EP1048825A1 - Method for applying a wear resistant coating in/on parts of a combustion engine, especially a valve seat - Google Patents

Method for applying a wear resistant coating in/on parts of a combustion engine, especially a valve seat Download PDF

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Publication number
EP1048825A1
EP1048825A1 EP00108215A EP00108215A EP1048825A1 EP 1048825 A1 EP1048825 A1 EP 1048825A1 EP 00108215 A EP00108215 A EP 00108215A EP 00108215 A EP00108215 A EP 00108215A EP 1048825 A1 EP1048825 A1 EP 1048825A1
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Prior art keywords
diamond
metal
combustion engine
valve seat
coating
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EP00108215A
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German (de)
French (fr)
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EP1048825B1 (en
Inventor
Clemens Wallmann
Hans Waldmann
Hans Wilhelm Dr. Bergmann
Horst Dettling
Jürgen Mittrach
Jörg Dr. Wunder
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Bayerische Motoren Werke AG
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Bayerische Motoren Werke AG
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L3/02—Selecting particular materials for valve-members or valve-seats; Valve-members or valve-seats composed of two or more materials
    • F01L3/04—Coated valve members or valve-seats
    • 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
    • C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
    • C23C4/06—Metallic material

Definitions

  • the invention relates to Process for forming a wear-resistant coating in / on components of a Internal combustion engine, in particular valve seat, the coating being diamond material contains.
  • From US 5,040,501 is a method for forming a wear-resistant coating both on a valve seat and on the associated poppet valve known, with each of the components mentioned first in a carbon-containing Atmosphere by supplying energy to the respective component surface Layer of artificial diamonds is created. In a subsequent process step this layer of artificial diamonds is coated with a metal to achieve the required tribological properties.
  • the prior art also includes a diamond material containing coating also known metal-bonded diamond layers, which serve as wear or cutting layers.
  • the production of such coatings usually takes place with electroless or electrolytic deposition processes.
  • Such cutting surfaces are predominantly sintered manufactured.
  • the invention has for its object to develop the generic method so that in / on components of an internal combustion engine are highly wear-resistant, heat-dissipating and mechanically resistant coatings with relative less effort can be achieved.
  • thermal conductivity of diamond or diamond particles reference is made to the EP 0 364 155 A2, according to which, for example, in a copper or aluminum matrix embedded diamond particles serve as a heat dissipation device.
  • a powdered braze is used as a metal matrix.
  • a powdered braze is used as a braze type Metal matrix.
  • the diamond particles of D 1 ⁇ m - 15 ⁇ m in a volume fraction of 10 - 60% are added, the Titanium content between 5 - 15% by weight.
  • a respective diamond metal powder on a surface area of the respective component is further proposed according to the invention that the diamond metal powder under a protective gas atmosphere an area of exposure of a high-energy beam on the surface of each component is fed.
  • the application can be designed such that the Diamond metal powder a melted surface area of each Component is fed to form a thermally integral material composite.
  • Another variant of the order provides, according to the invention, that the diamond metal powder by means of a polymeric binder in a surface area of the Component applied and then after the chemical and / or thermal Final bonding around the surface by means of a high-energy beam becomes.
  • the invention can be used in various ways in / on components of an internal combustion engine Find use.
  • the invention is preferably on a valve seat in a cylinder head made of a light metal.
  • Another use of the invention results for valve train parts, for example the armouring of a poppet valve as well as the sliding surfaces of the valve lever and control cam.
  • the invention is also for tribological sliding surfaces in a crank mechanism of an internal combustion engine applicable.
  • the invention can also be worn or repaired damaged surface areas of metal components.
  • a use of the invention is based on one shown in the drawing Valve seat in a cylinder head made of a light metal for an internal combustion engine described.
  • a cross-flow cylinder head 1 only shown schematically, for one not shown Internal combustion engine is made of an aluminum alloy and has an inlet channel 2 and a diametrically arranged outlet channel 3.
  • the Gas exchange channels 2 and 3 are controlled by means of poppet valves, not shown.
  • a valve seat 4 is assigned to each channel 2, 3 for each poppet valve on the combustion chamber side.
  • Each valve seat 4 is initially in its geometric design by a machining process directly in the edge area of each gas exchange channel 2, 3 formed in the cylinder head 1.
  • each valve seat 4 according to the invention with a Diamond-metal composite coated, coating 5.
  • the diamond-metal composite material provided for coating the valve seats 4 preferably comprises a braze-like metal matrix made of a copper-titanium compound, each of the metals mentioned first being pulverized and the both metal powders mixed together or mechanically or thermally alloyed or be alloyed.
  • This copper-titanium powder contains diamond particles a grain size of, for example, 5 ⁇ m in a volume fraction of for example 45% added, the titanium content between 5 - 15% Parts by weight.
  • This diamond metal powder is under a protective gas atmosphere, for example Argon atmosphere, in one by a high-energy beam, for example of a laser, melting produced in the surface area of a valve seat 4 introduced for the thermal material connection with the base material of the cylinder head 1.
  • the coating 5 is applied continuously, where e.g. the cylinder head 1 about the axis of the respective poppet valve respective valve seat 4 rotates or a corresponding beam guide is selected.
  • This copper-titanium compound mixed with diamond particles can be advantageous Way without an intermediate layer on a light metal component, e.g. one Cylinder head, are applied, whereby a simpler process is achieved.
  • a light metal component e.g. one Cylinder head
  • the final shape of the coated valve seat 4 is carried out by grinding and / or polishing.
  • the preferred ones are used Metals copper and titanium also pulverized, which is a polymeric binder is added.
  • This metal powder can diamond particles in the aforementioned Size and in the aforementioned volume proportion are added.
  • This diamond metal powder thus formed is in a surface area when applied of the component held on the surface by means of the polymeric binder, the applied coating after a chemical and / or thermal Debinding by means of an energy beam - electron beam or Laser - is remelted / melted on the surface to form the adherent Coating 5 on cylinder head 1.

Abstract

Wear resistant coating formation in and/or on an IC engine component, using a diamond-metal composite material, is new.

Description

Die Erfindung bezieht sich nach dem Oberbegriff des Patentanspruches 1 auf ein Verfahren zur Ausbildung einer verschleißfesten Beschichtung in/an Bauteilen einer Brennkraftmaschine, insbesondere Ventilsitz, wobei die Beschichtung Diamant-Material enthält.According to the preamble of claim 1, the invention relates to Process for forming a wear-resistant coating in / on components of a Internal combustion engine, in particular valve seat, the coating being diamond material contains.

Aus der US 5,040,501 ist ein Verfahren zur Ausbildung einer verschleißfesten Beschichtung sowohl auf einem Ventilsitz als auch auf dem zugehörigen Tellerventil bekannt, wobei bei jedem der genannten Bauteile zunächst in einer kohlenstoffhaltigen Atmosphäre mittels Energiezufuhr auf der jeweiligen Bauteil-Oberfläche eine Schicht künstlicher Diamanten erzeugt wird. In einem anschließenden Verfahrensschritt wird diese Schicht aus künstlichen Diamanten mit einem Metall beschichtet zur Erzielung der erforderlichen tribologischen Eigenschaften.From US 5,040,501 is a method for forming a wear-resistant coating both on a valve seat and on the associated poppet valve known, with each of the components mentioned first in a carbon-containing Atmosphere by supplying energy to the respective component surface Layer of artificial diamonds is created. In a subsequent process step this layer of artificial diamonds is coated with a metal to achieve the required tribological properties.

Dieses bekannte Verfahren ist in nachteiliger Weise aufwendig, wobei als weiterer Nachteil die relativ dünnen, nur einige Atomlagen dicken Schichten zu nennen sind, die bei einer starken elastischen oder plastischen Verformung des Bauteiluntergrundes geschädigt werden. This known method is disadvantageously complex, being another Disadvantage: the relatively thin layers, which are only a few atomic layers thick, in the case of a strong elastic or plastic deformation of the component base be harmed.

Weiter sind im Stand der Technik neben der vorbeschriebenen, ein Diamant-Material enthaltenden Beschichtung auch metallgebundene Diamantschichten bekannt, die als Verschleiß- oder Schneidschichten dienen. Die Herstellung derartiger Beschichtungen erfolgt üblicherweise mit stromlosen oder elektrolytischen Abscheidungsverfahren. Derartige Schneidbeläge werden dagegen überwiegend sintertechnisch hergestellt.In addition to the one described above, the prior art also includes a diamond material containing coating also known metal-bonded diamond layers, which serve as wear or cutting layers. The production of such coatings usually takes place with electroless or electrolytic deposition processes. Such cutting surfaces, on the other hand, are predominantly sintered manufactured.

Der Erfindung liegt die Aufgabe zugrunde, das gattungsgemäße Verfahren so weiterzubilden, dass in/an Bauteilen einer Brennkraftmaschine hoch verschleißfeste, wärmeableitende und mechanisch widerstandsfähige Beschichtungen mit relativ geringerem Aufwand erzielt werden.The invention has for its object to develop the generic method so that in / on components of an internal combustion engine are highly wear-resistant, heat-dissipating and mechanically resistant coatings with relative less effort can be achieved.

Diese Aufgabe ist mit dem Patentanspruch 1 dadurch gelöst, dass zur Beschichtung ein Diamant-Metall-Verbundwerkstoff verwendet wird.This object is achieved with claim 1 in that for coating a diamond metal composite is used.

Der Vorteil der erfindungsgemäßen Verwendung eines Diamant-Metall-Verbundwerkstoffes in/an Bauteilen einer Brennkraftmaschine ist darin zu sehen, dass mit der Wahl der jeweiligen Metallkomponenten einerseits und dem Anteil an künstlichen oder natürlichen Diamanten andererseits von vorbestimmten Korngrößen die Parameter für eine hohe Verschleißfestigkeit, eine gute Wärmeableitung sowie eine mechanisch widerstandsfähige Ausbildung gut einzustellen sind.The advantage of using a diamond-metal composite according to the invention in / on components of an internal combustion engine can be seen in that with the choice of the respective metal components on the one hand and the proportion of artificial ones or natural diamonds, on the other hand, of predetermined grain sizes Parameters for high wear resistance, good heat dissipation and a mechanically resistant training are easy to adjust.

Die Erlangung der vorgenannten Ziele wird in einer ersten Ausgestaltung der Erfindung vorteilhaft dadurch unterstützt, dass ein Diamant-Metall-Verbundwerkstoff thermisch mit einer vorgeformten Bauteil-Oberfläche stoffschlüssig verbunden wird.The attainment of the above-mentioned goals is in a first embodiment of the invention advantageously supported by a diamond-metal composite is thermally bonded to a preformed component surface.

Damit ist in vorteilhafter Weise ein stoffschlüssiger Werkstoffverbund zwischen dem Grundmaterial des Bauteiles und der Beschichtung erzielt, wobei mit den erfindungsgemäß verwendeten metallgebundenen Diamantschichten die charakteristischen Eigenschaften von Diamant, wie z.B. die hohe Härte, die hohe thermische Leitfähigkeit und die guten tribologischen Eigenschaftsmerkmale mit den bekannten Vorzügen von metallischen Werkstoff vorteilhaft vereint werden. This is advantageously a material bond between the Base material of the component and the coating achieved, with the invention metal-bonded diamond layers used the characteristic Properties of diamond, such as the high hardness, the high thermal Conductivity and the good tribological properties with the known Advantages of metallic material can be advantageously combined.

Bezüglich der Wärmeleitfähigkeit von Diamant bzw. Diamantpartikeln wird auf die EP 0 364 155 A2 verwiesen, gemäß der beispielsweise in eine Kupfer- oder Aluminium-Matrix eingebettete Diamantpartikel als Wärmeableitungseinrichtung dienen.With regard to the thermal conductivity of diamond or diamond particles, reference is made to the EP 0 364 155 A2, according to which, for example, in a copper or aluminum matrix embedded diamond particles serve as a heat dissipation device.

In weiterer Ausgestaltung der Erfindung wird vorgeschlagen, dass mindestens zwei unterschiedliche Metalle pulverisiert werden und die Metallpulver miteinander gemischt oder mechanisch oder thermisch legiert oder vorlegiert oder den Pulvern ein nicht metallischer Binder zugesetzt wird und den zusammengeführten Metallpulvern Diamantpartikel in der Korngröße von D = 1 µm - D = 100 µm zugesetzt werden in einem Volumenanteil von 10 - 60 %.In a further embodiment of the invention it is proposed that at least two different metals are pulverized and the metal powder mixed together or mechanically or thermally alloyed or pre-alloyed or the powders non-metallic binder is added and the merged metal powders Diamond particles with a grain size of D = 1 µm - D = 100 µm are added in a volume share of 10 - 60%.

Mit den vorbeschriebenen Komponenten zur Ausbildung eines Diamant-Metall-Verbundwerkstoffes ist bei der thermisch stoffschlüssigen Verbindung mit dem Grundmaterial des jeweiligen Bauteiles insbesondere mit dem Volumenanteil an Diamantpartikeln sichergestellt, dass deren Traganteil nicht nur in der tribologischen Fläche der Beschichtung ausreichend hoch ist, sondern auch deren Verteilung in der Beschichtung zur gewünschten Wärmeabführung in das Grundmaterial des Bauteiles.With the components described above for the formation of a diamond-metal composite is the thermally integral connection with the base material of the respective component, in particular with the volume fraction Diamond particles ensure that their load share is not only in the tribological Surface of the coating is sufficiently high, but also its distribution in the coating for the desired heat dissipation in the base material of the Component.

In Weiterbildung der Erfindung wird ferner vorgeschlagen, dass als eine Metallmatrix ein pulverisiertes Hartlot verwendet wird. Vorzugsweise dient als eine hartlotartige Metallmatrix eine Kupfer-Titan-Verbindung, der Diamantpartikel von D = 1 µm - 15 µm in einem Volumenanteil von 10 - 60 % zugesetzt werden, wobei der Titananteil zwischen 5 - 15 % Gewichtsanteile beträgt.In a further development of the invention it is further proposed that as a metal matrix a powdered braze is used. Preferably serves as a braze type Metal matrix is a copper-titanium compound, the diamond particles of D = 1 µm - 15 µm in a volume fraction of 10 - 60% are added, the Titanium content between 5 - 15% by weight.

Für den Auftrag eines jeweiligen Diamant-Metall-Pulvers auf einen Oberflächenbereich des jeweiligen Bauteiles wird weiter erfindungsgemäß vorgeschlagen, dass das Diamant-Metall-Pulver unter einer Schutzgasatmosphäre einem Einwirkungsbereich eines energiereichen Strahles auf die Oberfläche eines jeweiligen Bauteiles zugeführt wird. For the application of a respective diamond metal powder on a surface area of the respective component is further proposed according to the invention that the diamond metal powder under a protective gas atmosphere an area of exposure of a high-energy beam on the surface of each component is fed.

Im einzelnen kann die Aufbringung beispielsweise so gestaltet sein, dass das Diamant-Metall-Pulver einem aufgeschmolzenen Oberflächenbereich des jeweiligen Bauteiles zugeführt wird zur Ausbildung eines thermisch stoffschlüssigen Werkstoff-Verbundes.In particular, the application can be designed such that the Diamond metal powder a melted surface area of each Component is fed to form a thermally integral material composite.

Eine andere Variante des Auftrages sieht erfindungsgemäß vor, dass das Diamant-Metall-Pulver mittels eines polymeren Binders in einem Oberflächenbereich des Bauteiles aufgetragen und anschließend nach der chemischen und/oder thermischen Endbinderung mittels eines energiereichen Strahles auf der Oberfläche um/aufgeschmolzen wird.Another variant of the order provides, according to the invention, that the diamond metal powder by means of a polymeric binder in a surface area of the Component applied and then after the chemical and / or thermal Final bonding around the surface by means of a high-energy beam becomes.

Die Erfindung kann in vielfältiger Weise in/an Bauteilen einer Brennkraftmaschine Verwendung finden. So ist die Erfindung bevorzugt an einem Ventilsitz in einem Zylinderkopf aus einem Leichtmetall verwendet. Eine weitere Verwendung der Erfindung ergibt sich für Ventiltriebteile, beispielsweise die Panzerung eines Tellerventiles sowie die Gleitflächen von Ventilhebel und Steuernocken. Die Erfindung ist aber auch für tribologische Gleitflächen in einem Kurbeltrieb einer Brennkraftmaschine einsetzbar. Schließlich kann die Erfindung auch zur Reparatur verschlissener oder beschädigter Oberflächenbereiche metallener Bauteile Verwendung finden.The invention can be used in various ways in / on components of an internal combustion engine Find use. Thus, the invention is preferably on a valve seat in a cylinder head made of a light metal. Another use of the invention results for valve train parts, for example the armouring of a poppet valve as well as the sliding surfaces of the valve lever and control cam. But the invention is also for tribological sliding surfaces in a crank mechanism of an internal combustion engine applicable. Finally, the invention can also be worn or repaired damaged surface areas of metal components.

Eine Verwendung der Erfindung ist anhand eines in der Zeichnung dargestellten Ventilsitzes in einem Zylinderkopf aus einem Leichtmetall für eine Brennkraftmaschine beschrieben.A use of the invention is based on one shown in the drawing Valve seat in a cylinder head made of a light metal for an internal combustion engine described.

Ein lediglich schematisch dargestellter Querstrom-Zylinderkopf 1 für eine nicht gezeigte Brennkraftmaschine ist aus einer Aluminiumlegierung gefertigt und weist einen Einlasskanal 2 sowie einen diametral angeordneten Auslasskanal 3 auf. Die Gaswechselkanäle 2 und 3 werden mittels nicht gezeigter Tellerventile gesteuert. Für jedes Tellerventil ist jedem Kanal 2, 3 brennraumseitig ein Ventilsitz 4 zugeordnet. A cross-flow cylinder head 1, only shown schematically, for one not shown Internal combustion engine is made of an aluminum alloy and has an inlet channel 2 and a diametrically arranged outlet channel 3. The Gas exchange channels 2 and 3 are controlled by means of poppet valves, not shown. A valve seat 4 is assigned to each channel 2, 3 for each poppet valve on the combustion chamber side.

Jeder Ventilsitz 4 ist in seiner geometrischen Ausbildung zunächst durch ein spanabhebendes Verfahren unmittelbar im Randbereich jedes Gaswechselkanals 2, 3 im Zylinderkopf 1 ausgebildet.Each valve seat 4 is initially in its geometric design by a machining process directly in the edge area of each gas exchange channel 2, 3 formed in the cylinder head 1.

Zur Erzielung eines hoch verschleißfesten, gut wärmeableitenden und mechanisch widerstandsfähigen Ventilsitzes 4 wird jeder Ventilsitz 4 erfindungsgemäß mit einem Diamant-Metall-Verbundwerkstoff beschichtet, Beschichtung 5.To achieve a highly wear-resistant, good heat-dissipating and mechanical resistant valve seat 4, each valve seat 4 according to the invention with a Diamond-metal composite coated, coating 5.

Der für die Beschichtung der Ventilsitze 4 vorgesehene Diamant-Metall-Verbundwerkstoff umfasst vorzugsweise eine hartlotartige Metallmatrix aus einer Kupfer-Titan-Verbindung, wobei jedes der genannten Metalle zunächst pulverisiert und die beiden Metallpulver miteinander gemischt oder mechanisch oder thermisch legiert oder vorlegiert werden. Diesem Kupfer-Titan-Pulver werden Diamantpartikel mit einer Korngröße von beispielsweise 5 µm in einem Volumenanteil von beispielsweise 45 % zugesetzt, wobei der Titananteil zwichen 5 - 15 % Gewichtsanteile beträgt.The diamond-metal composite material provided for coating the valve seats 4 preferably comprises a braze-like metal matrix made of a copper-titanium compound, each of the metals mentioned first being pulverized and the both metal powders mixed together or mechanically or thermally alloyed or be alloyed. This copper-titanium powder contains diamond particles a grain size of, for example, 5 µm in a volume fraction of for example 45% added, the titanium content between 5 - 15% Parts by weight.

Dieses Diamant-Metall-Pulver wird unter einer Schutzgasatmosphäre, beispielsweise Argon-Atmosphäre, in eine durch einen energiereichen Strahl, beispielsweise eines Lasers, im Oberflächenbereich eines Ventilsitzes 4 erzeugte Aufschmelzung eingebracht zur thermisch stoffschlüssigen Werkstoffverbindung mit dem Grundmaterial des Zylinderkopfes 1. Die Auftragung der Beschichtung 5 erfolgt kontinuierlich, wobei z.B. der Zylinderkopf 1 um die Achse des jeweiligen Tellerventils zum jeweiligen Ventilsitz 4 rotiert oder eine entsprechende Strahlführung gewählt wird.This diamond metal powder is under a protective gas atmosphere, for example Argon atmosphere, in one by a high-energy beam, for example of a laser, melting produced in the surface area of a valve seat 4 introduced for the thermal material connection with the base material of the cylinder head 1. The coating 5 is applied continuously, where e.g. the cylinder head 1 about the axis of the respective poppet valve respective valve seat 4 rotates or a corresponding beam guide is selected.

Diese mit Diamantpartikel versetzte Kupfer-Titan-Verbindung kann in vorteilhafter Weise ohne eine Zwischenschicht auf einem Leichtmetall-Bauteil, wie z.B. einem Zylinderkopf, aufgebracht werden, wodurch ein einfacheres Verfahren erzielt ist.This copper-titanium compound mixed with diamond particles can be advantageous Way without an intermediate layer on a light metal component, e.g. one Cylinder head, are applied, whereby a simpler process is achieved.

Die endgültige Formgebung des beschichteten Ventilsitzes 4 erfolgt mittels Schleifen und/oder Polieren. The final shape of the coated valve seat 4 is carried out by grinding and / or polishing.

Bei einer anderen Art des Auftrages der Beschichtung werden die bevorzugt verwendeten Metalle Kupfer und Titan ebenfalls pulverisiert, denen ein polymerer Binder beigemischt wird. Diesem Metallpulver können Diamantpartikel in der vorerwähnten Größe und im vorerwähnten Volumenanteils zugesetzt werden. Dieses so gebildete Diamant-Metall-Pulver ist beim Auftrag in einem Oberflächenbereich des Bauteiles mittels des polymeren Binders an der Oberfläche gehalten, wobei die aufgetragene Beschichtung anschließend nach einer chemischen und/oder thermischen Entbinderung mittels eines energiereichen Strahles - Elektronenstrahl oder Laser - auf der Oberfläche um-/aufgeschmolzen wird zur Bildung der festhaftenden Beschichtung 5 am Zylinderkopf 1.In another type of application of the coating, the preferred ones are used Metals copper and titanium also pulverized, which is a polymeric binder is added. This metal powder can diamond particles in the aforementioned Size and in the aforementioned volume proportion are added. This diamond metal powder thus formed is in a surface area when applied of the component held on the surface by means of the polymeric binder, the applied coating after a chemical and / or thermal Debinding by means of an energy beam - electron beam or Laser - is remelted / melted on the surface to form the adherent Coating 5 on cylinder head 1.

Zur vorteilhaften metallischen Benetzung der Diamantpartikel können außer Titan jeweils auch Vanadium, Chrom oder Zirkon in Verbindung mit Kupfer zur Anwendung kommen.For the advantageous metallic wetting of the diamond particles, besides titanium also vanadium, chrome or zirconium in combination with copper Application come.

Claims (13)

Verfahren zur Ausbildung einer verschleißfesten Beschichtung in/an Bauteilen einer Brennkraftmaschine, insbesondere Ventilsitz, wobei die Beschichtung Diamant-Material enthält, dadurch gekennzeichnet, dass zur Beschichtung ein Diamant-Metall-Verbundwerkstoff verwendet wird. Method for forming a wear-resistant coating in / on components of an internal combustion engine, in particular valve seat, wherein the coating contains diamond material, characterized in that that a diamond-metal composite is used for coating. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass ein Diamant-Metall-Verbundwerkstoff thermisch mit einer vorgeformten Bauteil-Oberfläche stoffschlüssig verbunden wird.A method according to claim 1, characterized in that a diamond-metal composite is thermally bonded to a preformed component surface. Verfahren nach Anspruch 1 und 2, dadurch gekennzeichnet, dass mindestens zwei unterschiedliche Metalle pulverisiert werden und die Metallpulver miteinander gemischt oder mechanisch oder thermisch legiert oder vorlegiert oder den Pulvern ein nicht metallischer Binder zugesetzt wird und den zusammengeführten Metallpulvern Diamantpartikel in der Korngröße von D = 1 µm - 100 µm zugesetzt werden in einem Volumenanteil von 10 - 60 %. A method according to claim 1 and 2, characterized in that at least two different metals are pulverized and the metal powders are mixed with one another or mechanically or thermally alloyed or pre-alloyed or a non-metallic binder is added to the powders and Diamond particles with a grain size of D = 1 µm - 100 µm are added to the combined metal powders in a volume fraction of 10 - 60%. Verfahren nach den Ansprüchen 1 bis 3, dadurch gekennzeichnet, dass als eine Metallmatrix ein pulverisiertes Hartlot verwendet wird.Method according to claims 1 to 3, characterized in that a powdered braze is used as a metal matrix. Verfahren nach den Ansprüchen 1 bis 4, dadurch gekennzeichnet, dass als hartlotartige Metallmatrix eine Kupfer-Titan-Verbindung dient, der Diamantpartikel von D = 1 µm - 15 µm in einem Volumenanteil von 10 - 60 % zugesetzt werden, wobei der Titananteil zwischen 5 - 15 % Gewichtsanteile beträgt. Method according to claims 1 to 4, characterized in that that a copper-titanium compound serves as the braze-like metal matrix Diamond particles of D = 1 µm - 15 µm in a volume fraction of 10 - 60% are added, whereby the titanium content is between 5 - 15% by weight. Verfahren nach den Ansprüchen 1 bis 5, dadurch gekennzeichnet, dass das Diamant-Metall-Pulver unter einer Schutzgasatmosphäre einem Einwirkungsbereich eines energiereichen Strahles auf die Oberfläche eines jeweiligen Bauteiles zugeführt wird.Method according to claims 1 to 5, characterized in that the diamond-metal powder is supplied under an inert gas atmosphere to an area of action of a high-energy jet on the surface of a respective component. Verfahren nach Anspruch 6, dadurch gekennzeichnet, dass das Diamant-Metall-Pulver einem aufgeschmolzenen Oberflächenbereich zugeführt wird.A method according to claim 6, characterized in that the diamond metal powder is supplied to a melted surface area. Verfahren nach Anspruch 3 und 6, dadurch gekennzeichnet, dass das Diamant-Metall-Pulver mittels eines polymeren Binders in einem Oberflächenbereich des Bauteiles aufgetragen und anschließend nach einer chemischen und/oder thermischen Entbinderung mittels eines energiereichen Strahles auf der Oberfläche um/aufgeschmolzen wird. A method according to claim 3 and 6, characterized in that the diamond metal powder is applied by means of a polymeric binder in a surface area of the component and then after a chemical and / or thermal debinding by means of a high-energy beam is melted around / on the surface. Verfahren nach einem oder mehreren der Ansprüche 1 bis 8, gekennzeichnet durch die Verwendung für einen Ventilsitz in einem Brennkraftmaschinen-Zylinderkopf aus einem Leichtmetall. Method according to one or more of claims 1 to 8, characterized by the use for a valve seat in an internal combustion engine cylinder head made of a light metal. Verfahren nach einem oder mehreren der Ansprüche 1 bis 8, gekennzeichnet durch die Verwendung für Ventiltriebteile, wie Ventilpanzerung, Ventilhebel, Steuernocken.Method according to one or more of claims 1 to 8, characterized by the use for valve train parts, such as valve armor, valve lever, control cams. Verfahren nach einem oder mehreren der Ansprüche 1 bis 8, gekennzeichnet durch die Verwendung im Kurbeltrieb einer Brennkraftmaschine für tribologische Gleitflächen.Method according to one or more of claims 1 to 8, characterized by the use in the crank mechanism of an internal combustion engine for tribological sliding surfaces. Verfahren nach einem oder mehreren der Ansprüche 1 bis 8, gekennzeichnet durch die Verwendung für Reparaturen verschlissener oder beschädigter Oberflächenbereiche.Method according to one or more of claims 1 to 8, characterized by the use for repairs of worn or damaged surface areas. Verfahren nach einem oder mehreren der Ansprüche 1 bis 12, dadurch gekennzeichnet, dass ein Diamant-Metall-Verbundwerkstoff auf der Basis von Kupfer Titan oder Vanadium oder Chrom oder Zirkon enthält.Method according to one or more of claims 1 to 12, characterized in that a diamond-metal composite based on copper contains titanium or vanadium or chromium or zircon.
EP00108215A 1999-04-26 2000-04-14 Method for applying a wear resistant coating in/on parts of a combustion engine, especially a valve seat Expired - Lifetime EP1048825B1 (en)

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DE19918813 1999-04-26
DE19918813 1999-04-26

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WO2005047660A1 (en) * 2003-11-15 2005-05-26 Daimlerchrysler Ag Internal combustion engine component and method for the production thereof
DE102018212909A1 (en) * 2018-08-02 2020-02-06 Ford Global Technologies, Llc Method for forming a valve seat of a cylinder head, and valve seat area of the cylinder head processed with the method
DE102019123456A1 (en) * 2019-09-02 2021-03-04 Federal-Mogul Valvetrain Gmbh DISC VALVE WITH CORE AND PROCESS FOR THEIR PRODUCTION

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WO1998015672A1 (en) * 1995-10-05 1998-04-16 Blz Bayerisches Laserzentrum Gemeinnützige Forsch Ungsgesellschaft Mbh Process and device for manufacturing a cutting tool

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005047660A1 (en) * 2003-11-15 2005-05-26 Daimlerchrysler Ag Internal combustion engine component and method for the production thereof
DE102018212909A1 (en) * 2018-08-02 2020-02-06 Ford Global Technologies, Llc Method for forming a valve seat of a cylinder head, and valve seat area of the cylinder head processed with the method
DE102018212909B4 (en) 2018-08-02 2022-12-29 Ford Global Technologies, Llc Method for forming a valve seat of a cylinder head, and valve seat area of the cylinder head machined with the method
DE102019123456A1 (en) * 2019-09-02 2021-03-04 Federal-Mogul Valvetrain Gmbh DISC VALVE WITH CORE AND PROCESS FOR THEIR PRODUCTION

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ES2228329T3 (en) 2005-04-16
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