EP3325685B1 - Procédé pour recouvrir une surface de glissement de cylindre d'un bloc-cylindres, bloc-cylindres avec une surface de glissement de cylindre recouverte et moteur - Google Patents

Procédé pour recouvrir une surface de glissement de cylindre d'un bloc-cylindres, bloc-cylindres avec une surface de glissement de cylindre recouverte et moteur Download PDF

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Publication number
EP3325685B1
EP3325685B1 EP16730300.7A EP16730300A EP3325685B1 EP 3325685 B1 EP3325685 B1 EP 3325685B1 EP 16730300 A EP16730300 A EP 16730300A EP 3325685 B1 EP3325685 B1 EP 3325685B1
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EP
European Patent Office
Prior art keywords
base material
cylinder
layer
coating
bonding agent
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EP16730300.7A
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German (de)
English (en)
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EP3325685A1 (fr
Inventor
Klaus Stefan Klimek
Stefan Richter
Jürg WIPF
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Volkswagen AG
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Volkswagen AG
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    • 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
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/02—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material
    • C23C28/021—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material including at least one metal alloy layer
    • 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
    • C23C4/08—Metallic material containing only metal elements
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/004—Cylinder liners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/18—Other cylinders
    • F02F1/20—Other cylinders characterised by constructional features providing for lubrication

Definitions

  • the invention relates to a method for coating a cylinder liner of a cylinder crankcase, a cylinder crankcase and an engine.
  • thermal spraying processes are often used to coat workpieces, such as plasma spraying; High speed flame spraying (HVOF), arc spraying and arc wire spraying.
  • layers are produced on a workpiece, the workpiece being, for example, metallic and the coating being metallic, ceramic or a mixture of the two.
  • the coating often comprises several individual layers, which are arranged one above the other and generally have different functionalities.
  • Thermal protective layers TBC
  • corrosion protection layers corrosion protection layers
  • erosion protection layers or sliding layers, which simplify the sliding together of counter-rotating bodies.
  • An application example is the coating of cylinder running surfaces in internal combustion engines with layers that have good lubricating and friction properties, which improves the running properties of the piston in the cylinder.
  • cylinder crankcases In vehicle construction and in particular in the production of cylinder crankcases (ZKG), lightweight construction is increasingly used.
  • aluminum cylinder crankcases are used, which have a coating in the area of the cylinder race.
  • the effect of the coating is, in addition to increasing the robustness of the raceway, a significantly reduced friction in the area of the piston group and associated reduction in CO 2 emissions, as well as positive effects against corrosive media.
  • Common thermal coating processes are powder plasma spraying, wire spraying processes such as plasma transfer wire arc (PTWA) and arc wire spraying (LDS) or high-speed flame spraying.
  • PTWA plasma transfer wire arc
  • LDS arc wire spraying
  • a thermal composite spray powder for thermal spraying of cylinder inner walls which comprises aluminum and a metal based on iron, namely cast iron or an iron-molybdenum alloy, as well as an organic binder.
  • US 2, 588,422 A discloses the manufacture of an aluminum cylinder block, the holes first being coated with molybdenum using a wire spray process and subsequently with a hard metal, such as steel.
  • a roughening process is required to clamp the coating in the surface.
  • the roughening process is carried out by blasting processes using corundum or water (medium-pressure / high-pressure water jets), laser beam roughening or roughening with a geometrically defined cutting edge.
  • corundum or water medium-pressure / high-pressure water jets
  • laser beam roughening or roughening with a geometrically defined cutting edge.
  • the methods described have the disadvantage that the blasting medium has to be prepared in a complex manner, and furthermore the processes have to be monitored by additional and extensive analysis methods and large amounts of dusts, chips and sludges have to be removed and disposed of. Furthermore, large investments have to be made to install these roughening processes.
  • Another disadvantage is that the emulsion rinsing of the cutting edges used in mechanical roughening is often not effective enough, so that chips remain in the roughening profile again and again and negatively influence the layer structure and the layer quality in the coating process.
  • large investments have to be made to install these roughening processes.
  • the invention is based on the object of providing a method for coating a metallic workpiece, namely a cylinder track of a cylinder crankcase, in which a pretreatment and in particular roughening of the surface are unnecessary.
  • a first aspect of the invention relates to a method for coating a cylinder liner of a cylinder crankcase consisting of gray cast iron or an aluminum-containing light metal alloy, comprising in a step (a) the provision of a powdery base material, the base material being iron or an iron alloy, and a powdery adhesion promoter .
  • the coupling agent comprises a mixture of 20 to 80% by weight of molybdenum; 20 to 80% by weight of an aluminum-containing alloy which is selected from a nickel-aluminum alloy NiAl, in particular Ni (95%) Al (5%), a copper-aluminum alloy CuAl, in particular Cu (90%) Al (10 %), a cobalt-aluminum alloy, a magnesium-cobalt-aluminum alloy, a silicon-aluminum alloy, a silver-aluminum alloy and an aluminum-bronze; and optionally 0.2 to 5% by weight of boron, the molybdenum, the aluminum-containing alloy and boron adding up to 100% by weight.
  • an aluminum-containing alloy which is selected from a nickel-aluminum alloy NiAl, in particular Ni (95%) Al (5%), a copper-aluminum alloy CuAl, in particular Cu (90%) Al (10 %), a cobalt-aluminum alloy, a magnesium-cobalt-a
  • the method according to the invention comprises applying the base material and the adhesion promoter to the cylinder race of the cylinder crankcase by means of a thermal coating method in step (b), wherein either a layer of a powder mixture of the adhesion promoter and the base material on which the cylinder race is arranged or a first one Layer comprising the adhesion promoter arranged on the cylinder track and then a second layer comprising the base material is arranged on the first layer.
  • Thermal coating processes are powder plasma spraying, wire spraying processes such as plasma transfer wire arc (PTWA) and arc wire spraying (LDS) or high-speed flame spraying.
  • PTWA plasma transfer wire arc
  • LDS arc wire spraying
  • adhesion promoters mentioned ensure very good adhesion by exothermic reaction of the components with one another, in particular in connection with molybdenum, Ni (95%) Al (5%) in particular having proven suitable.
  • the layer does not self-grow or self-weld during the coating, and therefore no intermetallic bonds are produced.
  • a process step for pretreatment which precedes a coating of the workpiece, is not necessary and can be saved. This saving leads to economic, in particular financial advantages, since the process time is reduced overall. If the pretreatment involves roughening the material, there is also no need to dispose of the materials used in the roughening process.
  • an increase in the quality of the workpiece is additionally achieved, since errors on the workpiece surface, which can occur as a result of the pretreatment, in particular the roughening of the surface, are completely avoided.
  • finely spindleed surfaces can also be coated without loss of quality.
  • the coating produced with the method according to the invention serves as a protective layer for a cylinder track of a cylinder crankcase.
  • the protective layer preferably increases the friction resistance.
  • the properties of the protective layer are largely determined by the base material.
  • the adhesion promoter is either arranged together with the base material on the metallic workpiece surface (cylinder raceway) and is then present together with the base material in a mixed layer on the workpiece surface, so that an adhesive base integrated in the protective layer is formed.
  • the method according to the invention provides for the adhesion promoter to be arranged in a separate layer without base material as a primer on the workpiece surface and then for a protective layer to be arranged on the primer, which preferably has only the base material, but at least not the adhesion promoter.
  • the adhesion promoter and the base powder are present as a physical mixture, i.e. they do not form any chemical compounds or alloys.
  • adhesion promoter The separation of adhesion promoter and base material in two layers offers several advantages. On the one hand, the effect of the adhesion promoter can be increased and thus the adhesive tensile values of the coating on the workpiece surface can be improved, on the other hand the adhesion promoter does not come with the separate application of the individual layers Surrounding the workpiece. Interaction of the adhesion promoter with the surroundings of the workpiece can thus be avoided.
  • All of the layers mentioned are preferably coated using the same thermal coating method.
  • the disadvantages of an additional coating step are thus negligible, especially when special precautions are taken, such as the use of a plasma torch with a double powder conveyor for powder supply, in order to keep the additional expenditure of an additional coating step as low as possible.
  • special precautions such as the use of a plasma torch with a double powder conveyor for powder supply
  • a change between the two powders can be carried out without any problems, advantageously cleaning or a change of a feed hose or the like. is not required.
  • the method according to the invention is used with particular advantage in workpieces which have a light metal surface, namely an aluminum-containing alloy such as AlSi 17 , AlSi 9 , and others, or a gray cast iron surface, a gray cast iron surface being particularly preferred because corresponding cylinder liners have proven to be particularly durable.
  • the aluminum-containing alloy of the adhesion promoter is a nickel-aluminum alloy (nickel-based alloys), a copper-aluminum alloy - not according to the invention with iron, a cobalt-aluminum alloy, a silicon-aluminum alloy, a magnesium-cobalt-aluminum alloy, a silver Aluminum alloy, or an aluminum bronze.
  • the adhesion promoter preferably has no further components, so that the percentages of molybdenum and the aluminum-containing alloy preferably add up to 100%. It is further preferred that 0.2-5% boron is added to the adhesion promoter to support the adhesive effect. According to the invention, the molybdenum, the aluminum-containing alloy and boron add up to 100% by weight.
  • the silicon content is preferably 8 to 25% by weight, based on the adhesion promoter.
  • the base material comprises iron or an iron alloy, e.g. Steel, preferably a low-alloy steel or an iron-based steel, in particular 100Cr6, with 0.05 to 1.5% by weight carbon; 0.05 to 3.5 wt% manganese; 0.05 to 3.0 wt% chromium; 0.01 to 1% by weight silicon and / or 0.001 to 0.4% by weight sulfur and / or a chromium steel with an iron base and 0.05 to 0.8% by weight carbon; 0-3% by weight molybdenum; 0.05 to 1.8 wt% manganese; 11.5 to 18 wt% chromium; 0.01 to 1 wt .-% silicon and / or 0.002 to 0.2 wt .-% sulfur.
  • These are particularly suitable as a protective layer, in particular for cylinder components, and interact with the adhesion promoter
  • adhesion promoter and the base material based on the weight, in a ratio of approximately 10:90, 20:80, 30:70, 40:60 or 50:50 in the powder mixture of adhesion promoter and base material available.
  • the method comprises a further step (c) in which a layer of the base material is applied to the surface of the substrate by means of the thermal coating method Step (b) generated coating is applied.
  • Step (b) generated coating is applied.
  • the thermal coating method is plasma spraying.
  • plasma spraying an anode and up to three cathodes are usually separated by a narrow gap in a plasma torch.
  • An arc is generated between the anode and cathode by means of a direct voltage.
  • the gas or gas mixture flowing through the plasma torch is passed through the arc and ionized in the process.
  • the dissociation, or subsequent ionization generates a highly heated (up to 30,000 K), electrically conductive gas from positive ions and electrons.
  • Powder (usual particle size distribution: 5-200 ⁇ m, grain size down to 100 nm is possible) is injected into this plasma jet, which is melted by the high plasma temperature.
  • the plasma stream entrains the powder particles and hurls them onto the workpiece to be coated.
  • the gas molecules return to a stable state after a very short time and the plasma temperature drops again after a short distance.
  • the plasma spray coating is carried out in a normal atmosphere, an inert atmosphere (under protective gas such as argon), in a vacuum or under water, the coating under a normal (compressed air) atmosphere being preferred, since this reduces the process costs compared to the other variants.
  • the speed, temperature and the composition of the plasma gas are important for the layer quality.
  • Gases used can be argon, nitrogen, hydrogen or helium.
  • Plasma spraying creates optimally constructed layers for cylinder liners with a non-communicating microporosity, which after the manufacturing process serves as an oil retention volume on the smoothly honed cylinder surface.
  • a conventional honing groove structure as an oil retention volume can be dispensed with. Due to its universal applicability, plasma spraying has a large industrial application and has advantages such as flexible material selection (the process allows a wide range of spraying materials that are easy to produce and mix), high particle impact speeds, good adhesive strength of the applied layers and, due to the compact size Burner design, the possibility of carrying out an inner coating even with small diameters, has become the most important of all thermal spray processes.
  • Wire spraying processes are an alternative for cylinder raceway coatings, however layers are produced here that have a significantly lower porosity compared to plasma spraying layers and thus have only a few large pores on the raceway surface after honing, which in most cases are insufficient as oil retention volumes.
  • Another disadvantage is the strong oxide formation, particularly in the single-wire process (PTWA or RSW), if the layers are sprayed without protective gas and can thus lead to increased susceptibility to corrosion. This oxide formation does not lead to a continuous oxide layer.
  • the method particularly advantageously does not include any pretreatment of the surface of the workpiece, in particular no roughening of the surface of the workpiece.
  • the method according to the invention does not exclude the possibility of pretreatment, but the method according to the invention enables the pretreatment of the workpiece surface, in particular by roughening the workpiece surface, to be omitted. Failure to pretreat the surface of the workpiece, in particular refraining from roughening the surface, leads not only to high process cost savings, but also to an improvement in the quality of the coated surface.
  • finely spindleed surfaces can also be coated with the method according to the invention if a pretreatment, in particular roughening, by which the finely spindle surface would be changed, in particular destroyed, is omitted.
  • the thermal coating process is preferably carried out without active air conditioning.
  • the cylinder crankcase heats up in the process, i.e. during the coating process, for example through molten plasma powder and cools down automatically. After coating, the cylinder crankcase is approx. 100 ° C to a maximum of 140 ° C warm.
  • the cylinder crankcase is preferably upright for coating and is received on the oil pan side.
  • the cylinder crankcase is preferably accommodated on the top deck.
  • the cylinder crankcase can preferably also be accommodated on the transmission side.
  • Another aspect of the invention relates to a cylinder crankcase with a cylinder raceway which has a coating produced according to the method of the invention.
  • the coating of the component according to the invention either has a mixed layer arranged on a surface of the cylinder raceway, which comprises the base material and the adhesion promoter made of molybdenum and aluminum-containing alloy.
  • the Coating a first layer of the adhesion promoter and a second layer, which comprises the base material but not the adhesion promoter.
  • the coating greatly improves the frictional resistance of the coated surface and at the same time has a high level of resistance, since the coating shows very good adhesion to the workpiece surface.
  • Adhesive tensile values of 50 to> 70 MPa are achieved with the method according to the invention. In this way, the adhesive tensile values of a conventional process, in which the adhesion of the coating is achieved by roughening the surface beforehand and without an adhesion promoter, are achieved from 20 to> 70 MPa and even exceeded in the lower range.
  • the first and the second layer are applied to the workpiece surface using a thermal coating method.
  • Another aspect of the invention relates to an engine which has a cylinder crankcase according to the invention.
  • FIGS. 1 to 6 show light microscope images of cross sections (longitudinal sections) of a coated workpiece 1 (cylinder raceway) of a component 10 (cylinder crankcase) in different embodiments.
  • a part of the workpiece 1 is shown, on the metallic surface of which a coating 2 is arranged.
  • the coating 2 can be applied, for example, using the method according to the invention.
  • the workpiece 1 shown comprises a metallic surface made of a light metal alloy, more precisely an aluminum-containing alloy, namely AlSi 17 .
  • Coating 2 was applied to this surface in one process step.
  • Coating 2 shown comprises a low-alloy steel as the base material and an adhesion promoter which is integrated in the layer.
  • Coating 2 shown was produced with the method according to the invention in that a powder mixture of base material and adhesion promoter was applied to the metallic surface by means of plasma spraying. The particles of the powder mixture melted and bonded on the surface to form a uniform mixed layer 3.
  • FIG. 2 A workpiece 1 is shown which has the same coating 2 as that in FIG Figure 1 workpiece 1 shown. However, the surface of the workpiece 1 is made of gray cast iron.
  • the Figures 3 and 4 each show a light microscope image of a cross section (longitudinal section) of a coated workpiece 1 according to a further embodiment of the invention.
  • the Figures 3 and 4 each show a workpiece 1 with a two-layer coating 2.
  • the coating 2 here comprises a mixed layer 3, which comprises a mixture of the base material and the adhesion promoter.
  • the mixed layer 3 essentially corresponds to the mixed layer 3 the one in the Figures 1 and 2 shown execution, but is in contrast to this layer thickness between 20 and 55 microns much thinner.
  • a base material layer 4, which essentially consists of the base material, is arranged on the mixed layer 3 composed of base material and adhesion promoter. This is many times thicker than the mixed layer 3.
  • Preferred layer thicknesses for powder plasma spray layers are in the range from 120 to 180 ⁇ m, in particular in the range from 140 to 160 ⁇ m and at most 300 ⁇ m, and in the case of wire spray layers preferably in the range from 150 to 300 ⁇ m, especially in the range from 170 to 250 ⁇ m, up to a maximum of 500 ⁇ m.
  • the mixed layer 3 has the function of increasing the adhesion of the coating 2, while the base material layer 4 determines the properties of the workpiece to the outside, such as the frictional resistance.
  • the Figures 3 and 4 differ in the material of the coated workpiece. While the coating is 2 in Figure 3 is arranged on a light metal alloy, for example an aluminum-containing alloy such as AlSi 17 , the material of the workpiece 1 in FIG Figure 4 shown execution around a gray cast iron.
  • the coatings 2 shown can be applied using the method according to the invention.
  • a powder mixture of adhesion promoter and base material is first provided and arranged on the surface of the workpiece 1 by means of a thermal coating process, such as plasma spraying, so that a homogeneous mixing layer 3 is formed.
  • a powder which contains the base material but not the adhesion promoter is then provided and is likewise applied to the mixing layer 3 using a, preferably the same, thermal method.
  • the device that carries out the thermal coating process can be equipped with a double powder conveyor, so that the same device can be used for both coating steps.
  • the Figures 5 and 6 each show a light microscope image of a cross section (longitudinal section) of a coated workpiece 1 according to further embodiments of the invention.
  • the Figures 5 and 6 show the same coating 2, but differ in the material of the workpiece 1, which in Figure 5 a light metal alloy (in particular AlSi 17 ) and in the workpiece 1 Figure 6 includes a gray cast iron.
  • the coating 2 in the Figures 5 and 6 is also designed as a two-layer system, the first layer arranged on the workpiece surface being an adhesive base 5 on which a base material layer 6 is deposited, which contains the base material.
  • the primer 5 has the adhesion promoter and contains no base material.
  • the base material of the embodiments shown is a low-alloy steel, such as (preferably iron-based steel with 0.05 to 1.5% by weight of carbon; 0.05 to 3.5% by weight of manganese; 0.05 to 3.0% by weight of chromium; 0.01 to 1% by weight silicon and / or 0.001 to 0.4% by weight sulfur and / or a chrome steel with an iron base and 0.05 to 0.8% by weight carbon; 0 - 3% by weight Molybdenum; 0.05 to 1.8% by weight manganese; 11.5 to 18% by weight chromium; 0.01 to 1% by weight silicon and / or 0.002 to 0.2% by weight sulfur.
  • a low-alloy steel such as (preferably iron-based steel with 0.05 to 1.5% by weight of carbon; 0.05 to 3.5% by weight of manganese; 0.05 to 3.0% by weight of chromium; 0.01 to 1% by weight silicon and / or 0.001 to 0.4% by weight sulfur and / or a chrome steel with an iron base and 0.05
  • the ratio of adhesion promoter and Base material has in the mixed layers 3 of the Figures 1 to 4 preferably a ratio of 20% by weight of adhesion promoter to 80% by weight of base material.
  • the adhesion promoter is contained in the mixed layer 3 in a range from 10 to 80% by weight and the base material accordingly in the range from 20 to 90% by weight.
  • the adhesion promoter is a mixture of molybdenum and a Ni5Al alloy (95% nickel% and 5% aluminum) or a mixture of molybdenum NiAI alloy and the base material as described above.
  • nickel in the aluminum-containing alloy can be replaced by cobalt, copper or silver.
  • Molybdenum is 20 to 80 wt .-% and the aluminum-containing alloy in a range of 20 to 80 wt .-% in the coupling agent.
  • layers of this type can also be produced by means of wire spray processes such as LDS, PTWA and RSW, in that the adhesion promoter is positioned in a cored wire or in that wire spray layers can be sprayed onto an adhesive base applied by a plasma spray process.
  • wire spray processes such as LDS, PTWA and RSW, in that the adhesion promoter is positioned in a cored wire or in that wire spray layers can be sprayed onto an adhesive base applied by a plasma spray process.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Physics & Mathematics (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Claims (10)

  1. Procédé de revêtement d'une surface de glissement de cylindre (1) d'un bloc-cylindres (10) constituée par de la fonte grise ou un alliage de métaux légers contenant de l'aluminium, comprenant les étapes suivantes :
    (a) la mise à disposition d'un matériau de base en poudre, le matériau de base étant le fer ou un alliage de fer, et
    la mise à disposition d'un promoteur d'adhésion en poudre, le promoteur d'adhésion étant un mélange comprenant :
    20 à 80 % en poids de molybdène (Mo),
    20 à 80 % en poids d'un alliage contenant de l'aluminium, qui est choisi parmi un alliage de nickel-aluminium, un alliage de cuivre-aluminium, un alliage de cobalt-aluminium, un alliage de magnésium-cobalt-aluminium, un alliage de silicium-aluminium, un alliage d'argent-aluminium et un bronze d'aluminium, et
    éventuellement 0,2 à 5 % en poids de bore,
    à chaque fois par rapport au promoteur d'adhésion, la somme du molybdène, de l'alliage contenant de l'aluminium et du bore étant de 100 % en poids, et
    (b) l'application du matériau de base et du promoteur d'adhésion sur la surface de glissement de cylindre (1) du bloc-cylindres (10) au moyen d'un procédé de revêtement thermique, soit
    - par application d'une couche (3) d'un mélange de poudres constitué par le promoteur d'adhésion et le matériau de base, soit
    - par application d'une première couche (5) comprenant le promoteur d'adhésion, puis application d'une deuxième couche (6), comprenant le matériau de base, sur la première couche (5).
  2. Procédé selon la revendication 1, caractérisé en ce que le matériau de base comprend de l'acier.
  3. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le promoteur d'adhésion et le matériau de base sont présents en un rapport en poids de 10/90, 20/80, 30/70, 40/60 ou 50/50 dans le mélange de poudres.
  4. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'étape (b) comprend l'application d'une couche (3) d'un mélange de poudres constitué par le promoteur d'adhésion et le matériau de base, et le procédé comprend une étape supplémentaire (c), lors de laquelle une couche (4) du matériau de base est appliquée au moyen de procédés de revêtement thermiques sur le revêtement formé à l'étape (b).
  5. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le promoteur d'adhésion comprend Ni(95 %)Al(5 %).
  6. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le procédé de revêtement thermique est une pulvérisation par plasma.
  7. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le procédé de revêtement thermique est une projection au fil, l'application du matériau de base et du promoteur d'adhésion selon l'étape (b) ayant lieu par application d'une première couche (5) comprenant le promoteur d'adhésion, puis application d'une deuxième couche (6), comprenant le matériau de base, sur la première couche (5) .
  8. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le procédé ne comprenant pas de rugosification de la surface de glissement de cylindre (1) du bloc-cylindres (10).
  9. Bloc-cylindres (10) comprenant une surface de glissement de cylindre (1), qui comprend un revêtement (2) appliqué au moyen d'un procédé selon l'une quelconque des revendications 1 à 8.
  10. Moteur comprenant un bloc-cylindres (10) selon la revendication 9.
EP16730300.7A 2015-07-23 2016-06-08 Procédé pour recouvrir une surface de glissement de cylindre d'un bloc-cylindres, bloc-cylindres avec une surface de glissement de cylindre recouverte et moteur Active EP3325685B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015213896.8A DE102015213896A1 (de) 2015-07-23 2015-07-23 Verfahren zur Beschichtung eines metallischen Werkzeugs und Bauteil
PCT/EP2016/063060 WO2017012769A1 (fr) 2015-07-23 2016-06-08 Procédé pour recouvrir une surface de glissement de cylindre d'un bloc-cylindres, bloc-cylindres avec une surface de glissement de cylindre recouverte et moteur

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EP3325685A1 EP3325685A1 (fr) 2018-05-30
EP3325685B1 true EP3325685B1 (fr) 2020-04-08

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EP16730300.7A Active EP3325685B1 (fr) 2015-07-23 2016-06-08 Procédé pour recouvrir une surface de glissement de cylindre d'un bloc-cylindres, bloc-cylindres avec une surface de glissement de cylindre recouverte et moteur

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EP (1) EP3325685B1 (fr)
CN (1) CN107810290B (fr)
DE (1) DE102015213896A1 (fr)
WO (1) WO2017012769A1 (fr)

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CN110373624B (zh) * 2019-07-12 2021-05-25 广东新岭南科技有限公司 钼基复合材料及其制备方法，复合钼电极
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CN114672759A (zh) * 2022-04-08 2022-06-28 中国人民解放军第五七一九工厂 铝合金磨损面尺寸修复方法

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Publication number Publication date
CN107810290A (zh) 2018-03-16
CN107810290B (zh) 2019-12-20
DE102015213896A1 (de) 2017-01-26
WO2017012769A1 (fr) 2017-01-26
EP3325685A1 (fr) 2018-05-30

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