 by cooling the nut 24 and the rear part of the sleeve 25, then from there, through the passages 33, in the annular chamber between the sleeve 25 and the part peripheral 2 towards the outlet passage 26, by cooling the peripheral nozzle part 2.
  • the nozzle design according to the invention allows obtaining a stepped heater, alternately mixing conduits 9 a, 9 b to differently distribute the combustion darts 34a , 34b around the material to be melted 15.
  • the conduits 9b at a closer distance from the axis of the nozzle give a strong heating 34b of the material to be melted a short distance from the front face of the nozzle and cause a rapid rise in temperature. of the material 15.
  • the other conduits 9a provide heating 34a further from the end of the nozzle and contribute to a gradual rise in temperature of the material to be melted 15.
  • the design of the nozzle in two parts allows the execution of conduits of very different shapes, for example, as shown from left to right in Figure 2, grooves with rectangular, triangular or trapezoidal section.
  • the ease of machining also makes it possible to increase the number of conduits and their angular distribution, and thus to improve the distribution of the heating on the material to be melted. It is thus also possible, as shown on the right in FIG. 2, to produce the conduits by a combination of drilled holes 9b and more or less deep grooves 9a, 9a ′.

Landscapes

  • 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)
  • Nozzles (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)
EP92401113A 1991-04-25 1992-04-21 Anlage zum Spritzbeschichten von einem Zusatzwerkstoff auf einem Substrat Expired - Lifetime EP0511076B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9105081 1991-04-25
FR9105081A FR2675819B1 (fr) 1991-04-25 1991-04-25 Procede et dispositif de formation de depot par projection d'un materiau d'apport sur substrat.

Publications (2)

Publication Number Publication Date
EP0511076A1 true EP0511076A1 (de) 1992-10-28
EP0511076B1 EP0511076B1 (de) 1994-12-07

Family

ID=9412223

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92401113A Expired - Lifetime EP0511076B1 (de) 1991-04-25 1992-04-21 Anlage zum Spritzbeschichten von einem Zusatzwerkstoff auf einem Substrat

Country Status (6)

Country Link
US (1) US5269462A (de)
EP (1) EP0511076B1 (de)
CA (1) CA2066902A1 (de)
DE (1) DE69200802T2 (de)
ES (1) ES2066575T3 (de)
FR (1) FR2675819B1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AR028415A1 (es) * 2000-05-24 2003-05-07 Fosbel Intellectual Ag Procedimiento para formar una capa vetrea sobre una superficie refractaria
US20110209392A1 (en) * 2010-02-26 2011-09-01 Sharps Compliance, Inc. Coated particulate and shaped fuels and methods for making and using same
US11919026B1 (en) * 2018-05-31 2024-03-05 Flame-Spray Industries, Inc. System, apparatus, and method for deflected thermal spraying

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0017944A1 (de) * 1979-04-16 1980-10-29 Union Carbide Corporation Thermisches Spritzverfahren zur Herstellung von porösen Siedeflächen aus Aluminium
EP0323185A2 (de) * 1987-12-28 1989-07-05 Amoco Corporation Apparat und Verfahren zum Erzeugen einer Beschichtung von hoher Dichte durch thermische Zerstäubung
EP0361710A1 (de) * 1988-09-20 1990-04-04 Plasma Technik Ag Hochgeschwindigkeits-Flammspritzvorrichtung
EP0379119A1 (de) * 1989-01-17 1990-07-25 The Perkin-Elmer Corporation Abgeschirmte Heissspritzpistole und Verwendung derselben

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2340903A (en) * 1940-07-31 1944-02-08 Metallizing Engineering Compan Metal spray gun
CH250665A (de) * 1944-04-20 1947-09-15 Staeubli Willy Metallspritzpistole.
US2832640A (en) * 1954-12-09 1958-04-29 Metallizing Engineering Co Inc Heat fusible material spray gun
US3526366A (en) * 1968-05-07 1970-09-01 Bethlehem Steel Corp Oxygen-jet cutting tip
US5186620A (en) * 1991-04-01 1993-02-16 Beckett Gas, Inc. Gas burner nozzle

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0017944A1 (de) * 1979-04-16 1980-10-29 Union Carbide Corporation Thermisches Spritzverfahren zur Herstellung von porösen Siedeflächen aus Aluminium
EP0323185A2 (de) * 1987-12-28 1989-07-05 Amoco Corporation Apparat und Verfahren zum Erzeugen einer Beschichtung von hoher Dichte durch thermische Zerstäubung
EP0361710A1 (de) * 1988-09-20 1990-04-04 Plasma Technik Ag Hochgeschwindigkeits-Flammspritzvorrichtung
EP0379119A1 (de) * 1989-01-17 1990-07-25 The Perkin-Elmer Corporation Abgeschirmte Heissspritzpistole und Verwendung derselben

Also Published As

Publication number Publication date
EP0511076B1 (de) 1994-12-07
CA2066902A1 (fr) 1992-10-26
DE69200802D1 (de) 1995-01-19
US5269462A (en) 1993-12-14
FR2675819A1 (fr) 1992-10-30
FR2675819B1 (fr) 1994-04-08
ES2066575T3 (es) 1995-03-01
DE69200802T2 (de) 1995-04-13

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