EP0924315A1 - Production of hot gas for thermal spraying - Google Patents
Production of hot gas for thermal spraying Download PDFInfo
- Publication number
- EP0924315A1 EP0924315A1 EP98123464A EP98123464A EP0924315A1 EP 0924315 A1 EP0924315 A1 EP 0924315A1 EP 98123464 A EP98123464 A EP 98123464A EP 98123464 A EP98123464 A EP 98123464A EP 0924315 A1 EP0924315 A1 EP 0924315A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas
- gas mixture
- mixture
- heating
- heated
- 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
Links
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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/16—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed
- B05B7/1606—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed the spraying of the material involving the use of an atomising fluid, e.g. air
- B05B7/1613—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed the spraying of the material involving the use of an atomising fluid, e.g. air comprising means for heating the atomising fluid before mixing with the material to be sprayed
Definitions
- the invention relates to a method for coating substrate materials thermal spraying, wherein the gas or gas mixture from at least one gas pressure vessel into a gas buffer container and from this gas buffer container to one Device for mixing a powdered filler material with the gas or gas mixture is passed, wherein the gas or gas mixture is heated and wherein the filler material by means of the gas or gas mixture on the to be coated Surface of the substrate material is passed.
- the invention relates also a device for coating substrate materials by thermal Syringes, the device at least one gas pressure container, at least a gas buffer container, a device for mixing a powder Filler material with the gas or gas mixture and a device for heating of the gas or gas mixture, and lines for the gas or gas mixture the gas pressure container into the gas buffer container and from this gas buffer container to the device for mixing the powdered filler material with the Includes gas or gas mixture.
- Thermal spraying for coating is known as autogenous as process variants Flame spraying or high-speed flame spraying, arc spraying, plasma spraying, detonation spraying and laser spraying.
- Thermal spray processes are essentially characterized in that they enable evenly applied coatings.
- Coatings can be applied by varying the spray materials can be adapted to different requirements.
- the spray materials can be processed in the form of wires, rods or as powder. With thermal In addition, thermal post-treatment can be provided for spraying.
- the gas or gas mixture with the aid of which the filler material is applied to the material to be coated Surface of the substrate material is usually conducted in one or more gas pressure vessels, for example one or more gas tanks, stored under high pressure.
- gas pressure vessels for example one or more gas tanks
- the liquefied gas is converted into the gaseous state. Furthermore a pressure increase is required.
- air and / or helium are also suitable for the powdered filler gas carrying a nitrogen, argon, neon, krypton, Xenon, oxygen, a gas containing hydrogen, a carbon-containing gas, in particular carbon dioxide, or mixtures of the aforementioned gases and Mixtures of these gases with helium.
- the proportion of helium in the total gas can be up to 90% by volume.
- a helium content of 10 to 50% by volume is preferred Gas mixture observed.
- the layers produced in this way adhere very well to a wide variety of substrate materials, for example on metal, metal alloys, ceramics, glass, plastics and composite materials.
- the coatings are of high quality, have an extraordinary low porosity and have extremely smooth spray surfaces, so that rework is usually not necessary.
- the gases mentioned have one sufficient density and speed of sound to meet the required high To be able to ensure speeds of the powder particles.
- the gas can contain inert and / or reactive gases. With the gases mentioned is the manufacture of very dense and particularly uniform coatings possible, which also characterized by their hardness and strength.
- the layers point extremely low oxide levels.
- substrate is not heated by a flame or a plasma, so none or only extremely minor changes to the base body and also no distortion of Workpieces occur due to thermal stresses due to thermal spraying.
- the gas or gas mixture be buffered. It is conceivable that the hot gas generation directly in the Buffer tank, i.e. the gas or gas mixture stored for buffering to heat in the buffer tank. This seems advantageous because in this case with With the help of a control unit, the desired pressure and temperature can be easily achieved for the gas jet carrying the powdered filler material can.
- the present invention is based on the object of the method mentioned at the outset and to further develop the device, in particular the efficiency and the Increase flexibility.
- the task is solved for the method in that the gas or Gas mixture is heated after leaving the gas buffer container.
- the object is achieved for the device in that the device for heating the gas or gas mixture in the flow direction after the Gas buffer container is arranged.
- the advantage of the invention is that on the one hand only the gas and directly required not the entire amount of buffered gas is heated and thus the hot gas generation becomes more efficient, easier to set and cheaper.
- the energy efficiency can further and also the flexibility increase.
- the gas line must between the buffer container and the device for mixing the powder Filler material with the gas or gas mixture are thermally insulated and / or the heat loss in this line when heating the gas or gas mixture be taken into account.
- thermal insulation leads to thick relatively stiff and little or not flexible cables. These restrict the Flexibility and reduce or prevent the mobility of the device for Mixing the powdered filler material with the gas or gas mixture.
- the device for mixing the powdered Filler material with the gas or gas mixture for example a Spray gun, can also be carried out by hand if necessary.
- the hot gas can be generated by means of an electrical resistance heater. This has the advantage of easy-to-use and inexpensive heating.
- the gas or gas mixture can also be by means of a flame burner or a plasma torch. These options are usually energetic very cheap. Inductive heating can also be used (Induction heating) can be provided for heating the gas or gas mixture.
- the gas jet can reach a temperature in the range between 30 and 1000 ° C, preferably heated between 100 and 800 ° C, all known powdered spray materials can be used, for example spray powder made of metals, metal alloys, hard materials, ceramics and / or plastics.
- a gas jet with a Pressure of 5 to 50 bar can be used.
- gas pressures in the range of 21 are particularly suitable up to 50 bar.
- Excellent spray results were achieved, for example, with gas pressures of about 35 bar.
- the high pressure gas supply can for example by method described in the own German patent application DE 197 16 414.5 or the gas supply system described there can be ensured.
- the powder particles can advantageously at a speed of 300 to 1600 m / s can be accelerated.
- Speeds are particularly suitable the powder particles between 1000 and 1600 m / s, particularly preferred between 1250 and 1600 m / s, because in this case the energy transfer in the form of kinetic energy is particularly high.
- the powders used in the process according to the invention preferably have Particle sizes from 1 to 100 ⁇ m.
- the invention also offers the possibility in connection with automation and with computer-controlled movement of the substrate or the device for Mixing the powdered filler material with the gas or gas mixture or the spray gun the thermal spray process particularly quickly and to perform inexpensively.
Abstract
Description
Die Erfindung betrifft ein Verfahren zum Beschichten von Substratwerkstoffen durch thermisches Spritzen, wobei das Gas oder Gasgemisch aus mindestens einem Gasdruckbehälter in einen Gaspufferbehälter und von diesem Gaspufferbehälter zu einer Vorrichtung zum Vermischen eines pulverförmigen Zusatzwerkstoffes mit dem Gas oder Gasgemisch geleitet wird, wobei das Gas oder Gasgemisch erhitzt wird und wobei der Zusatzwerkstoff mittels des Gases oder Gasgemisches auf die zu beschichtende Oberfläche des Substratwerkstoffes geleitet wird. Die Erfindung betrifft ferner eine Vorrichtung zum Beschichten von Substratwerkstoffen durch thermisches Spritzen, wobei die Vorrichtung mindestens einen Gasdruckbehälter, mindestens einen Gaspufferbehälter, eine Vorrichtung zum Vermischen eines pulverförmigen Zusatzwerkstoffes mit dem Gas oder Gasgemisch und eine Vorrichtung zum Erhitzen des Gases oder Gasgemisches, sowie Leitungen für das Gas oder Gasgemisch aus dem Gasdruckbehälter in den Gaspufferbehälter und von diesem Gaspufferbehälter zu der Vorrichtung zum Vermischen des pulverförmigen Zusatzwerkstoffes mit dem Gas oder Gasgemisch umfaßt.The invention relates to a method for coating substrate materials thermal spraying, wherein the gas or gas mixture from at least one gas pressure vessel into a gas buffer container and from this gas buffer container to one Device for mixing a powdered filler material with the gas or gas mixture is passed, wherein the gas or gas mixture is heated and wherein the filler material by means of the gas or gas mixture on the to be coated Surface of the substrate material is passed. The invention relates also a device for coating substrate materials by thermal Syringes, the device at least one gas pressure container, at least a gas buffer container, a device for mixing a powder Filler material with the gas or gas mixture and a device for heating of the gas or gas mixture, and lines for the gas or gas mixture the gas pressure container into the gas buffer container and from this gas buffer container to the device for mixing the powdered filler material with the Includes gas or gas mixture.
Das thermische Spritzen zum Beschichten kennt als Verfahrensvarianten das autogene Flammspritzen oder das Hochgeschwindigkeits-Flammspritzen, das Lichtbogenspritzen, das Plasmaspritzen, das Detonationsspritzen und das Laserspritzen.Thermal spraying for coating is known as autogenous as process variants Flame spraying or high-speed flame spraying, arc spraying, plasma spraying, detonation spraying and laser spraying.
Thermische Spritzverfahren werden in allgemeiner Form beispielsweise in
- Übersicht und Einführung in das "Thermische Spritzen", Peter Heinrich,
Linde-Berichte aus Technik und Wissenschaft, 52/1982, Seiten 29 bis 37,
oder - Thermisches Spritzen - Fakten und Stand der Technik, Peter Heinrich, Jahrbuch Oberflächentechnik 1992, Band 48, 1991, Seiten 304 bis 327, Metall-Verlag GmbH,
- Overview and introduction to "thermal spraying", Peter Heinrich, Linde reports from technology and science, 52/1982, pages 29 to 37,
or - Thermal spraying - facts and state of the art , Peter Heinrich, yearbook surface technology 1992, volume 48, 1991, pages 304 to 327, Metall-Verlag GmbH,
Thermische Spritzverfahren zeichnen sich im wesentlichen dadurch aus, daß sie gleichmäßig aufgetragene Beschichtungen ermöglichen. Durch thermische Spritzverfahren aufgetragene Beschichtungen können durch Variation der Spritzmaterialien an unterschiedliche Anforderungen angepaßt werden. Die Spritzmaterialien können dabei in Form von Drähten, Stäben oder als Pulver verarbeitet werden. Beim thermischen Spritzen kann zusätzlich eine thermische Nachbehandlung vorgesehen sein.Thermal spray processes are essentially characterized in that they enable evenly applied coatings. By thermal spraying Coatings can be applied by varying the spray materials can be adapted to different requirements. The spray materials can can be processed in the form of wires, rods or as powder. With thermal In addition, thermal post-treatment can be provided for spraying.
In jüngerer Zeit wurde darüber hinaus ein weiteres thermisches Spritzverfahren entwickelt, welches auch als Kaltgasspritzen bezeichnet wird. Es handelt sich dabei um eine Art Weiterentwicklung des Hochgeschwindigkeits-Flammspritzens. Dieses Verfahren ist beispielsweise in der europäischen Patentschrift EP 0 484 533 B1 beschrieben. Beim Kaltgasspritzen kommt ein Zusatzwerkstoff in Pulverform zum Einsatz. Die Pulverpartikel werden beim Kaltgasspritzen jedoch nicht im Gasstrahl geschmolzen. Vielmehr liegt die Temperatur des Gasstrahles unterhalb des Schmelzpunktes der Zusatzwerkstoffpulverpartikel (EP 0 484 533 B1). Im Kaltgasspritzverfahren wird also ein im Vergleich zu den herkömmlichen Spritzverfahren "kaltes" bzw. ein vergleichsweise kälteres Gas verwendet. Gleichwohl wird das Gas aber ebenso wie in den herkömmlichen Verfahren erwärmt, aber in der Regel lediglich auf Temperaturen unterhalb des Schmelzpunktes der Pulverpartikel des Zusatzwerkstoffes.Recently, another thermal spraying process has also been developed which is also known as cold gas spraying. It is about a kind of further development of high-speed flame spraying. This The method is described, for example, in European Patent EP 0 484 533 B1 described. A filler material in powder form is used for cold gas spraying. However, the powder particles are not melted in a gas jet during cold gas spraying. Rather, the temperature of the gas jet is below the melting point the filler material powder particle (EP 0 484 533 B1). In the cold gas spray process is a "cold" or "cold" used a comparatively colder gas. Nonetheless, the gas does the same as heated in the conventional methods, but usually only at temperatures below the melting point of the powder particles of the filler material.
Das Gas oder Gasgemisch, mit dessen Hilfe der Zusatzwerkstoff auf die zu beschichtende Oberfläche des Substratwerkstoffes geleitet wird, wird üblicherweise in einem oder mehreren Gasdruckbehälter, beispielsweise einem oder mehreren Gastanks, unter hohem Druck gespeichert. Im Falle der Speicherung als tiefkalt verflüssigter Gase ist üblicherweise zunächst eine Hochdruckverdampfer vorhanden, in welchem das verflüssigte Gas in den gasförmigen Aggregatzustand überführt wird. Außerdem ist eine Druckerhöhung erforderlich.The gas or gas mixture with the aid of which the filler material is applied to the material to be coated Surface of the substrate material is usually conducted in one or more gas pressure vessels, for example one or more gas tanks, stored under high pressure. In the case of storage as cryogenic liquefied Gases is usually initially available in a high pressure evaporator the liquefied gas is converted into the gaseous state. Furthermore a pressure increase is required.
Als Gase für das thermische Spritzen kommen beispielsweise Stickstoff, Helium, Argon, Neon, Krypton, Xenon, ein Wasserstoff enthaltendes Gas, ein kohlenstoffhaltiges Gas, insbesondere Kohlendioxid, Sauerstoff, ein Sauerstoff enthaltendes Gas, Luft oder Mischungen der vorgenannten Gase in Frage. Neben den aus der EP 0 484 533 B1 bekannten Gasen Luft und/oder Helium eignen sich auch für das den pulverförmigen Zusatzwerkstoff tragende Gas ein Stickstoff, Argon, Neon, Krypton, Xenon, Sauerstoff, ein Wasserstoff enthaltendes Gas, ein kohlenstoffhaltiges Gas, insbesondere Kohlendioxid, oder Mischungen der vorgenannten Gase und Mischungen dieser Gase mit Helium. Der Anteil des Helium am Gesamtgas kann bis zu 90 Vol.-% betragen. Bevorzugt wird ein Heliumanteil von 10 bis 50 Vol.-% im Gasgemisch eingehalten.For example, nitrogen, helium, Argon, neon, krypton, xenon, a gas containing hydrogen, a carbon-containing one Gas, especially carbon dioxide, oxygen, an oxygen-containing Gas, air or mixtures of the aforementioned gases in question. In addition to those from the EP 0 484 533 B1 known gases air and / or helium are also suitable for the powdered filler gas carrying a nitrogen, argon, neon, krypton, Xenon, oxygen, a gas containing hydrogen, a carbon-containing gas, in particular carbon dioxide, or mixtures of the aforementioned gases and Mixtures of these gases with helium. The proportion of helium in the total gas can be up to 90% by volume. A helium content of 10 to 50% by volume is preferred Gas mixture observed.
Es hat sich gezeigt, daß durch den Einsatz von unterschiedlichen Gasen zum Beschleunigen und Tragen des pulverförmigen Zusatzwerkstoffes die Flexibilität und Wirksamkeit des thermischen Spritzverfahrens wesentlich vergrößert werden kann. Die so hergestellten Schichten haften sehr gut auf den verschiedensten Substratwerkstoffen, beispielsweise auf Metall, Metallegierungen, Keramik, Glas, Kunststoffe und Verbundwerkstoffe. Die Beschichtungen sind von hoher Güte, weisen eine außerordentlich geringe Porosität auf und besitzen extrem glatte Spritzoberflächen, so daß sich in der Regel eine Nacharbeitung erübrigt. Die erwähnten Gase besitzen eine ausreichende Dichte und Schallgeschwindigkeit, um die erforderlichen hohen Geschwindigkeiten der Pulverpartikel gewährleisten zu können. Das Gas kann dabei inerte und/oder reaktive Gase enthalten. Mit den genannten Gasen ist die Herstellung von sehr dichten und besonders gleichmäßigen Beschichtungen möglich, welche sich außerdem durch ihre Härte und Festigkeit auszeichnen. Die Schichten weisen extrem geringe Oxidgehalte auf. Sie besitzen keine oder zumindest keine ausgeprägte Textur, d.h. es gibt keine Vorzugsorientierung der einzelnen Körner oder Kristalle. Das Substrat wird ferner nicht durch eine Flamme oder ein Plasma erwärmt, so daß keine oder nur extrem geringe Veränderungen am Grundkörper und auch kein Verzug von Werkstücken durch Wärmespannungen infolge des thermischen Spritzens auftreten.It has been shown that by using different gases to accelerate and carrying the powdered filler the flexibility and Effectiveness of the thermal spray process can be increased significantly. The layers produced in this way adhere very well to a wide variety of substrate materials, for example on metal, metal alloys, ceramics, glass, plastics and composite materials. The coatings are of high quality, have an extraordinary low porosity and have extremely smooth spray surfaces, so that rework is usually not necessary. The gases mentioned have one sufficient density and speed of sound to meet the required high To be able to ensure speeds of the powder particles. The gas can contain inert and / or reactive gases. With the gases mentioned is the manufacture of very dense and particularly uniform coatings possible, which also characterized by their hardness and strength. The layers point extremely low oxide levels. They have none, or at least none Texture, i.e. there is no preferred orientation of the individual grains or crystals. The Furthermore, substrate is not heated by a flame or a plasma, so none or only extremely minor changes to the base body and also no distortion of Workpieces occur due to thermal stresses due to thermal spraying.
Um sich für die Güte der gespritzten Schicht nachteilig auswirkende Druckschwankungen des Gases oder Gasgemisches zu verhindern, kann das Gas oder Gasgemisch gepuffert werden. Dabei ist denkbar, die Heißgaserzeugung direkt im Pufferbehälter vorzunehmen, d.h. das zur Pufferung gespeicherte Gas oder Gasgemisch im Pufferbehälter zu erhitzen. Dies erscheint vorteilhaft, da in diesem Fall mit Hilfe einer Steuereinheit leicht der gewünschte Druck und die gewünschte Temperatur für den das pulverförmigen Zusatzwerkstoff tragenden Gasstrahl eingestellt werden können. In order to have pressure fluctuations which have an adverse effect on the quality of the sprayed layer To prevent the gas or gas mixture, the gas or gas mixture be buffered. It is conceivable that the hot gas generation directly in the Buffer tank, i.e. the gas or gas mixture stored for buffering to heat in the buffer tank. This seems advantageous because in this case with With the help of a control unit, the desired pressure and temperature can be easily achieved for the gas jet carrying the powdered filler material can.
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, das eingangs genannte Verfahren und die Vorrichtung weiterzubilden, insbesondere die Effizienz und die Flexibilität zu vergrößern.The present invention is based on the object of the method mentioned at the outset and to further develop the device, in particular the efficiency and the Increase flexibility.
Die gestellte Aufgabe wird für das Verfahren dadurch gelöst, daß das Gas oder Gasgemisch nach Verlassen des Gaspufferbehälters erhitzt wird.The task is solved for the method in that the gas or Gas mixture is heated after leaving the gas buffer container.
Die gestellte Aufgabe wird für die Vorrichtung dadurch gelöst, daß die Vorrichtung zum Erhitzen des Gases oder Gasgemisches in Strömungsrichtung nach dem Gaspufferbehälter angeordnet ist.The object is achieved for the device in that the device for heating the gas or gas mixture in the flow direction after the Gas buffer container is arranged.
Der Vorteil der Erfindung liegt darin, daß einerseits nur das direkt benötigte Gas und nicht die gesamte gepufferte Gasmenge erhitzt wird und somit die Heißgaserzeugung effizienter, leichter einstellbar und kostengünstiger wird.The advantage of the invention is that on the one hand only the gas and directly required not the entire amount of buffered gas is heated and thus the hot gas generation becomes more efficient, easier to set and cheaper.
Dadurch, daß das Gas oder Gasgemisch unmittelbar vor der Vorrichtung zum Vermischen des pulverförmigen Zusatzwerkstoffes mit dem Gas oder Gasgemisch erhitzt wird, kann die energetische Effizienz weiter und zusätzlich die Flexibilität erhöht werden. Denn bei der Heißgaserzeugung im Pufferbehälter muß die Gasleitung zwischen Pufferbehälter und Vorrichtung zum Vermischen des pulverförmigen Zusatzwerkstoffes mit dem Gas oder Gasgemisch thermisch isoliert werden und/oder der Wärmeverlust in dieser Leitung beim Erhitzen des Gases oder Gasgemisches berücksichtigt werden. Insbesondere eine thermische Isolierung führt aber zu dicken relativ steifen und wenig oder gar nicht biegsamen Leitungen. Diese schränken die Flexibilität ein und reduzieren oder verhindern die Beweglichkeit der Vorrichtung zum Vermischen des pulverförmigen Zusatzwerkstoffes mit dem Gas oder Gasgemisch. Mit der Erfindung wird ermöglicht, daß die Vorrichtung zum Vermischen des pulverförmigen Zusatzwerkstoffes mit dem Gas oder Gasgemisch, beispielsweise eine Spritzpistole, auch gegebenenfalls von Hand geführt werden kann.The fact that the gas or gas mixture immediately before the device for Mixing the powdered filler material with the gas or gas mixture is heated, the energy efficiency can further and also the flexibility increase. Because when generating hot gas in the buffer tank, the gas line must between the buffer container and the device for mixing the powder Filler material with the gas or gas mixture are thermally insulated and / or the heat loss in this line when heating the gas or gas mixture be taken into account. In particular, thermal insulation leads to thick relatively stiff and little or not flexible cables. These restrict the Flexibility and reduce or prevent the mobility of the device for Mixing the powdered filler material with the gas or gas mixture. With the invention it is possible that the device for mixing the powdered Filler material with the gas or gas mixture, for example a Spray gun, can also be carried out by hand if necessary.
Die Heißgaserzeugung kann mittels einer elektrischen Widerstandsheizung erfolgen. Diese bringt den Vorteil einer gut handhabbaren und wenig aufwendigen Heizung. Das Gas oder Gasgemisch kann aber auch mittels eines Flammbrenners oder mittels eines Plasmabrenners erhitzt werden. Diese Möglichkeiten sind in der Regel energetisch besonders günstig. Darüber hinaus kann auch eine induktive Erwärmung (Induktionsheizung) zur Erhitzung des Gases oder Gasgemisches vorgesehen sein.The hot gas can be generated by means of an electrical resistance heater. This has the advantage of easy-to-use and inexpensive heating. The gas or gas mixture can also be by means of a flame burner or a plasma torch. These options are usually energetic very cheap. Inductive heating can also be used (Induction heating) can be provided for heating the gas or gas mixture.
Der Gasstrahl kann auf eine Temperatur im Bereich zwischen 30 und 1000 °C, vorzugsweise zwischen 100 und 800 °C erwärmt werden, wobei alle bekannten pulverförmigen Spritzmaterialien eingesetzt werden können, beispielsweise Spritzpulver aus Metallen, Metallegierungen, Hartstoffen, Keramiken und/oder Kunststoffen.The gas jet can reach a temperature in the range between 30 and 1000 ° C, preferably heated between 100 and 800 ° C, all known powdered spray materials can be used, for example spray powder made of metals, metal alloys, hard materials, ceramics and / or plastics.
Im Zusammenhang mit der Erfindung kann insbesondere ein Gasstrahl mit einem Druck von 5 bis 50 bar eingesetzt werden. Vor allem das Arbeiten mit höheren Gasdrücken bringt zusätzliche Vorteile, da die Energieübertragung in Form von kinetischer Energie erhöht wird. Es eignen sich insbesondere Gasdrücke im Bereich von 21 bis 50 bar. Hervorragende Spritzergebnisse wurden beispielsweise mit Gasdrücken von etwa 35 bar erzielt. Die Hochdruckgasversorgung kann beispielsweise durch das in der eigenen deutschen Patentanmeldung DE 197 16 414.5 beschriebene Verfahren bzw. die dort beschriebene Gasversorgungsanlage sichergestellt werden.In connection with the invention, in particular a gas jet with a Pressure of 5 to 50 bar can be used. Above all, working with higher gas pressures brings additional benefits as the energy transfer in the form of kinetic Energy is increased. Gas pressures in the range of 21 are particularly suitable up to 50 bar. Excellent spray results were achieved, for example, with gas pressures of about 35 bar. The high pressure gas supply can for example by method described in the own German patent application DE 197 16 414.5 or the gas supply system described there can be ensured.
Die Pulverpartikel können vorteilhafterweise auf eine Geschwindigkeit von 300 bis 1600 m/s beschleunigt werden. Es eignen sich dabei insbesondere Geschwindigkeiten der Pulverpartikel zwischen 1000 und 1600 m/s, besonders bevorzugt zwischen 1250 und 1600 m/s, da in diesem Fall die Energieübertragung in Form von kinetischer Energie besonders hoch ausfällt.The powder particles can advantageously at a speed of 300 to 1600 m / s can be accelerated. Speeds are particularly suitable the powder particles between 1000 and 1600 m / s, particularly preferred between 1250 and 1600 m / s, because in this case the energy transfer in the form of kinetic energy is particularly high.
Die im erfindungsgemäßen Verfahren eingesetzten Pulver besitzen bevorzugt Partikelgrößen von 1 bis 100 µm.The powders used in the process according to the invention preferably have Particle sizes from 1 to 100 µm.
Die Erfindung bietet auch die Möglichkeit, in Verbindung mit einer Automatisierung und mit computergesteuerter Bewegung des Substrats oder der Vorrichtung zum Vermischen des pulverförmigen Zusatzwerkstoffes mit dem Gas oder Gasgemisch bzw. der Spritzpistole das thermische Spritzverfahren besonders rasch und kostengünstig durchzuführen.The invention also offers the possibility in connection with automation and with computer-controlled movement of the substrate or the device for Mixing the powdered filler material with the gas or gas mixture or the spray gun the thermal spray process particularly quickly and to perform inexpensively.
Claims (13)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19756594 | 1997-12-18 | ||
| DE19756594A DE19756594A1 (en) | 1997-12-18 | 1997-12-18 | Hot gas generation during thermal spraying |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0924315A1 true EP0924315A1 (en) | 1999-06-23 |
| EP0924315B1 EP0924315B1 (en) | 2004-03-10 |
Family
ID=7852562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98123464A Expired - Lifetime EP0924315B1 (en) | 1997-12-18 | 1998-12-11 | Production of hot gas for thermal spraying |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0924315B1 (en) |
| DE (2) | DE19756594A1 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1321540A1 (en) * | 2000-08-25 | 2003-06-25 | Obschestvo S Organichennoi Otvetstvenoctiju Obninsky Tsentr Poroshkovogo Naplyleniya | Coating method |
| EP1200200B1 (en) * | 1999-06-29 | 2004-04-07 | Delphi Technologies, Inc. | Kinetic spray coating method and apparatus |
| EP2127759A1 (en) | 2008-05-30 | 2009-12-02 | Linde AG | Cold gas spraying device and method for cold gas spraying |
| DE102009009474A1 (en) | 2009-02-19 | 2010-08-26 | Linde Ag | High pressure cold gas spray system i.e. cold gas spray gun, has particle supply line whose section facing nozzle i.e. laval nozzle, is extended in direction of symmetry axis of nozzle |
| EP2617868A1 (en) * | 2012-01-17 | 2013-07-24 | Linde Aktiengesellschaft | Method and device for thermal spraying |
| WO2016000004A2 (en) | 2014-07-03 | 2016-01-07 | Plansee Se | Method for producing a layer |
| US9365918B2 (en) | 2012-01-17 | 2016-06-14 | Linde Aktiengesellschaft | Method and apparatus for thermal spraying |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3918379B2 (en) | 1999-10-20 | 2007-05-23 | トヨタ自動車株式会社 | Thermal spraying method, thermal spraying device and powder passage device |
| DE102005053731A1 (en) | 2005-11-10 | 2007-05-24 | Linde Ag | Apparatus for high pressure gas heating |
| EP1806183A1 (en) | 2006-01-10 | 2007-07-11 | Siemens Aktiengesellschaft | Nozzle arrangement and method for cold gas spraying |
| EP1806429B1 (en) | 2006-01-10 | 2008-07-09 | Siemens Aktiengesellschaft | Cold spray apparatus and method with modulated gasstream |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1326116A (en) * | 1970-09-24 | 1973-08-08 | Saviem | Metallising machines |
| DE3543484A1 (en) * | 1985-12-03 | 1987-06-11 | Inst Materialovedenija Akademi | GAS DETONATION SYSTEM FOR COATING PRODUCTS |
| WO1995007768A1 (en) * | 1993-09-15 | 1995-03-23 | Societe Europeenne De Propulsion | Method for the production of composite materials or coatings and system for implementing it |
| US5459811A (en) * | 1994-02-07 | 1995-10-17 | Mse, Inc. | Metal spray apparatus with a U-shaped electric inlet gas heater and a one-piece electric heater surrounding a nozzle |
| WO1997036692A1 (en) * | 1996-03-29 | 1997-10-09 | Metalspray, U.S.A., Inc. | Thermal spray systems |
-
1997
- 1997-12-18 DE DE19756594A patent/DE19756594A1/en not_active Withdrawn
-
1998
- 1998-12-11 EP EP98123464A patent/EP0924315B1/en not_active Expired - Lifetime
- 1998-12-11 DE DE59810950T patent/DE59810950D1/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1326116A (en) * | 1970-09-24 | 1973-08-08 | Saviem | Metallising machines |
| DE3543484A1 (en) * | 1985-12-03 | 1987-06-11 | Inst Materialovedenija Akademi | GAS DETONATION SYSTEM FOR COATING PRODUCTS |
| WO1995007768A1 (en) * | 1993-09-15 | 1995-03-23 | Societe Europeenne De Propulsion | Method for the production of composite materials or coatings and system for implementing it |
| US5459811A (en) * | 1994-02-07 | 1995-10-17 | Mse, Inc. | Metal spray apparatus with a U-shaped electric inlet gas heater and a one-piece electric heater surrounding a nozzle |
| WO1997036692A1 (en) * | 1996-03-29 | 1997-10-09 | Metalspray, U.S.A., Inc. | Thermal spray systems |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1200200B1 (en) * | 1999-06-29 | 2004-04-07 | Delphi Technologies, Inc. | Kinetic spray coating method and apparatus |
| EP1321540A1 (en) * | 2000-08-25 | 2003-06-25 | Obschestvo S Organichennoi Otvetstvenoctiju Obninsky Tsentr Poroshkovogo Naplyleniya | Coating method |
| EP1321540A4 (en) * | 2000-08-25 | 2008-02-20 | Obschestvo S Organichennoi Otv | Coating method |
| EP2127759A1 (en) | 2008-05-30 | 2009-12-02 | Linde AG | Cold gas spraying device and method for cold gas spraying |
| DE102008026032A1 (en) | 2008-05-30 | 2009-12-03 | Linde Aktiengesellschaft | Cold gas spraying system and method for cold gas spraying |
| DE102009009474A1 (en) | 2009-02-19 | 2010-08-26 | Linde Ag | High pressure cold gas spray system i.e. cold gas spray gun, has particle supply line whose section facing nozzle i.e. laval nozzle, is extended in direction of symmetry axis of nozzle |
| DE102009009474B4 (en) * | 2009-02-19 | 2014-10-30 | Sulzer Metco Ag | Gas spraying system and method for gas spraying |
| EP2617868A1 (en) * | 2012-01-17 | 2013-07-24 | Linde Aktiengesellschaft | Method and device for thermal spraying |
| US9365918B2 (en) | 2012-01-17 | 2016-06-14 | Linde Aktiengesellschaft | Method and apparatus for thermal spraying |
| WO2016000004A2 (en) | 2014-07-03 | 2016-01-07 | Plansee Se | Method for producing a layer |
| US10415141B2 (en) | 2014-07-03 | 2019-09-17 | Plansee Se | Process for producing a layer |
Also Published As
| Publication number | Publication date |
|---|---|
| DE59810950D1 (en) | 2004-04-15 |
| EP0924315B1 (en) | 2004-03-10 |
| DE19756594A1 (en) | 1999-06-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0911425B1 (en) | Method for thermally coating surfaces | |
| EP0911426B1 (en) | Production of mouldings | |
| EP1382720B1 (en) | Cold gas spraying method and device | |
| DE60210267T2 (en) | DEVICE AND METHOD FOR THE SOLIDAGE APPLICATION AND COMPRESSION OF POWDER PARTICLES BY MEANS OF HIGH SPEED AND THERMALLY PLASTIC FORMING | |
| US5858470A (en) | Small particle plasma spray apparatus, method and coated article | |
| EP0924315B1 (en) | Production of hot gas for thermal spraying | |
| DD259586A5 (en) | METHOD FOR THE PRODUCTION OF DEPRESSED RETRACTABLE COATINGS AND COATING MADE ACCORDING TO THE PROCESS | |
| JPH03226554A (en) | Metal coating of supporting body by electric arc spray and metal coated supporting body | |
| DE19942916A1 (en) | Manufacture of foamable metal bodies and metal foams | |
| DE10224777A1 (en) | High-velocity cold gas particle-spraying process for forming coating on workpiece, intercepts, purifies and collects carrier gas after use | |
| EP0850899B1 (en) | Method of coating carbon or carbon containing nonmetallic substrates and substrate coated thereby | |
| CN110997195A (en) | Method of forming forged structures using cold spray | |
| US20070098913A1 (en) | Method for coating turbine engine components with metal alloys using high velocity mixed elemental metals | |
| Guo et al. | Ablation mechanism of WC-SiC double layer coating under oxyacetylene torch test | |
| EP3314033A1 (en) | Iron-based alloy for the production of thermally applied wear protection layers | |
| EP0911423B1 (en) | Method for joining workpieces | |
| EP0911424B1 (en) | Making of self-supporting composite materials | |
| EP0263469B1 (en) | Method for thermally coating surfaces | |
| DE4244610A1 (en) | ||
| EP0990711B1 (en) | Treatment of surfaces before thermally spray coating them | |
| EP3347505A1 (en) | Method for connecting workpieces and connecting pieces produced by this method | |
| EP2617868A1 (en) | Method and device for thermal spraying | |
| DE19943409A1 (en) | Composite of a composite membrane | |
| DE102005013729A1 (en) | Component used for connecting points of pipelines and connecting elements is made from aluminum with a partial or complete coating partly made from fused soldering particles having a specified degree of melting | |
| WO1989008332A1 (en) | Process and device for depositing layers of a high-temperature superconducting material on substrates |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): CH DE FR GB LI |
|
| AX | Request for extension of the european patent |
Free format text: AL;LT;LV;MK;RO;SI |
|
| 17P | Request for examination filed |
Effective date: 19990914 |
|
| AKX | Designation fees paid |
Free format text: CH DE FR GB LI |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: LINDE TECHNISCHE GASE GMBH |
|
| 17Q | First examination report despatched |
Effective date: 20000922 |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: LINDE GAS AG |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: LINDE AG |
|
| REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
| GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
| GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): CH DE FR GB LI |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP |
|
| REF | Corresponds to: |
Ref document number: 59810950 Country of ref document: DE Date of ref document: 20040415 Kind code of ref document: P |
|
| GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 20040726 |
|
| PLBI | Opposition filed |
Free format text: ORIGINAL CODE: 0009260 |
|
| PLBQ | Unpublished change to opponent data |
Free format text: ORIGINAL CODE: EPIDOS OPPO |
|
| 26 | Opposition filed |
Opponent name: L'AIR LIQUIDE, S.A. A DIRECTOIRE ET CONSEIL DE SUR Effective date: 20040910 |
|
| ET | Fr: translation filed | ||
| PLAX | Notice of opposition and request to file observation + time limit sent |
Free format text: ORIGINAL CODE: EPIDOSNOBS2 |
|
| PLBB | Reply of patent proprietor to notice(s) of opposition received |
Free format text: ORIGINAL CODE: EPIDOSNOBS3 |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: PFA Owner name: LINDE AKTIENGESELLSCHAFT Free format text: LINDE AG#ABRAHAM-LINCOLN-STRASSE 21#65189 WIESBADEN (DE) -TRANSFER TO- LINDE AKTIENGESELLSCHAFT#LEOPOLDSTRASSE 252#80807 MUENCHEN (DE) |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: CA |
|
| PLCK | Communication despatched that opposition was rejected |
Free format text: ORIGINAL CODE: EPIDOSNREJ1 |
|
| PLBN | Opposition rejected |
Free format text: ORIGINAL CODE: 0009273 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: OPPOSITION REJECTED |
|
| 27O | Opposition rejected |
Effective date: 20090128 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20131211 Year of fee payment: 16 Ref country code: CH Payment date: 20131212 Year of fee payment: 16 Ref country code: DE Payment date: 20131204 Year of fee payment: 16 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20131209 Year of fee payment: 16 |
|
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 59810950 Country of ref document: DE |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
| GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20141211 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20150831 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20150701 Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20141231 Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20141231 Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20141211 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20141231 |