US20070059529A1 - Wear-resistant coating and process for producing it - Google Patents

Wear-resistant coating and process for producing it Download PDF

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Publication number
US20070059529A1
US20070059529A1 US11/517,787 US51778706A US2007059529A1 US 20070059529 A1 US20070059529 A1 US 20070059529A1 US 51778706 A US51778706 A US 51778706A US 2007059529 A1 US2007059529 A1 US 2007059529A1
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Prior art keywords
wear
layer
machine
resistant coating
hydrocarbon layer
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US11/517,787
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English (en)
Inventor
Tim Hosenfeldt
Martin Kramer
Alexander Freiburg
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IHO Holding GmbH and Co KG
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Individual
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Assigned to SCHAEFFLER KG reassignment SCHAEFFLER KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HOSENFELDT, TIM MATTHIAS
Assigned to SCHAEFFLER KG reassignment SCHAEFFLER KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FREIBURG, ALEXANDER
Assigned to SCHAEFFLER KG reassignment SCHAEFFLER KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KRAMER, MARTIN
Publication of US20070059529A1 publication Critical patent/US20070059529A1/en
Priority to US12/220,280 priority Critical patent/US7824733B2/en
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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
    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
    • C23C14/0605—Carbon
    • 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
    • C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
    • C23C16/02—Pretreatment of the material to be coated
    • C23C16/0272—Deposition of sub-layers, e.g. to promote the adhesion of the main coating
    • 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
    • C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
    • C23C16/22—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
    • C23C16/26—Deposition of carbon only
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/30—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C2/34—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members
    • F04C2/356—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member
    • F04C2/3566—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member the inner and outer member being in contact along more than one line or surface
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2230/00—Manufacture
    • F04C2230/90—Improving properties of machine parts
    • F04C2230/91—Coating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2203/00—Non-metallic inorganic materials
    • F05C2203/08—Ceramics; Oxides
    • F05C2203/0804—Non-oxide ceramics
    • F05C2203/0808—Carbon, e.g. graphite
    • 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
    • Y10T428/30—Self-sustaining carbon mass or layer with impregnant or other layer
    • 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
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/2101—Cams

Definitions

  • the present invention relates to a wear-resistant coating on predetermined surfaces of machine or engine parts consisting of a sintered material which are exposed to frictional wear, and to a process for producing a wear-resistant coating of this type, in particular for machine or engine parts consisting of a sintered material in fuel feed units.
  • the applicant is familiar with fuel feed units which, for example in the case of a 4-, 5- and 10-cylinder tandem pump from LuK-Automobiltechnik, are based on the so-called rigid vane principle.
  • This principle uses a cam plate, which is rotatably arranged in a middle plate of the feed unit and is in contact with an assigned mating surface of the middle plate by means of specific contact surfaces of the cam plate.
  • Both the cam plate and the middle plate are preferably produced from a sintered material for reasons of cost.
  • radially occurring material wear at the corresponding contact surfaces occurs to a greater extent on the middle plate of the feed unit in the case of the 5- and 10-cylinder pumps.
  • the contact surfaces have been carbonitrided, nitrocarburized, nitrided and/or oxidized.
  • a disadvantage of this approach has been found to be the fact that, in spite of the thermochemical processes that are used, for example in spite of plasma nitrocarburizing of the middle plate, excessive, though reduced, wear continues to occur radially, in particular in the case of a 5- and 10-cylinder feed unit.
  • a plasma nitrocarburizing process on the cam plate also entails a number of problems. To withstand the loads which act on the cam plate, after the sintering process it is quenched in an endothermic gas atmosphere and tempered at approximately 200° C. to 250° C. The plasma nitrocarburizing takes place at a temperature of approximately 550° C. to 590° C.
  • the original hardness of the cam plate is lost and it has to be additionally induction-hardened at the loaded points.
  • the microstructure of the cam plate changes, and consequently so do the finished dimensions of the same, which is extremely disadvantageous and undesired for constructional reasons.
  • components produced from a sintered material are very porous and therefore contain foreign substances, such as for example cooling lubricants or the like. These foreign substances have to be removed before the plasma nitrocarburizing, in order for the coating process not to be disturbed by outgassing of the substances. Consequently, a further process step is disadvantageously required.
  • the applied wearing layer is not characterized by great uniformity in the case of nitrocarburizing, so that it may lead to spalling of the wearing layer. Furthermore, warping may also occur at the edges of the material.
  • thermochemical processes such as plasma nitrocarburizing for example
  • any bonding layers of a relatively high hardness have only a low hold on the cam plate of a relatively low material hardness, produced by the preheating treatment, so that any bonding layer may become detached from the cam plate in an undesired way.
  • the applicant is familiar with the approach of treating the contact surfaces of the components by means of a manganese-phosphating process or coating them with a sliding coating, or applying electroplated layers to the contact surfaces. Although the friction can be reduced, the wear resistance of such layers is low, so that the layer is removed. In the case of electroplated layers, moreover, the environmental impact is to be regarded as a disadvantageous factor.
  • the applicant is also familiar with applying layers with high surface hardnesses, such as for example TiN, CrN, (Ti, Al)N or the like, to the cam plate by means of PVD or (PA)CVD processes.
  • layers with high surface hardnesses such as for example TiN, CrN, (Ti, Al)N or the like
  • PA PACVD
  • a disadvantage of this approach has been found to be the fact that, on account of the higher friction occurring between the component partners and the increased surface hardness of the cam plate, the wear of the opposing body, i.e. the middle plate of the feed unit, is increased in a disadvantageous manner, so that the service life of the entire feed unit is reduced.
  • the object of the present invention is consequently to provide a wear-resistant coating and a process for producing such a coating by which the aforementioned disadvantages are eliminated, and by which in particular a wear resistance is ensured throughout the entire service life of a fuel feed unit with a reduced friction coefficient.
  • the wear-resistant coating on predetermined surfaces of machine or engine parts consisting of a sintered material which are exposed to frictional wear comprises at least one metal-free amorphous hydrocarbon layer with sp 2 - and sp 3 -hybridized carbon applied to the 10 predetermined surface of the machine or engine part for reducing friction and increasing the wear resistance of the predetermined surface of the machine or engine part.
  • the present invention has the advantage over the prior art that the wear resistance, for example in the contact region between the cam plate and the middle plate in a fuel feed unit, is increased in comparison with the prior art. Furthermore, a reduction of the friction in the sliding contact with the middle plate is ensured in comparison with the prior art.
  • a further advantage is that the properties of the cam plate or the sintered material with respect to the microstructure and the function-related component tolerances are advantageously unchanged when the wear-resistant coating according to the invention is applied. Consequently, use of the wear-resistant coating according to the invention makes it possible to revert to the low-cost sintered material as a substrate, so that the component can be competitively produced by the sintering process.
  • the coating applied to the sintered material represents a coating which has adhesive strength and wear resistance, does not change the properties of the component and advantageously prolongs the service life of the friction partners, and consequently of the feed unit.
  • the amorphous hydrocarbon layer has a hydrogen fraction of at most 20 atomic %.
  • the predetermined surface of the machine or engine part or of the cam plate has little tendency to adhere to the metallic opposing body, i.e. the middle plate, a high abrasive wear resistance, a high chemical resistance, high mechanical strengths and high hardness/modulus of elasticity ratios.
  • a higher hydrogen fraction could lead to undesired bonds with lubricants or the like.
  • the amorphous hydrocarbon layer preferably has process-related impurities, for example O or Ar atoms, metals or the like, of less than 1 atomic %.
  • the overall coating has a thickness of approximately 2.0 ⁇ m to 5.0 ⁇ m, the amorphous hydrocarbon layer preferably having a thickness of 1.0 ⁇ m to 4.0 ⁇ m.
  • Such layer thicknesses change the dimensions of the machine or engine parts to such a small degree that no further processing is necessary and the surface structure or topography which has been set is retained.
  • At least one intermediate layer or at least one adhesion promoting layer or a combination of these two is provided between the predetermined surface of the machine or engine part and the amorphous hydrocarbon layer.
  • the at least one intermediate layer is in this case preferably formed as a metal-containing hydrocarbon layer, the metal components comprising W, Ti, Hf, Ge or a combination of the aforementioned components.
  • the intermediate layer preferably has a thickness of approximately 0.5 ⁇ m to 2.0 ⁇ m.
  • the at least one adhesion promoting layer preferably comprises metallic substances, borides, carbides and/or nitrides of the transition metals.
  • the adhesion promoting layer preferably has a thickness of approximately 0.1 ⁇ m to 0.5 ⁇ m.
  • the amorphous hydrocarbon layer is deposited on the predetermined surface of the machine or engine part by means of a PVD or a (PA)CVD process.
  • Depositing of the at least one intermediate layer and/or the at least one adhesion promoting layer preferably takes place by means of a PVD process.
  • the predetermined surface of the machine or engine part consists of a hardened sintered steel. Consequently, it is possible to revert to the low-cost sintered steel as a substrate and for the machine or engine part to be competitively produced by the sintering process.
  • the predetermined surface of the machine or engine part preferably undergoes cleaning, for example bath cleaning in various cleaning baths, with a subsequent outgassing operation in a cleaning oven or the like. As a result, permanent adhesion of the coating to the base body is ensured.
  • the amorphous hydrocarbon layer, the at least one intermediate layer and/or the at least one adhesion promoting layer are deposited at in each case a coating temperature respectively less than the tempering temperature of the machine or engine part.
  • the outgassing temperature of any outgassing operation also advantageously lies below the tempering temperature of the machine or engine part. As a result, the machine or engine part does not experience any loss of hardness or any distortion.
  • Examples of uses for the wear-resistant coating are the contact surfaces of a cam plate with respect to a middle plate of a diesel feed unit of an internal combustion engine, the cam plate being produced from a sintered material.
  • middle plates valve gear components, such as for example bucket tappets, hydraulic supporting and insertion elements, rolling bearing components, control pistons, release bearings, piston pins, bearing bushes, linear guides or the like, consisting of a sintered material, to be provided with a wear-resistant coating of this type.
  • FIG. 1 shows a plan view of a diesel feed unit according to an exemplary embodiment of the present invention
  • FIG. 2 shows a cross-sectional view of the diesel feed unit from FIG. 1 along the section line A-A;
  • FIG. 3 shows an enlarged view of the wear-resistant coating according to a preferred exemplary embodiment of the present invention, deposited on the contact surface of the cam plate with respect to the middle plate.
  • FIG. 1 illustrates a plan view of a diesel feed unit 6
  • FIG. 2 illustrates a cross-sectional view along the line A-A of the diesel feed unit 6 from FIG. 1 according to a preferred exemplary embodiment of the present invention.
  • the diesel feed unit 6 has a middle plate 7 , in which a cam plate 1 rotates, forming frictional contact surfaces between the cam plate 1 and the middle plate 7 for operating a tandem pump system, for example based on a rigid vane principle.
  • material wear occurs, in particular at the contact surfaces between the cam plate 1 and the middle plate 7 of the feed unit 6 , on account of the frictional forces occurring.
  • FIG. 3 illustrates an enlarged representation of a detail of the cam plate 1 from FIG. 1 .
  • a wear-resistant coating 3 , 4 , 5 is provided on a predetermined surface 2 of the cam plate 1 to increase the wear resistance and to reduce the friction torque.
  • a metallic base body of a sintered material in particular of a hardened sintered material, is used as the base body of the cam plate 1 .
  • an adhesion promoting layer 3 is applied to a predetermined surface or to the contact surface 2 of the cam plate 1 with respect to the middle plate 7 .
  • the adhesion promoting layer 3 may be deposited on the predetermined surface 2 of the cam plate 1 for example by means of a PVD process (Physical Vapour Deposition).
  • the adhesion promoting layer 3 preferably comprises metallic substances, borides, carbides and nitrides of the transition metals or the like and preferably has a thickness of 0.1 ⁇ m to 0.5 ⁇ m.
  • the adhesion promoting layer 3 serves for improved attachment or improved crosslinking of the atoms of an intermediate layer or functional layer to be subsequently applied on the base body 1 .
  • the thickness of the adhesion promoting layer 3 is to be selected on the basis of the intermediate layer 4 that is used, or customer wishes and requirements.
  • an intermediate layer 4 is subsequently deposited on the adhesion promoting layer 3 , as can be seen in FIG. 3 , for example likewise by means of a PVD process.
  • the intermediate layer 4 may for example be applied as a metal-containing hydrocarbon layer (Me-C:H), it being possible for the metal components W, Ti, Hf, Ge or the like to occur individually or more than one together.
  • the intermediate layer 4 has, for example, a thickness of approximately 0.5 ⁇ m to 2.0 ⁇ m and serves for improved attachment of the functional layer on the adhesion promoting layer 3 , or in the case where there is no adhesion promoting layer 3 for improved attachment of the functional layer on the base body 1 from a physical, mechanical and chemical viewpoint.
  • the thickness of the intermediate layer 4 is in this case once again to be adapted to compositions of the layers used and to the respective requirements.
  • the actual functional layer S is subsequently deposited on the intermediate layer 4 .
  • the functional layer 5 may either be deposited directly on the base body 1 , directly on the adhesion promoting layer 3 or, as represented in FIG. 3 , directly on the intermediate layer 4 .
  • a special transition from the intermediate layer 4 to the functional layer 5 is preferably developed, ensuring optimum bonding of the functional layer 5 and inducing lowest possible stresses in the layer system or in the critical interface between the porous base material and the layer system, thereby avoiding spalling, both in a cohesive form and in an adhesive form. It should be pointed out at this stage that, in the case of certain application areas, it is also possible to dispense with the adhesion promoting layer 3 and/or the intermediate layer 4 .
  • the functional layer 5 is formed as an amorphous hydrocarbon layer (a-C:H) and is preferably deposited on an intended layer, according to the present exemplary embodiment on the intermediate layer 4 , by means of a PVD and/or (PA)CVD process (Plasma Assisted Chemical Vapour Deposition).
  • a-C:H amorphous hydrocarbon layer
  • PA PA
  • a starting material for example graphite
  • a stream of high-energy carbon ions is emitted from the graphite and guided in the direction of the surface to be coated.
  • the surface to be coated may be guided past the stream of high-energy ions once or more than once in a process chamber, to form one or more layers.
  • a plasma is used to introduce a gas mixture into the process chamber, in which the material parts to be coated are present.
  • the gases introduced react chemically with one another and lead to a thin condensed layer on the surfaces of the material parts to be coated.
  • the task of the complete layer system comprising the base body 1 , the adhesion promoting layer 3 , the intermediate layer 4 and the amorphous hydrocarbon layer 5 , is to reduce the friction between this coating and an opposing body, for example the middle plate 7 of the fuel feed unit 6 , and increase the service life of the coated cam plate 1 and also that of the opposing body.
  • the amorphous hydrocarbon layer 5 therefore preferably has a hydrogen fraction of at most 20 atomic %, whereby little tendency to adhere to the metallic opposing body, a high abrasive wear resistance, a high chemical resistance, high mechanical strengths and high hardness/modulus of elasticity ratios are ensured. Otherwise, the amorphous hydrocarbon layer 5 comprises sp 2 - and sp 3 -hybridized carbon, process-related impurities of less than 1 atomic % preferably being provided.
  • the amorphous hydrocarbon layer 5 preferably has a layer thickness of approximately 1.0 ⁇ m to 4.0 ⁇ m.
  • the total thickness of the coating, comprising the individual layers 3 , 4 and 5 is preferably approximately 2.0 ⁇ m to 5.0 ⁇ m.
  • Such a thickness of the entire coating changes the dimensions of the machine or engine part or the cam plate 1 to such a small degree that no further processing is necessary and the surface structure or topography which has been set is retained.
  • the tribological tasks are undertaken by the surface of the coating, which by the set structure reduces the area of mixed friction and on account of the low-friction coating reduces the frictional force, and consequently the loads to which the surface is subjected.
  • the mechanical tasks are undertaken by the layer system together with the base body.
  • the opposing body in the present case for example the middle plate 7 of the feed unit 6 , may, in the interests of lightweight construction and cost saving, preferably be created from iron-carbon alloys.
  • low-viscosity, low-additive oils can be used.
  • minimal lubrication or an extended oil change interval can be accomplished.
  • the predetermined area 2 of the same is preferably cleaned, for example by means of bath cleaning in various cleaning baths, with a subsequent outgassing operation in a cleaning oven or the like.
  • the adhesive property of the coating on the base body is advantageously improved.
  • the coating temperature of the individual coating operations is around 200° C. and the outgassing temperature for the outgassing operation of the base body is around 240° C. These temperature ranges consequently lie below the tempering temperature of the sintered material of the cam plate 1 . As a result, the cam plate 1 advantageously does not undergo any loss of hardness or any distortion.
  • the present invention consequently provides a wear-resistant coating and a process for producing such a wear-resistant coating, it being possible to revert to the low-cost sintered material as a substrate, which however would not withstand the tribological loading without the coating according to the invention.
  • a sintered material with a coating according to the invention can be used, so that the component can be competitively produced by the sintering process.
  • the coating can be applied very uniformly and without any appreciable increase in roughness. As a result, the coating is possible without a specified allowance and without cost-intensive further processing.
  • the coating described above creates a tribological system which by the set structure reduces the area of mixed friction and on account of the low-friction coating reduces the frictional force, and consequently the loads to which the surface is subjected, and also increases the wear resistance.
  • valve gear components such as for example bucket tappets, hydraulic supporting and insertion elements, rolling bearing components, control pistons, release bearings, piston pins, bearing bushes, linear guides or the like, to be coated according to the invention.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Inorganic Chemistry (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Physical Vapour Deposition (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Chemical Vapour Deposition (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
US11/517,787 2005-09-10 2006-09-08 Wear-resistant coating and process for producing it Abandoned US20070059529A1 (en)

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DE102005043108 2005-09-10
DE102005043108.9 2005-09-10

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US (2) US20070059529A1 (fr)
EP (1) EP1767662B1 (fr)
JP (1) JP2007119907A (fr)
KR (1) KR20070029568A (fr)
CN (1) CN1928148A (fr)
AT (1) ATE452218T1 (fr)
DE (1) DE502006005651D1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100300281A1 (en) * 2007-05-14 2010-12-02 Robert Bosch Gmbh Retaining segment
US20120205875A1 (en) * 2009-08-13 2012-08-16 Marcus Kennedy Sliding element, in particular a piston ring, having a coating
US20130042845A1 (en) * 2009-11-02 2013-02-21 Marcus Kennedy Sliding element, in particular piston ring, and combination of a sliding element with a mating running element
US20140050932A1 (en) * 2011-03-29 2014-02-20 Schaeffler Technologies AG & Co. KG Method for producing a hardened, coated metal component
US20150240944A1 (en) * 2012-08-10 2015-08-27 Federal-Mogul Burscheid Gmbh Sliding element, in particular piston ring, having resistant coating
US20160017477A1 (en) * 2013-03-22 2016-01-21 Nittan Valve Co., Ltd. Dlc film coating and coated valve lifter
US20160356242A1 (en) * 2015-06-08 2016-12-08 GM Global Technology Operations LLC TiO2 APPLICATION AS BONDCOAT FOR CYLINDER BORE THERMAL SPRAY

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100897323B1 (ko) * 2007-05-30 2009-05-14 한국생산기술연구원 플라즈마 화학기상증착과 물리기상증착을 복합한 박막 코팅방법
DE102008019440A1 (de) * 2008-04-17 2009-10-22 FRÖTEK Kunststofftechnik GmbH Flügel einer Flügelzellenpumpe oder eines Flügelzellenkompressors
DE102010042862B4 (de) * 2010-10-25 2017-05-11 Battenfeld-Cincinnati Germany Gmbh Vorrichtung zum Führen und Formen eines extrudierten Kunststoffstranges
US9145787B2 (en) 2011-08-17 2015-09-29 General Electric Company Rotatable component, coating and method of coating the rotatable component of an engine
US20150053160A1 (en) * 2013-08-20 2015-02-26 Schaeffler Technologies Gmbh & Co. Kg Slider pad for roller finger follower
CN104512480A (zh) * 2013-09-28 2015-04-15 江苏锋华车辆科技有限公司 一种汽车耐磨涂层
EP3622188B1 (fr) * 2017-07-03 2021-09-08 H.E.F. Système mécanique comprenant un axe couplé a un palier, et procédé de fabrication d'un tel système
CN111979543B (zh) * 2020-07-03 2021-09-21 华南理工大学 一种基于摩擦诱导催化形成自润滑非晶碳膜的涂层材料及其制备方法
WO2023229112A1 (fr) * 2022-05-26 2023-11-30 현대제철 주식회사 Matériau d'acier revêtu de carbone et procédé de fabrication d'un tel matériau

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4842937A (en) * 1987-02-27 1989-06-27 Ernst Winter & Sohn (Gmbh & Co.) Method of depositing a wear-protective layer on a cutting tool and wear protective layer produced by the method
US5202156A (en) * 1988-08-16 1993-04-13 Canon Kabushiki Kaisha Method of making an optical element mold with a hard carbon film
US5368939A (en) * 1991-04-08 1994-11-29 Yoshida Kogyo K.K. Hard multilayer coated product and process for producing same
US5411797A (en) * 1988-04-18 1995-05-02 Board Of Regents, The University Of Texas System Nanophase diamond films
US6087025A (en) * 1994-03-29 2000-07-11 Southwest Research Institute Application of diamond-like carbon coatings to cutting surfaces of metal cutting tools
US6110329A (en) * 1996-06-25 2000-08-29 Forschungszentrum Karlsruhe Gmbh Method of manufacturing a composite material
US6180263B1 (en) * 1992-12-22 2001-01-30 Citizen Watch Co., Ltd. Hard carbon coating-clad base material
US6372303B1 (en) * 1997-06-16 2002-04-16 Robert Bosch Gmbh Method and device for vacuum-coating a substrate
US20030235006A1 (en) * 2002-06-24 2003-12-25 Ameen Mohammad Mahbubul Low friction, wear resistant coatings for high speed spindle motors in disk drive/storage applications
US6726993B2 (en) * 1997-12-02 2004-04-27 Teer Coatings Limited Carbon coatings, method and apparatus for applying them, and articles bearing such coatings
US6740393B1 (en) * 2000-04-12 2004-05-25 Balzers Aktiengesellschaft DLC coating system and process and apparatus for making coating system
US6881475B2 (en) * 2001-06-13 2005-04-19 Sumitomo Electric Industries, Ltd Amorphous carbon coated tool and fabrication method thereof

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3815457A1 (de) * 1988-05-06 1989-11-16 Sipra Patent Beteiligung Strickmaschine
US5237967A (en) * 1993-01-08 1993-08-24 Ford Motor Company Powertrain component with amorphous hydrogenated carbon film
JPH0994911A (ja) * 1995-09-29 1997-04-08 Ntn Corp 硬質カーボン膜成形体
US5672054A (en) * 1995-12-07 1997-09-30 Carrier Corporation Rotary compressor with reduced lubrication sensitivity
DE19726794A1 (de) * 1997-06-24 1999-01-07 Elektra Beckum Ag Wasser-Hochdruckreinigungsgerät
JP4251738B2 (ja) * 1998-12-25 2009-04-08 住友電気工業株式会社 硬質被膜及び被覆部材
JP2001225412A (ja) * 2000-02-16 2001-08-21 Token Thermotec:Kk 保護膜被覆部材
JP4560964B2 (ja) * 2000-02-25 2010-10-13 住友電気工業株式会社 非晶質炭素被覆部材
US6502991B2 (en) * 2001-03-14 2003-01-07 The Timken Company Rotary fluid bearing coatings and coining and processes for manufacturing the same
US6994474B2 (en) * 2001-05-29 2006-02-07 Nsk Ltd. Rolling sliding member and rolling apparatus
JP2003148294A (ja) * 2001-11-12 2003-05-21 Hitachi Ltd 燃料ポンプ及び筒内噴射エンジン
JP2003214444A (ja) * 2002-01-22 2003-07-30 Nsk Ltd 転がり摺動部材および転動装置
DE10203730B4 (de) * 2002-01-30 2010-09-16 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren zur Abscheidung von metallfreien Kohlenstoffschichten
JP2004092790A (ja) * 2002-08-30 2004-03-25 Nsk Ltd 油圧ポンプ用転がり軸受
US6969198B2 (en) * 2002-11-06 2005-11-29 Nissan Motor Co., Ltd. Low-friction sliding mechanism
JP4539205B2 (ja) * 2003-08-21 2010-09-08 日産自動車株式会社 冷媒圧縮機
US7195817B2 (en) * 2003-09-29 2007-03-27 General Motors Corporation Diamond coated article and method of its production
JP2005147244A (ja) * 2003-11-14 2005-06-09 Koyo Seiko Co Ltd ころ軸受用保持器の製造方法およびころ軸受用保持器
JP2006138404A (ja) * 2004-11-12 2006-06-01 Kobe Steel Ltd 水系環境下での耐摩耗性に優れた摺動部材

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4842937A (en) * 1987-02-27 1989-06-27 Ernst Winter & Sohn (Gmbh & Co.) Method of depositing a wear-protective layer on a cutting tool and wear protective layer produced by the method
US5411797A (en) * 1988-04-18 1995-05-02 Board Of Regents, The University Of Texas System Nanophase diamond films
US5202156A (en) * 1988-08-16 1993-04-13 Canon Kabushiki Kaisha Method of making an optical element mold with a hard carbon film
US5368939A (en) * 1991-04-08 1994-11-29 Yoshida Kogyo K.K. Hard multilayer coated product and process for producing same
US6180263B1 (en) * 1992-12-22 2001-01-30 Citizen Watch Co., Ltd. Hard carbon coating-clad base material
US6087025A (en) * 1994-03-29 2000-07-11 Southwest Research Institute Application of diamond-like carbon coatings to cutting surfaces of metal cutting tools
US6110329A (en) * 1996-06-25 2000-08-29 Forschungszentrum Karlsruhe Gmbh Method of manufacturing a composite material
US6372303B1 (en) * 1997-06-16 2002-04-16 Robert Bosch Gmbh Method and device for vacuum-coating a substrate
US6726993B2 (en) * 1997-12-02 2004-04-27 Teer Coatings Limited Carbon coatings, method and apparatus for applying them, and articles bearing such coatings
US6740393B1 (en) * 2000-04-12 2004-05-25 Balzers Aktiengesellschaft DLC coating system and process and apparatus for making coating system
US6881475B2 (en) * 2001-06-13 2005-04-19 Sumitomo Electric Industries, Ltd Amorphous carbon coated tool and fabrication method thereof
US20030235006A1 (en) * 2002-06-24 2003-12-25 Ameen Mohammad Mahbubul Low friction, wear resistant coatings for high speed spindle motors in disk drive/storage applications

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100300281A1 (en) * 2007-05-14 2010-12-02 Robert Bosch Gmbh Retaining segment
US8555773B2 (en) * 2007-05-14 2013-10-15 Robert Bosch Gmbh Retaining segment
US20120205875A1 (en) * 2009-08-13 2012-08-16 Marcus Kennedy Sliding element, in particular a piston ring, having a coating
US9611543B2 (en) * 2009-08-13 2017-04-04 Federal-Mogul Burscheid Gmbh Sliding element having a coating
US20130042845A1 (en) * 2009-11-02 2013-02-21 Marcus Kennedy Sliding element, in particular piston ring, and combination of a sliding element with a mating running element
US10131988B2 (en) * 2009-11-02 2018-11-20 Federal-Mogul Burscheid Gmbh Sliding element, in particular piston ring, and combination of a sliding element with a mating running element
US20140050932A1 (en) * 2011-03-29 2014-02-20 Schaeffler Technologies AG & Co. KG Method for producing a hardened, coated metal component
US20150240944A1 (en) * 2012-08-10 2015-08-27 Federal-Mogul Burscheid Gmbh Sliding element, in particular piston ring, having resistant coating
US9476504B2 (en) * 2012-08-10 2016-10-25 Federal-Mogul Burscheid Gmbh Sliding element, in particular piston ring, having resistant coating
US20160017477A1 (en) * 2013-03-22 2016-01-21 Nittan Valve Co., Ltd. Dlc film coating and coated valve lifter
US9657384B2 (en) * 2013-03-22 2017-05-23 Nittan Valve Co., Ltd. DLC film coating and coated valve lifter
US20160356242A1 (en) * 2015-06-08 2016-12-08 GM Global Technology Operations LLC TiO2 APPLICATION AS BONDCOAT FOR CYLINDER BORE THERMAL SPRAY

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US7824733B2 (en) 2010-11-02
CN1928148A (zh) 2007-03-14
EP1767662A2 (fr) 2007-03-28
JP2007119907A (ja) 2007-05-17
EP1767662B1 (fr) 2009-12-16
EP1767662A3 (fr) 2007-06-20
US20080282836A1 (en) 2008-11-20
KR20070029568A (ko) 2007-03-14

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