EP1322794B1 - Revetement applique par voie thermique, destine a des segments de piston et constitue de poudres alliees mecaniquement - Google Patents

Revetement applique par voie thermique, destine a des segments de piston et constitue de poudres alliees mecaniquement Download PDF

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Publication number
EP1322794B1
EP1322794B1 EP01976101A EP01976101A EP1322794B1 EP 1322794 B1 EP1322794 B1 EP 1322794B1 EP 01976101 A EP01976101 A EP 01976101A EP 01976101 A EP01976101 A EP 01976101A EP 1322794 B1 EP1322794 B1 EP 1322794B1
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Prior art keywords
piston ring
wear
ring according
resistant coating
coating
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Expired - Lifetime
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EP01976101A
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German (de)
English (en)
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EP1322794A2 (fr
Inventor
Christian Herbst-Dederichs
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Federal Mogul Burscheid GmbH
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Federal Mogul Burscheid GmbH
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/10—Alloys containing non-metals
    • C22C1/1084—Alloys containing non-metals by mechanical alloying (blending, milling)
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/922—Static electricity metal bleed-off metallic stock
    • Y10S428/9335—Product by special process
    • Y10S428/937—Sprayed metal
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49274—Piston ring or piston packing making
    • Y10T29/49281—Piston ring or piston packing making including coating or plating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12014—All metal or with adjacent metals having metal particles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12014—All metal or with adjacent metals having metal particles
    • Y10T428/12028—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, etc.]
    • Y10T428/12063—Nonparticulate metal component
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12014—All metal or with adjacent metals having metal particles
    • Y10T428/1216—Continuous interengaged phases of plural metals, or oriented fiber containing
    • Y10T428/12174—Mo or W containing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12806—Refractory [Group IVB, VB, or VIB] metal-base component
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12806—Refractory [Group IVB, VB, or VIB] metal-base component
    • Y10T428/12826—Group VIB metal-base component
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12806—Refractory [Group IVB, VB, or VIB] metal-base component
    • Y10T428/12826—Group VIB metal-base component
    • Y10T428/12847—Cr-base component

Definitions

  • the present invention relates to piston rings in internal combustion engines with a wear-resistant coating on the running surfaces and flanks of the piston rings.
  • the wear-resistant coating according to the invention is obtained by mechanical alloying of powders which form a metallic matrix with hard as well as lubricant dispersoids. The coating is then applied thermally to the running surfaces and flank parts of piston rings in internal combustion engines, in particular by means of high-speed flame spraying (HVOF).
  • HVOF high-speed flame spraying
  • the invention is therefore particularly concerned with the production and composition of coatings of mechanically alloyed powders having tribologically optimum properties as starting materials for the purpose of coating piston ring treads by means of thermal processes, e.g. by means of the thermal spraying and with the coatings resulting from the mentioned powders on e.g. Piston rings of internal combustion engines.
  • Piston rings are subject by their constant engagement with the cylinder bore a constant sliding wear. This manifests itself in both abrasive abrasion of the piston ring surface or its coating as well as partial transfer of material from the cylinder surface to the piston ring raceway and vice versa.
  • adapted coatings it is possible to reduce these negative influences.
  • particle-reinforced hard chrome coatings show significantly better abrasion resistance than uncoated or nitrided rings (see EP 217126 B1 ), but also as conventional hard chrome layers and molybdenum-based plasma spray layers. Nevertheless, these coatings also come within the limit of their performance due to the increasing pressure and temperature parameters in modern internal combustion engines.
  • Ceramics are suitable as materials in principle to fulfill this task. They have excellent abrasion resistance and because of their non-metallic bonding character over a very low tendency to adhesion to metal alloys.
  • Ceramics can also be applied directly to piston rings by various coating methods. So they can e.g. deposited by vapor deposition (PVD or CVD) directly.
  • PVD vapor deposition
  • CVD chemical vapor deposition
  • Plasma spraying leads to relatively high application rates, but these coatings are generally subject to tensile stresses, as a result of which they are susceptible to tearing and breakage. This is especially reinforced by the very brittle nature of the ceramics themselves.
  • Nano-oxidically reinforced metals should therefore be sprayed primarily by means of high-speed flame spraying (HVOF).
  • HVOF high-speed flame spraying
  • Such a composite principle is already being implemented today.
  • powdered hard metals (WC-Co) or cermets (NiCr-CrC) are processed by means of thermal coating processes to layers.
  • the basis for this is either a powder mixture or a composite powder.
  • mechanical mixtures usually provide the lowest layer qualities, since the composite formation takes place here only in the coating process and the hard materials must be relatively large due to their required flowability.
  • Composite powders are usually produced by agglomeration into so-called micropellets. In this process, microfine starting powders become processable in a spray-drying process, i. processed primarily free-flowing powders.
  • composite powder production is the mixing of the components with subsequent sintering to the block.
  • the powder is recovered here by breaking and grinding the block.
  • composite powders are enveloped, e.g. a hard material powder by a metallic element chemically or physically coated, or so-called cladding - this fine metal powders are glued to the hard core in the spray-drying process - produced.
  • Characteristic of the production of conventional composite powders is that compound formation in the powder usually requires a sintering process, since the powders can otherwise disintegrate in the coating processes into their starting constituents and the advantageous composite effect in the layer is lost. This is all the more important as the processing forces become stronger during the coating. These are very high, especially in the high speed spray processes where the powders are processed in a supersonic gas stream. Furthermore, an optimal connection between ceramic and metallic binder phase is necessary to fulfill the tribological task, which is achieved in particular by a chemical-metallic compound.
  • a disadvantage of the required sintering is that on the one hand the efficiency of the powder is reduced, on the other hand, a sinterability of the starting components is required. This is especially the combination WC-Co available, but is not given in the interesting from economic and tribological point of view combination of eg metallic binder and oxide ceramic hard materials. Therefore, such powders for the thermal coating of piston ring raceways could not be successfully used.
  • JP 62-99449 discloses a thermal spray powder containing 75 wt% Cr 3 C 2 , 2 wt% Ni, 19 wt% Cr, and 4 wt% Al 2 O 3 .
  • the particle diameter of the Al 2 O 3 is in this case 10 microns.
  • EP 0 559 229 A1 discloses the production of a thermal spray powder by milling 2264 g of a powder of Co-30Ni-20Cr-8A1-0.5Y alloy in an attritor mill with 251 g of 1 ⁇ m Al 2 O 3 dispersoids.
  • the composite powder used in this document is a mixture of carbides, metal powders and solid lubricants, which is processed into a self-lubricating composite layer by a high-speed flame spraying process.
  • the composite particles of CrC and NiCr are mixed with the solid lubricants.
  • a disadvantage of this type of production of the composite powder according to DE 197 00 835 A1 is that to obtain the necessary flowability, as a condition for processing in the high-speed flame spraying process, relatively coarse-grained particles must be formed.
  • the particle size of the solid lubricant particles must be> 20 ⁇ m, so that the composite powder has the flowability required for spraying in the high-speed flame spraying process.
  • These coarse particles cause a concentrated accumulation of solid lubricant phases in the coating, which in turn has a negative effect on the wear, since the coarse and thus relatively large solid lubricant areas can break out and are only selectively available due to their size as a lubricant.
  • the starting powders are mechanically alloyed, in particular in attritors, hammer or ball mills.
  • starting powders are crushed small and at the same time kneaded into one another, so that a composite powder is formed even without sintering.
  • non-sinterable material combinations such as metals and oxides can be processed into composite powders.
  • This technology is used, for example, industrially for the production of so-called ODS alloys for high-temperature applications, where approximately 2% by weight of nanodimensionally sized oxides are added to the metallic matrix.
  • the invention therefore relates to piston rings with coatings of treads and flanks.
  • the starting powders used according to the invention have a suitable particle size.
  • particle sizes preferably particle sizes of 5-80 ⁇ m, more preferably 5-60 ⁇ m, are used.
  • the starting powder consists of a metallic matrix and at least one ceramic phase for increasing the wear resistance of the metallic matrix.
  • the ceramic phases in the starting powder or in the finished coating have a diameter of ⁇ 10 .mu.m. Preferably, they have size ranges from a few nanometers to a few micrometers.
  • the metallic matrix of the starting powder and the coating comprise in particular alloys based on iron, nickel, chromium, cobalt, molybdenum.
  • the starting powder may consist of a metallic matrix and at least one solid lubricant phase to improve the lubricating properties of the matrix.
  • the solid lubricant phase in the starting powder has particle sizes ⁇ 20 .mu.m, preferably ⁇ 10 .mu.m.
  • solid lubricant particles for example, those of graphite, hexagonal boron nitride or polytetrafluoroethylene can be used.
  • hard material particles for example from the group of tungsten carbide, chromium carbide, aluminum oxide, silicon carbide, boron carbide, titanium carbide and / or diamond, into the material according to the invention.
  • the mechanical alloying allows two major advantages over all other powder manufacturing methods while maintaining economic advantages.
  • composite materials such as metal + oxide ceramics and metal + diamond can be produced relatively easily for subsequent coating-related processing by means of thermal processes.
  • the contents of hard materials in the metal matrix can be well over 50% by volume, which allows the properties of the hard material phases to be utilized significantly better than at the low contents which are achieved today, for example, with galvanic chromium dispersion coatings.
  • virtually any desired fine and homogeneously distributed hard material phases can be produced in the arbitrarily assembled metal matrix.
  • both the matrix can be specifically optimized for abrasion and fire resistance as well as fulfill a specific proportion of larger hard phases purely tribological tasks.
  • the starting materials are filled into the mill and the grinding process is started.
  • the powders are broken or deformed by impact processes, which are generated either by the balls contained in the mixer or by contact with the chamber walls, depending on the deformability.
  • Ceramics for example, which have no ductility, are continuously broken into small pieces. Experiments have shown that these can be broken down to nanodimension. It has also been shown that the metallic matrix undergoes significant increases in strength when it falls below the ceramic phases contained therein below the one-micron limit. On the other hand, metals with deformability are only deformed to the greatest possible extent, partly due to embrittling work hardening but also broken.
  • the broken hard material phases are then alloyed into the metal matrix and kneaded by the continuous grinding movement into workable powder fractions.
  • oxide ceramics and metals without sintering. This is justified by the fact that the crushing process on the ceramic continuously generates fresh, high-energy surfaces that have a high microscopic affinity. Due to the high mechanical impulses during grinding, the metallic and ceramic surfaces are pressed together so strongly that it is likely that interfacial reactions occur at the atomic level. Subsequent sintering of the powders may occasionally produce a further increase in ceramic-metal cohesion.
  • the hard material sizes in the powder can be adjusted specifically.
  • not only a hard material phase and a metal matrix can serve as starting materials, but virtually any number.
  • the powder can be additionally supplied with a useful for the application of solid lubricants.
  • the powders are then applied by thermal coating processes, in which case thermal spraying, laser coating, as well as build-up welding and soldering can be used particularly well.
  • HVOF high-speed flame spraying
  • Example 1 conventional wettable powder of alumina was ground with a conventional wettable powder of NiCr in the volume ratio of 1: 1. After the milling process, a powder of very finely distributed aluminum oxide phases (gray) was formed in the matrix (Fig. 1: mechanically alloyed powder NiCr-34Al 2 O 3 ). After processing by means of HVOF, a very well adhering, dense coating is produced, which has the same microstructure to the powder (FIG. 2: HVOF-sprayed layer shows identical microstructures).
  • Example 2 up to 20% by volume of a pulverulent solid lubricant was added to the powder from Example 1, which after detection by means of HVOF is demonstrably present in the layer and clearly improves the friction behavior of the layer on the piston ring.
  • Example 3 the matrix of Example 1 was further metalated such as e.g. Mo alloyed to improve the tribological properties of the piston ring coating.
  • Mo powder is only slightly finely ground in the grinding process because of its high toughness, but is present in the powder and in the coating as homogeneously distributed, superbly embedded phase. The fire trail behavior of the piston ring coating could be demonstrably improved in this way.
  • Example 4 50% by volume of two different ceramic phases (aluminum oxide, zirconium oxide) were admixed with the powder from Example 1.
  • the ceramics were added to the grinding process at different times, whereby the different ceramic phases in the HVOF layer have different fractions.
  • the matrix hardness can be controlled in a targeted manner by the one ceramic without the tribologically required hard phase size of the other ceramic being adversely affected.
  • the abrasion resistance of the piston ring coating can be clearly improved.
  • Example 5 fine diamond dust was admixed and alloyed with a commercial NiCr spray powder. After processing by means of HVOF, it was possible to ascertain an increase in wear resistance compared with the unalloyed matrix, which has an advantageous effect on the tribological properties of the piston ring coating.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Powder Metallurgy (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)

Claims (11)

  1. Segment de piston pour moteurs à combustion interne, caractérisé en ce que le segment de piston présente sur les surfaces de flancs et/ou la surface de glissement un revêtement résistant à l'usure à base de poudres alliées mécaniquement qui peuvent être obtenues en alliant mécaniquement
    - des poudres constituées de nickel ou de fer et d'un ou plusieurs des éléments d'alliage avec le nickel ou le fer que sont le carbone, le silicium, le chrome, le molybdène, le cobalt ainsi que de fer ou de nickel en tant que matrice métallique, en une quantité de 70 à 5% en volume ramenée au mélange total, la proportion des éléments d'alliage pris ensemble ne dépassant pas 70% en poids de la totalité de l'alliage de la matrice,
    - un ou plusieurs des dispersoïdes Al2O3, Cr2O3, TiO2, ZrO2, Fe3O4, TiC, SiC, CrC, WC, BC ou diamant, la taille de particules du ou des dispersoïdes allant jusqu'à 10 µm environ et la proportion des dispersoïdes se situant dans la plage de 30 à 95% en volume, ramenée au mélange total,
    et en déposant la poudre alliée mécaniquement par projection à chaud.
  2. Segment de piston selon la revendication 1, caractérisé en ce que le revêtement résistant à l'usure est mécaniquement allié en plus avec des quantités de lubrifiants solides en poudre choisis dans le groupe comprenant le graphite, le nitrure de bore hexagonal, le polytétrafluoroéthylène, la proportion des lubrifiants solides en poudre allant jusqu'à 30% en volume, ramenée au mélange total.
  3. Segment de piston selon l'une des revendications 1 et/ou 2, caractérisé en ce que le revêtement résistant à l'usure est mécaniquement allié en plus avec des quantités d'un ou plusieurs additifs choisis dans le groupe comprenant les éléments Ti, Zr, Hf, Al, Si, P, B en une quantité allant jusqu'à 2% en poids, ramenée à l'alliage total de la matrice métallique.
  4. Segment de piston selon l'une des revendications 1 à 3, caractérisé en ce que la phase céramique du revêtement résistant à l'usure représente de 70 à 90% en volume.
  5. Segment de piston selon l'une des revendications 1 à 4 précédentes, caractérisé en ce que la matrice métallique du revêtement résistant à l'usure se présente sous la forme de nickel contenant jusqu'à 50% en poids de chrome.
  6. Segment de piston selon l'une des revendications 1 à 4 précédentes, caractérisé en ce que la matrice métallique du revêtement résistant à l'usure se compose de nickel contenant jusqu'à 30% en poids de chrome et jusqu'à 30% en poids de molybdène.
  7. Segment de piston selon l'une des revendications 1 à 4 précédentes, caractérisé en ce que la matrice métallique du revêtement résistant à l'usure se présente sous la forme de fer contenant jusqu'à 50% en poids de chrome.
  8. Segment de piston selon l'une des revendications 1 à 4, précédentes caractérisé en ce que la matrice métallique du revêtement résistant à l'usure se compose de fer contenant jusqu'à 30% en poids de chrome et jusqu'à 30% en poids de molybdène.
  9. Segment de piston selon l'une des revendications 1 à 8 précédentes, caractérisé en ce que la phase céramique du revêtement résistant à l'usure se compose d'Al2O3.
  10. Segment de piston selon l'une des revendications précédentes, caractérisé en ce que l'épaisseur du revêtement se situe dans la plage de 0,01 à 1,0 mm.
  11. Segment de piston selon l'une des revendications précédentes, caractérisé en ce que le revêtement a été déposé par projection à chaud, en particulier par projection à la flamme à grande vitesse (HVOF).
EP01976101A 2000-09-21 2001-08-17 Revetement applique par voie thermique, destine a des segments de piston et constitue de poudres alliees mecaniquement Expired - Lifetime EP1322794B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10046956 2000-09-21
DE10046956A DE10046956C2 (de) 2000-09-21 2000-09-21 Thermisch aufgetragene Beschichtung für Kolbenringe aus mechanisch legierten Pulvern
PCT/EP2001/009514 WO2002024970A2 (fr) 2000-09-21 2001-08-17 Revetement applique par voie thermique, destine a des segments de piston et constitue de poudres alliees mecaniquement

Publications (2)

Publication Number Publication Date
EP1322794A2 EP1322794A2 (fr) 2003-07-02
EP1322794B1 true EP1322794B1 (fr) 2008-05-28

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ID=7657203

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EP01976101A Expired - Lifetime EP1322794B1 (fr) 2000-09-21 2001-08-17 Revetement applique par voie thermique, destine a des segments de piston et constitue de poudres alliees mecaniquement

Country Status (6)

Country Link
US (1) US6887585B2 (fr)
EP (1) EP1322794B1 (fr)
JP (1) JP2004510050A (fr)
DE (1) DE10046956C2 (fr)
PT (1) PT1322794E (fr)
WO (1) WO2002024970A2 (fr)

Families Citing this family (111)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3555844B2 (ja) 1999-04-09 2004-08-18 三宅 正二郎 摺動部材およびその製造方法
DE10061750B4 (de) * 2000-12-12 2004-10-21 Federal-Mogul Burscheid Gmbh Wolframhaltige Verschleißschutzschicht für Kolbenringe
US6562480B1 (en) * 2001-01-10 2003-05-13 Dana Corporation Wear resistant coating for piston rings
US6887530B2 (en) * 2002-06-07 2005-05-03 Sulzer Metco (Canada) Inc. Thermal spray compositions for abradable seals
WO2004035852A1 (fr) * 2002-10-15 2004-04-29 Kabushiki Kaisha Riken Segment de piston et revetement applique par un projection a l'arc a utiliser pour le segment, ainsi que procede de fabrication de ce segment
JP2004138128A (ja) 2002-10-16 2004-05-13 Nissan Motor Co Ltd 自動車エンジン用摺動部材
US6969198B2 (en) 2002-11-06 2005-11-29 Nissan Motor Co., Ltd. Low-friction sliding mechanism
US6808756B2 (en) * 2003-01-17 2004-10-26 Sulzer Metco (Canada) Inc. Thermal spray composition and method of deposition for abradable seals
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DE10046956C2 (de) 2002-07-25
EP1322794A2 (fr) 2003-07-02
DE10046956A1 (de) 2002-04-25
WO2002024970A2 (fr) 2002-03-28
US20030180565A1 (en) 2003-09-25
JP2004510050A (ja) 2004-04-02
US6887585B2 (en) 2005-05-03

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