EP1048825B1 - Verfahren zur Ausbildung einer verschleissfesten Beschichtung in/an Bauteilen einer Brennkraftmaschine, insbesondere Ventilsitz - Google Patents
Verfahren zur Ausbildung einer verschleissfesten Beschichtung in/an Bauteilen einer Brennkraftmaschine, insbesondere Ventilsitz Download PDFInfo
- Publication number
- EP1048825B1 EP1048825B1 EP00108215A EP00108215A EP1048825B1 EP 1048825 B1 EP1048825 B1 EP 1048825B1 EP 00108215 A EP00108215 A EP 00108215A EP 00108215 A EP00108215 A EP 00108215A EP 1048825 B1 EP1048825 B1 EP 1048825B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- metal
- valve seat
- diamond
- combustion engine
- parts
- 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.)
- Expired - Lifetime
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Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
- F01L3/02—Selecting particular materials for valve-members or valve-seats; Valve-members or valve-seats composed of two or more materials
- F01L3/04—Coated valve members or valve-seats
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
Definitions
- the invention relates to the preamble of the independent Claiming a method for forming a wear-resistant Coating on preformed surfaces of valve train parts Internal combustion engine, wherein a diamond - metal composite thermally is arranged.
- Such a coating with a diamond-nickel composite is in the generic US 5, 441, 024, which are used to increase the Wear resistance with permanently small play on a valve stem a gas exchange valve of an internal combustion engine is provided.
- the Coating takes place on a catalytically active surface of the Gas exchange valve de-energized with heat at temperatures up to about 95 ° C.
- a powdered bronze with diamond particles is used in one of the US 3,879,175 known coating method for producing hard, bearing treads applied to the workpiece and under light pressure
- the bronze melted at about 750 ° C
- 501 is further a method for forming a Wear-resistant coating on both a separately used Valve seat as well as on an associated poppet valve of an internal combustion engine known, wherein in each of said components initially in a carbonaceous atmosphere by means of energy supply to the respective component - Surface a layer of artificial diamonds is generated. In one subsequent process step, this layer is made of artificial Diamonds coated with a metal to achieve the required tribological properties.
- This method is disadvantageous consuming, as a further disadvantage, the relatively thin, only a few atomic layers thick layers are to be called, which are at a strong elastic or plastic deformation of the component substrate are damaged.
- a metal matrix diamond particles in a particle size of 40 - 163 ⁇ m in one Add volume fraction of 24 - 60% is known from GB 2 201 425. This describes a method of forming a resistant Coating of a diamond - metal composite on / on one Tool, wherein the diamond-containing composite material by means of Flame spraying applied to the tool and then under relative high pressure and electrical resistance heating thermally cohesively is connected to the tool by sintering.
- PCT / EP 96/04 341 describes and shows a coating method for a Tool in which a sprayed diamond metal powder of impact of a laser exposed to adhesion to the tool surface is melted.
- US 5,848,348 describes a diamond metal coating process - Matrix known in which a metal or metal carbide matrix without Application of pressure with the help of microwaves formed into a sintered body becomes.
- the invention is based on the object, the generic method so further develop that in / on valve train parts of an internal combustion engine a high wear-resistant, heat-dissipating and mechanically resistant Coating is achieved with relatively less effort.
- the invention is for a directly in a cylinder head of a Aluminum alloy machined valve seat a beneficial cohesive material composite between the aluminum base material of the Cylinder head and the claimed coating achieved with the other advantageously the characteristic properties of diamond, such as. B. the high hardness, the high thermal conductivity and the good tribological properties Property characteristics with the advantageous properties of the claimed Copper - titanium matrix are combined, with the chosen matrix especially due to their high affinity to the aluminum base material the thermal Conductivity of the metal advantageously wetted diamond particles advantageous supported.
- thermal conductivity of diamond or diamond particles is on the EP 0 364 155 A2, according to the example in a copper or Aluminum matrix embedded diamond particles as Heat dissipation device serve.
- the invention is based on a cylinder head shown in the drawing with integrally formed valve seat made of a light metal for an internal combustion engine described.
- An only schematically illustrated cross-flow cylinder head 1 for a not shown Internal combustion engine is made of an aluminum alloy and has an inlet channel 2 and a diametrically arranged outlet channel 3.
- the Gas exchange channels 2 and 3 are controlled by means not shown poppet valves.
- each channel 2, 3 is assigned a valve seat 4 on the combustion chamber side.
- Each valve seat 4 is in its geometric configuration initially by a Machining process directly in the edge region of each gas exchange channel 2, 3 formed in the cylinder head 1.
- each valve seat 4 according to the invention with a Diamond-metal composite coated, coating 5.
- diamond metal composite material preferably comprises a hartlotieri metal matrix of a copper-titanium compound, wherein each of said metals first pulverized and the mixed metal powder or alloyed mechanically or thermally or prealloyed.
- This copper-titanium powder will be diamond particles with a grain size of for example 5 microns in a volume fraction of For example, 45% added, with the titanium content zwichen 5 - 15% Weight shares.
- This diamond-metal powder is under a protective gas atmosphere, for example Argon atmosphere, in through a high-energy beam, for example a laser, in the surface region of a valve seat 4 produced melting introduced for thermally cohesive material connection with the base material of the cylinder head 1.
- a protective gas atmosphere for example Argon atmosphere
- a high-energy beam for example a laser
- the application of the coating 5 takes place continuously, whereby e.g. the cylinder head 1 about the axis of the respective poppet valve for respective valve seat 4 is rotated or a corresponding beam guide is selected.
- This mixed with diamond particles copper-titanium compound can be in an advantageous Way without an intermediate layer on a light metal component, such. one Cylinder head, are applied, whereby a simpler method is achieved.
- the final shaping of the coated valve seat 4 takes place by means of grinding and / or polishing.
- the preferred Metals copper and titanium are also pulverized, which is a polymeric binder is added.
- Diamond particles in the above-mentioned Size and in the aforementioned volume fraction can be added. This thus formed diamond metal powder is in the order in a surface area of the component held by means of the polymeric binder on the surface, wherein the applied coating then after a chemical and / or thermal Debinding by means of a high-energy beam - electron beam or Laser - on the surface reflowed / melted to form the adherent Coating 5 on the cylinder head 1.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Description
Claims (2)
- Verfahren zur Ausbildung einer verschleißfesten Beschichtung an vorgeformten Oberflächen von Ventiltriebteilen einer Brennkraftmaschine,wobei ein Diamant- Metall- Verbundwerkstoff thermisch angeordnet wird,dass ein durch ein spanabhebendes Verfahren unmittelbar in einem Randbereich eines Gaswechselkanals (2,3) in einem Brennkraftmaschinen- Zylinderkopf (1) aus einem Leichtmetall ausgebildeter Ventilsitz (4) mit einem mit Diamantpartikeln versetzten Kupfer-Titan-Pulver beschichtet wird, dasunter einer Schutzgasatmosphäre in eine im Oberflächenbereich des Ventilsitzes (4) mittels eines energiereichen Strahles erzeugte Aufschmelzung eingebracht wird zur thermisch stoffschlüssigen Verbindung mit dem Leichtmetall, wobeider aus einem pulverisierten Hartlot gebildeten Kupfer-Titan- Metallmatrix Diamantpartikel von D=1µm - 15µm in einem Volumenanteil von 10 - 60 % zugesetzt werden undder Titananteil zwischen 5 - 15 % Gewichtsanteile beträgt, unddie endgültige Formgebung des beschichteten Ventilsitzes (4) mittels Schleifen und/oder Polieren erzielt wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass der Diamant- Metall- Verbundwerkstoff auf der Basis von Kupfer auch mit Vanadium oder Chrom oder Zirkon gebildet werden kann.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19918813 | 1999-04-26 | ||
DE19918813 | 1999-04-26 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1048825A1 EP1048825A1 (de) | 2000-11-02 |
EP1048825B1 true EP1048825B1 (de) | 2004-12-08 |
Family
ID=7905843
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00108215A Expired - Lifetime EP1048825B1 (de) | 1999-04-26 | 2000-04-14 | Verfahren zur Ausbildung einer verschleissfesten Beschichtung in/an Bauteilen einer Brennkraftmaschine, insbesondere Ventilsitz |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1048825B1 (de) |
DE (1) | DE50008880D1 (de) |
ES (1) | ES2228329T3 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10353473B4 (de) * | 2003-11-15 | 2007-02-22 | Daimlerchrysler Ag | Bauteil einer Brennkraftmaschine und Verfahren zu dessen Herstellung |
DE102018212909B4 (de) * | 2018-08-02 | 2022-12-29 | Ford Global Technologies, Llc | Verfahren zur Ausbildung eines Ventilsitzes eines Zylinderkopfs, sowie mit dem Verfahren bearbeiteter Ventilsitzbereich des Zylinderkopfs |
DE102019123456A1 (de) * | 2019-09-02 | 2021-03-04 | Federal-Mogul Valvetrain Gmbh | Tellerventil mit kern und verfahren zu deren herstellung |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3879175A (en) * | 1971-06-24 | 1975-04-22 | De Beers Ind Diamond | Bearing bodies and methods of forming bearing surfaces |
DE3635369A1 (de) * | 1986-10-17 | 1988-04-28 | Degussa | Verfahren zum beschichten von oberflaechen mit hartstoffen |
CH672320A5 (de) * | 1987-02-27 | 1989-11-15 | Inst Nadezhnosti I Dolgovechno | |
US5040501A (en) | 1987-03-31 | 1991-08-20 | Lemelson Jerome H | Valves and valve components |
US5368890A (en) * | 1992-09-01 | 1994-11-29 | De Nagybaczon; Erno N. | "Coating process for depositing extremely hard films on substrates" |
US5492769A (en) * | 1992-09-17 | 1996-02-20 | Board Of Governors Of Wayne State University | Method for the production of scratch resistance articles and the scratch resistance articles so produced |
US5441024A (en) * | 1994-05-09 | 1995-08-15 | Val-Kro, Inc. | Engine valve |
US5848348A (en) * | 1995-08-22 | 1998-12-08 | Dennis; Mahlon Denton | Method for fabrication and sintering composite inserts |
JP3894574B2 (ja) * | 1995-10-05 | 2007-03-22 | ベーエルツェー バイエリッシェス ラザーツェントルム ゲマインニュッツィゲ フォルシュングスゲゼルシャフト ミット ベシュレンクテル ハフツング | 切削工具を製造するための方法 |
-
2000
- 2000-04-14 ES ES00108215T patent/ES2228329T3/es not_active Expired - Lifetime
- 2000-04-14 EP EP00108215A patent/EP1048825B1/de not_active Expired - Lifetime
- 2000-04-14 DE DE2000508880 patent/DE50008880D1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
ES2228329T3 (es) | 2005-04-16 |
EP1048825A1 (de) | 2000-11-02 |
DE50008880D1 (de) | 2005-01-13 |
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