EP3268506A1 - Verfahren für eine definierte oberflächenbearbeitung einer auf einer oberfläche eines bauteils aufgebrachten ersten kohlenstoffbeschichtung - Google Patents
Verfahren für eine definierte oberflächenbearbeitung einer auf einer oberfläche eines bauteils aufgebrachten ersten kohlenstoffbeschichtungInfo
- Publication number
- EP3268506A1 EP3268506A1 EP16709760.9A EP16709760A EP3268506A1 EP 3268506 A1 EP3268506 A1 EP 3268506A1 EP 16709760 A EP16709760 A EP 16709760A EP 3268506 A1 EP3268506 A1 EP 3268506A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- carbon coating
- μιη
- carbon
- component
- coating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- 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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/58—After-treatment
- C23C14/5873—Removal of material
- C23C14/588—Removal of material by mechanical treatment
Definitions
- the present invention relates to a method for a defined surface treatment of a first carbon coating applied to a surface of a component.
- the present invention is therefore based on the object to develop a method with which a smoothing of carbon-coated surfaces succeeds with significantly higher efficiency or to provide a correspondingly smoothed component.
- the first carbon coating is brought into contacting contact with at least one second carbon coating formed on a surface of a tool.
- the first carbon coating and the second carbon coating are moved relatively parallel to each other so that the first carbon coating is smoothed with the second carbon coating.
- the first carbon coating and / or the second carbon coating is formed of a-C (amorphous carbon) or ta-C (tetrahedral bonded amorphous carbon).
- the method is based on the fact that with a pairing of two surfaces provided with carbon layers, these carbon layers mutually smooth in the relative movement, until substantially smoother outer surfaces of the carbon layers than before result. This can be on a Use of a lapping or polishing agent or an addition of a fluid can be dispensed with.
- a smoothing of the first carbon coating is achieved cost-effectively.
- a smoothed surface of the first carbon coating is achieved, so that after installation during operation of the component in its intended use no or less harmful for this use wear particles are released.
- At least two second carbon coatings are used to smooth the first carbon coating and smooth itself in interaction with the first carbon coating.
- a first carbon coating and a second carbon coating of a hard carbon having a hardness of at least 2000 HV is used to perform the process, since such hard carbon coatings are hardly cost-effectively smoothed by conventional methods.
- a hardness of the first carbon coating is different from a hardness of the second carbon coating and / or deviates by a maximum of ten percent, preferably by a maximum of five percent, particularly preferably by a maximum of two percent from a hardness of the second carbon coating. Due to the fact that the two carbon coatings of the same hardness pair, it no longer comes to a wear removal to the disadvantage of a softer partner or to an insufficient smoothing of a harder partner.
- the first carbon coating and the second carbon coating may be moved relative to each other in an exclusively linearly one-way movement.
- a linearly oscillating, rotating or chaotic relative movement ie an arbitrary sequence of the aforementioned sliding movements, in order to produce a surface contact for smoothing for a sufficiently long time.
- a contact pressure between 0.5 N / mm 2 and 500 N / mm 2, preferably between 1 N / mm 2 and 100 N / mm 2 is used to achieve a sufficiently fast smoothing.
- the first carbon coating and / or the second carbon coating is deposited by a vacuum arc coating process.
- the first carbon coating at an ambient temperature between 18 ° C and 25 ° C, ie at room temperature is smoothed. An energy-intensive heating of a receiving unit for the component and the tool for carrying out the method is thus eliminated.
- the first carbon coating and the second carbon coating are smoothed only by the relative movement to each other and no further aids or substances are needed. There is therefore no need for a machining tool as long as the carbon coatings to be smoothed are exposed to relative movement with respect to one another, which permits adequate smoothing of the required locations and at the same time does not lead to damage to sensitive areas, e.g. B. sharp edges of the component leads.
- an iron powder for assisting smoothing may be applied to the first carbon coating and / or the second carbon coating to exploit a chemical-catalytic effect of iron.
- the component is cleaned by a fluid of particles deposited during the smoothing.
- the fluid is typically a liquid, for example a solution, but may also be a gas.
- the tool is cleaned accordingly.
- At least one component with the properties described above can be introduced into a loose bed of several of the tools and connected with the workpieces. be moved to achieve efficient smoothing by several of the tools. It is thus possible to carry out a bulk material process. This is typically done in a take-up drum in which the component and tools are contained with their coatings and moved therein.
- the component and the tool or the tools may be formed of the same material in order to achieve a homogeneous smoothing.
- a component according to the invention has a first carbon coating in a smoothed state and at least one defect in the form of a depression.
- the at least one defect is generally caused by particles incorporated in the carbon coating during production, typically hard carbon particles, which have been removed from the coating during smoothing. Thus, the at least one defect remains as a depression in the carbon coating.
- the smoothed state should be reached after interaction with a second carbon coating.
- the first carbon coating may have the properties already described above.
- An R a roughness of the first carbon coating in the smoothed state should be between 0.03 ⁇ and 0.2 ⁇ , preferably between 0.05 ⁇ and 0.15 ⁇ .
- An R z roughness of the first carbon coating may be between 0.3 ⁇ and 2 ⁇ , preferably between 0.5 ⁇ and 1.5 ⁇ . The roughnesses mentioned allow a targeted use of the coated component.
- the first carbon coating typically has a thickness between 0.5 ⁇ and 30 ⁇ , preferably between 1 ⁇ and 5 ⁇ .
- the first carbon coating is formed of a hard carbon having a hardness of at least 2000 HV.
- the first carbon coating is deposited by a vacuum arc process.
- the at least one defect of the first carbon coating typically has a width of between 0.05 ⁇ and 10 ⁇ , preferably between 0.1 ⁇ and 3 ⁇ . It can also be provided that the at least one defect of the first carbon coating has a width, a length or a diameter which is greater than a thickness of the first carbon coating.
- the at least one defect may be present as a hole in the first carbon coating, ie as a depression which extends to a surface of the component under the first carbon coating. It can also be formed a variety of defects described in the first carbon coating.
- the first carbon coating has a carbon content of at least 95 percent, preferably at least 99 percent. Thus, apart from unavoidable soiling during manufacture or smoothing, no additional substances are contained in the first carbon coating.
- the component with the first carbon coating is typically produced by the described method or the first carbon coating is smoothed using the method described above.
- Fig. 1 shows a sectional view of a bulk material of a component and a plurality of tools, which are each provided with a carbon coating.
- a component 2 in the embodiment shown in Figure 1 a bolt for use in chain drives, was coated by means of a carbon arc process with a 2 ⁇ thick first carbon coating 1 type tetrahedral amorphous carbon (ta-C) as a carbon layer.
- This first carbon coating 1 has a hardness of 6000 HV.
- An outer surface of this first carbon coating 1 has a roughness R z of 1.5 ⁇ .
- the first carbon coating 1 is applied to one of the surfaces of the component 2, in further embodiments However, the component 2 can also be completely encased by the first carbon coating 1.
- At least one tool 4 is provided in the same way with a second carbon coating 3, which has the same properties as the first
- Carbon coating 1 has. In other exemplary embodiments, however, the hardness of the first carbon coating 1 may also differ by up to a maximum of ten percent from the hardness of the second carbon coating 3. Likewise, a thickness of the second carbon coating 3 may also deviate from the thickness of the first carbon coating 1.
- the tool 4 can be coated as an auxiliary body during smoothing in the same coating process as the component to be processed 1 and be used by repeated coating several times in the described method. In further embodiments, as the tools 4, more of the components 2 may be used.
- the component 2 is given together with several of the tools 4 as shown in Figure 1 in a drum 6 with drivers on a drum wall, which then rotates about its horizontal longitudinal axis.
- the drum 6 is closable, so that there is a closed space, which is bounded by the drum walls. In this closed room there is a temperature of 20 ° C and a contact pressure of 0.5 N / mm 2 is used.
- the rotational movement results in a bulk material movement of the quantity of the component 2 and of the tools 4 in the drum 6, which is embodied as a loose bed, and thus relative movement of the component 2 provided with the first carbon coating 1 and the tools 4 which are connected to the second carbon coating 3 are provided.
- the described method thus operates at room temperature without the use of a lapping or polishing agent and without the addition of a fluid for smoothing.
- a movement may take place in a linear manner exclusively in one direction, an oscillating linear movement or a chaotic movement without a predetermined pattern.
- At least some, but also all of the first carbon coatings 1 and / or the second carbon coatings 2 may have recesses 7 resulting from hard carbon particles in producing the respective carbon coating 1, 2 by the vacuum arc method. The hard carbon particles are broken out of the respective carbon coating 1, 2 during smoothing and the recess 7 remains as a defect of the respective layer.
- the recess 7 or, since there are usually several defects, the recesses 7 of the respective carbon coating 1, 2 have a width of on average 1 ⁇ .
- the process can be carried out without the addition of auxiliaries, but it is also possible to apply an iron powder 5 in the drum 6 and / or on an outer surface of the carbon coatings 1, 3, in order to support the smoothing by a chemical-catalytic effect of the iron ,
- both the first carbon coating 1 and the second carbon coating 2 have a carbon content of
- suitable processes for the method described are also used in vibratory finishing, ie z. B. drum sliding, vibratory sliding and centrifugal clamping.
- the prerequisite is that the component 2, as the part to be smoothed, is largely coated with carbon on its surface, that is to say, for example, to at least 60 percent, since otherwise damage to the uncoated areas, ie, roughening, occurs.
- the component 2 provided with the first carbon coating 1 is a sliding component such as a piston pin, a chain sleeve or a bucket tappet. It can generally be used for automotive applications, ie applications in passenger cars or commercial vehicles, or motorcycles in their engines, powertrains, pumps, fuel injection and
- Auxiliary units in particular chain drive components, piston pins, valve train components or gears are used.
- components of stationary pumps such as pump pistons, shafts or tappets, or carbon-coated machine components such as gears, guide rails, shafts or machines can be used.
- Processing and processing machines eg. B. in textile machines and in machines of the paper and printing industry are processed by the described method.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Paints Or Removers (AREA)
- Physical Vapour Deposition (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015204395.9A DE102015204395A1 (de) | 2015-03-11 | 2015-03-11 | Verfahren für eine definierte Oberflächenbearbeitung einer auf einer Oberfläche eines Bauteils aufgebrachten ersten Kohlenstoffbeschichtung |
PCT/EP2016/055147 WO2016142473A1 (de) | 2015-03-11 | 2016-03-10 | Verfahren für eine definierte oberflächenbearbeitung einer auf einer oberfläche eines bauteils aufgebrachten ersten kohlenstoffbeschichtung |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3268506A1 true EP3268506A1 (de) | 2018-01-17 |
Family
ID=55527555
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16709760.9A Pending EP3268506A1 (de) | 2015-03-11 | 2016-03-10 | Verfahren für eine definierte oberflächenbearbeitung einer auf einer oberfläche eines bauteils aufgebrachten ersten kohlenstoffbeschichtung |
Country Status (4)
Country | Link |
---|---|
US (1) | US10633735B2 (de) |
EP (1) | EP3268506A1 (de) |
DE (1) | DE102015204395A1 (de) |
WO (1) | WO2016142473A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102019213573A1 (de) * | 2019-09-06 | 2021-03-11 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Verfahren zur Ausbildung einer mit ta-C gebildeten Schicht oder einer mit mindestens einer mit ta-C gebildeten Schicht gebildeten Beschichtung sowie damit ausgebildet ta-C-Schicht oder Beschichtung |
DE102020210952B3 (de) * | 2020-08-31 | 2021-10-21 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung eingetragener Verein | Verfahren zur Herstellung einer Verzahnung an rotationssymmetrischen Oberflächen metallischer Antriebselemente |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5846122A (en) * | 1995-04-25 | 1998-12-08 | Lucent Technologies Inc. | Method and apparatus for polishing metal-soluble materials such as diamond |
JP2006009080A (ja) * | 2004-06-25 | 2006-01-12 | Hitachi Ltd | 摺動部材及び該摺動部材の表面処理方法 |
DE102006010916A1 (de) * | 2006-03-01 | 2007-09-06 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Verfahren zur Bearbeitung von Oberflächen einer Beschichtung aus hartem Kohlenstoff |
US8691364B2 (en) * | 2006-10-13 | 2014-04-08 | National Institute Of Advanced Industrial Science And Technology | Laminate, and polishing material and grinding material using the same, and method for producing the laminate |
DE102011076410A1 (de) * | 2011-05-24 | 2012-11-29 | Schaeffler Technologies AG & Co. KG | Maschinenelement |
DE102012211864A1 (de) * | 2012-07-06 | 2014-05-22 | Mahle International Gmbh | Verfahren zur Herstellung/Bearbeitung eines Nockens |
-
2015
- 2015-03-11 DE DE102015204395.9A patent/DE102015204395A1/de active Pending
-
2016
- 2016-03-10 EP EP16709760.9A patent/EP3268506A1/de active Pending
- 2016-03-10 WO PCT/EP2016/055147 patent/WO2016142473A1/de active Application Filing
- 2016-03-10 US US15/557,278 patent/US10633735B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
US20180051367A1 (en) | 2018-02-22 |
DE102015204395A1 (de) | 2016-09-15 |
US10633735B2 (en) | 2020-04-28 |
WO2016142473A1 (de) | 2016-09-15 |
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Owner name: FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V. |