EP0511076B1 - 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
EP0511076B1
EP0511076B1 EP92401113A EP92401113A EP0511076B1 EP 0511076 B1 EP0511076 B1 EP 0511076B1 EP 92401113 A EP92401113 A EP 92401113A EP 92401113 A EP92401113 A EP 92401113A EP 0511076 B1 EP0511076 B1 EP 0511076B1
Authority
EP
European Patent Office
Prior art keywords
nozzle
openings
series
central
carrier gas
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.)
Expired - Lifetime
Application number
EP92401113A
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English (en)
French (fr)
Other versions
EP0511076A1 (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
Expired - Lifetime legal-status Critical Current

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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

  • the present invention relates to the thermal spraying of a filler material onto a substrate to form a deposit, and more particularly to a deposit formation device by spraying a filler material onto a substrate, comprising a nozzle.
  • projection having a main axis and comprising a central passage for supplying filler material opening through a central orifice at one end of the nozzle and a plurality of oxy-fuel mixing conduits opening at the end of the nozzle through angular openings distributed around the central orifice, and an annular passage of carrier gas surrounding the end of the nozzle.
  • 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.
  • the carrier gas currently used is compressed air and the yields (ratio between the weight of filler material actually deposited on the substrate and the weight of filler material actually consumed) typically obtained are of the order of 55 to 57 % for the projection of zinc which is the most commonly used metal for making anti-corrosion deposits, in particular on metal pipes.
  • the object of the present invention is to provide a device of the above-mentioned type, which is improved, with reduced manufacturing costs and easy and flexible implementation, allowing a significant improvement in the projection efficiency and capable of being implemented. with reduced operating costs.
  • the openings of the mixing conduits are distributed in at least two series offset radially from one another relative to the main axis.
  • the carrier gas comprises between 1 and 10% of oxygen, typically between 2 and 8%, the remainder being nitrogen, and is typically supplied by an adsorption air separation unit or permeation.
  • the carrier gas can thus 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%.
  • Such 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 by virtue of the reduction in the volume of filler material which enters into combustion and a reduction in the quantity of oxidized particles exhibiting a state unsuitable for good attachment 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 without altering the quality of the deposit, and therefore to better concentrate the shot.
  • the nozzle comprises a central part defining the central passage and received in a tubular peripheral part, the etnat mixing conduits 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 the carrier gas and acetylene or propane as the combustible gas.
  • a projection nozzle consisting of a coaxial assembly of a tubular central portion 1 mounted in a tubular peripheral portion 2, this assembly being mounted coaxially in one end of a cylindrical support 3 itself mounted in a body 4 of the spray gun.
  • the peripheral part 2 comprises a central frusto-conical recess 5 connecting, at the rear, by a radial shoulder 6, to an annular chamber 7 of enlarged diameter.
  • the central part 1 has a central through passage 8 and comprises, at its periphery, two series of longitudinal grooves 9 a , 9 b , of different depths, angularly distributed and alternated.
  • the external profile of the ribbed portion of the central part 1 corresponds substantially to the internal profile 5 of the peripheral part 2.
  • 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 tubular support 3 comprises a plurality of longitudinal stepped passages 18 opening, downstream, into the downstream end of enlarged diameter of the stepped housing 13 and, upstream, in an annular chamber 19 communicating, via passages in the body 4, with a source of combustible gas 20, typically a propylene and methylacetylene compound sold under the name "TETRENE” or an ethylene and acetylene compound sold under the name "CRYLENE".
  • the middle portion of intermediate diameter of each passage 18 communicates, by a radial passage 21, with an annular chamber 22 communicating itself, via internal passages in the body 4, with a source of oxygen 23.
  • the oxycombustible mixture is formed in the passages 18 and is distributed homogeneously in the annular chambers 13 and 7 to supply, also in a homogeneous manner, the conduits 9 a , 9 b .
  • 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, providing a passage around the latter 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, thereby 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 part of the nozzle 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 ′.
  • the carrier gas source 32 may be a reservoir of nitrogen or argon or a mixture of the two.
  • this source of carrier gas 32 is constituted by a unit for separating gas from the adsorption or permeation air supplied with atmospheric air by a compressor 35, the permeate, consisting of oxygen-enriched air, being evacuated in 36.
  • the zinc spraying efficiency is improved by about 9% compared to the use of propane and compressed air.

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)

Claims (10)

  1. Vorrichtung zum Erzeugen einer Beschichtung aus einem aufzutragenden Werkstoff auf einem Substrat, mit einer Spritzdüse (1, 2), die eine Hauptachse hat und einen zentralen Zufuhrdurchlaß (8) für den aufzutragenden Werkstoff (15) umfaßt, der über eine zentrale Öffnung (16) in ein Ende der Düse mündet, und mit einer Vielzahl von Sauerstoff/Brennstoff-Gemischleitungen (9a, 9b), der über Öffnungen in das Düsenende mündet, die um die zentrale Öffnung herum winkelmäßig verteilt sind, und mit einem ringförmigen Trägergasdurchlaß (27), der das Ende der Düse (1, 2) umschließt, dadurch gekennzeichnet, daß die Öffnungen der Gemischleitungen (9a, 9b) sich auf zumindest zwei Serien verteilen, die, bezogen auf die Hauptachse, radial gegeneinander versetzt sind.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Öffnungen der Gemischleitungen (9a) einer Serie winkelmäßig gegenüber denjenigen (9b) der anderen Serie versetzt sind.
  3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Düse einen zentralen Bereich (1) umfaßt, der den zentralen Durchlaß (8) festlegt und in einem rohrförmigen Umfangsbereich (2) der Düse aufgenommen ist, wobei die Gemischleitungen (9a, 9b) an der ZwischenfIäche zwischen dem zentralen Bereich (1) und dem Umfangsbereich (2) ausgebildet sind und in zumindest eine erste und eine zweite Reihe von Öffnungen münden, wobei der Abstand zwischen der Hauptachse und den Öffnungen der ersten Serie größer ist als der Abstand zwischen der Hauptachse und den Öffnungen der zweiten Serie.
  4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß die Gemischleitungen (9a, 9b) von zumindest einer der Öffnungsserien durch Längsnuten gebildet sind, die in den Umfang des Hauptbereichs (1) eingefräst sind.
  5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß der Umfangsbereich (2) eine kegelstumpfförmige Ausnehmung (5) umfaßt, deren Innenprofil im wesentlichen dem Außenprofil des Hauptbereichs (1) entspricht.
  6. Vorrichtung nach Anspruch 4 oder 5, dadurch gekennzeichnet, daß die Nuten (9a, 9b) ein von außen nach innen abnehmendes Querschnittsprofil haben.
  7. Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Düse (1, 2) in einem gestuften Sitz (13) eines zylindrischen Trägers (3) angeordnet und durch eine Untereinheit (24, 25) gehalten ist, die eine Abschlußbuchse (25) umfaßt und den Trägergasdurchlaß (27) bildet.
  8. Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, daß der zylindrische Träger (3) und die Untereinheit (24, 25) durch einen Körper (4) getragen sind, der eine Zufuhrleitung (31, 30) für das Trägergas umfaßt, die mit einer Trägergasquelle (32) verbunden ist.
  9. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, daß die Trägergasquelle (32) eine Einheit zum Abtrennen von Gas und Luft ist.
  10. Vorrichtung nach Anspruch 9, dadurch gekennzeichnet, daß die Abtrenneinheit eine Adsorptions- oder Permeationszerlegungseinheit ist.
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 EP0511076A1 (de) 1992-10-28
EP0511076B1 true EP0511076B1 (de) 1994-12-07

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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)

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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

Family Cites Families (9)

* 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
US4232056A (en) * 1979-04-16 1980-11-04 Union Carbide Corporation Thermospray method for production of aluminum porous boiling surfaces
US4869936A (en) * 1987-12-28 1989-09-26 Amoco Corporation Apparatus and process for producing high density thermal spray coatings
US5019686A (en) * 1988-09-20 1991-05-28 Alloy Metals, Inc. High-velocity flame spray apparatus and method of forming materials
US4964568A (en) * 1989-01-17 1990-10-23 The Perkin-Elmer Corporation Shrouded thermal spray gun and method
US5186620A (en) * 1991-04-01 1993-02-16 Beckett Gas, Inc. Gas burner nozzle

Also Published As

Publication number Publication date
ES2066575T3 (es) 1995-03-01
DE69200802D1 (de) 1995-01-19
US5269462A (en) 1993-12-14
FR2675819A1 (fr) 1992-10-30
FR2675819B1 (fr) 1994-04-08
CA2066902A1 (fr) 1992-10-26
DE69200802T2 (de) 1995-04-13
EP0511076A1 (de) 1992-10-28

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