EP1341946B1 - Verschleisschutzschicht für kolbenringe enthaltend wolframkarbid und chromkarbid - Google Patents
Verschleisschutzschicht für kolbenringe enthaltend wolframkarbid und chromkarbid Download PDFInfo
- Publication number
- EP1341946B1 EP1341946B1 EP01270182A EP01270182A EP1341946B1 EP 1341946 B1 EP1341946 B1 EP 1341946B1 EP 01270182 A EP01270182 A EP 01270182A EP 01270182 A EP01270182 A EP 01270182A EP 1341946 B1 EP1341946 B1 EP 1341946B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- chromium
- carbides
- piston ring
- carbide
- powder
- 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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- 239000002347 wear-protection layer Substances 0.000 title claims description 19
- 229910003470 tongbaite Inorganic materials 0.000 title claims description 14
- UFGZSIPAQKLCGR-UHFFFAOYSA-N chromium carbide Chemical compound [Cr]#C[Cr]C#[Cr] UFGZSIPAQKLCGR-UHFFFAOYSA-N 0.000 title claims description 11
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 title claims description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 32
- 239000000843 powder Substances 0.000 claims description 27
- -1 chromium carbides Chemical class 0.000 claims description 25
- 229910052804 chromium Inorganic materials 0.000 claims description 21
- 239000011651 chromium Substances 0.000 claims description 21
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 18
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims description 17
- 239000010410 layer Substances 0.000 claims description 16
- 229910052759 nickel Inorganic materials 0.000 claims description 16
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 14
- 229910052750 molybdenum Inorganic materials 0.000 claims description 14
- 239000011733 molybdenum Substances 0.000 claims description 14
- 229910052721 tungsten Inorganic materials 0.000 claims description 14
- 239000010937 tungsten Substances 0.000 claims description 14
- 150000001247 metal acetylides Chemical class 0.000 claims description 11
- 229910045601 alloy Inorganic materials 0.000 claims description 10
- 239000000956 alloy Substances 0.000 claims description 10
- 238000002485 combustion reaction Methods 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 229910017052 cobalt Inorganic materials 0.000 claims description 4
- 239000010941 cobalt Substances 0.000 claims description 4
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000005507 spraying Methods 0.000 claims 6
- WAIPAZQMEIHHTJ-UHFFFAOYSA-N [Cr].[Co] Chemical class [Cr].[Co] WAIPAZQMEIHHTJ-UHFFFAOYSA-N 0.000 claims 1
- 238000007670 refining Methods 0.000 claims 1
- 239000011159 matrix material Substances 0.000 description 10
- 239000002245 particle Substances 0.000 description 5
- 229910018487 Ni—Cr Inorganic materials 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- 238000000227 grinding Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000011241 protective layer Substances 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 2
- 238000010285 flame spraying Methods 0.000 description 2
- 238000007751 thermal spraying Methods 0.000 description 2
- 239000004563 wettable powder Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000011195 cermet Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000007749 high velocity oxygen fuel spraying Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910000623 nickel–chromium alloy Inorganic materials 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000007750 plasma spraying Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Images
Classifications
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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
- 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
-
- 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
- C23C30/00—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12181—Composite powder [e.g., coated, etc.]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12486—Laterally noncoextensive components [e.g., embedded, etc.]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
- Y10T428/12806—Refractory [Group IVB, VB, or VIB] metal-base component
- Y10T428/12826—Group VIB metal-base component
- Y10T428/1284—W-base component
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
- Y10T428/12806—Refractory [Group IVB, VB, or VIB] metal-base component
- Y10T428/12826—Group VIB metal-base component
- Y10T428/12847—Cr-base component
Definitions
- the present invention relates to a piston ring for internal combustion engines at least one peripheral surface of the piston ring by means of thermal spraying applied wear protection layer, essentially consisting of chrome carbides, Tungsten carbide, chrome and nickel.
- the running surfaces of piston rings in internal combustion engines are subject to wear during use.
- a protective layer is applied to the running surfaces of the piston rings to minimize wear.
- the coating material which is in the form of a powder, is melted by means of an oxygen / fuel spray gun and sprayed onto the piston ring.
- EP 0 960 954 A2 discloses a corresponding powder for producing these wear protection layers. This powder contains nickel, chromium and carbon, whereby the chromium can be present as chromium carbide and as a nickel-chromium alloy.
- the carbides are present in an already decomposed form, so that the matrix becomes brittle and the carbides lose hardness due to conversion from Cr3C2 to Cr7C3 or even to Cr23C6.
- DE 197 20 627 A1 mixes 20 to 80% by volume of molybdenum with the wettable powder. Molybdenum has a relatively high toughness and can therefore stop crack growth.
- the patent application discloses preferred coatings of sintered chromium carbide and nickel chromium powders with up to 100% by weight of molybdenum.
- phase of molybdenum are formed in the resulting layer, which are approximately the size of the starting powder and generally have a diameter of 5 to 50 ⁇ m.
- the relatively low abrasion resistance of the molybdenum has a negative effect, the molybdenum phases are preferably worn out and consequently the wear resistance of the protective layer decreases.
- tungsten carbides are also embedded in the matrix of the wear protection layer.
- European patent EP 0 512 805 B1 describes the formation of a surface protection with chromium and tungsten carbides, the embedded tungsten-chromium carbides having a particle size in the range from 25 to 100 ⁇ m.
- Tungsten carbides are harder than chrome carbides and have a very high resistance to pressure and wear.
- the extraordinarily hard tungsten carbides also show a clear disadvantage when processing the surface produced. The surface can no longer be processed with conventional grinding wheels, processing is only possible with very high quality and at the same time expensive grinding wheels.
- EP -A- 0657237 discloses a thermal wettable powder consisting of Tungsten carbide particles which are connected by metallic cobalt are.
- a second type of grains consisting of chrome carbide particles connected to each other via a Ni-Cr alloy.
- the protective layer is for High pressure valves, petrochemical lines, seats in pumps etc. are used. A Application for piston rings is not mentioned.
- a coating for piston rings can be found in US-A-3606359 different microstructure than in the present application. There will be two various powders sprayed from previously sintered particles; an indication of the The size of the particles for the carbides is not mentioned.
- the invention is based on the object belonging to the prior art To overcome disadvantages and to produce a piston ring for internal combustion engines, which has a wear protection layer on the tread that is almost crack-free and a has high wear resistance.
- the wear protection layer according to the invention for the running surface of the piston ring is formed from a powder mixture in which the first powder as agglomerated and sintered powder consists at least of the alloy components chromium carbide, chromium and nickel, which does not have any subsequent embrittling heat treatment such as, for. B.
- the carbides in the powder having an average diameter which is less than 3 microns and a second powder, which is also present as an agglomerated and sintered powder and contains tungsten carbide as an essential feature and by thermal spraying on at least a circumferential surface of the piston rings is applied, so that two distinguishable layer regions are produced in the wear protection layer, a first region which is primarily rich in chromium carbide and a second region which is mainly rich in tungsten carbide.
- the use of a powder with a carbide size of less than 3 ⁇ m is a significant difference to the conventionally used powders, whose average carbide size is over 5 ⁇ m, but mostly even over 10 ⁇ m.
- the carbide breakout is reduced, the risk of cracks is minimized and at the same time the residual stresses in the carbide are reduced, which in turn reduces the tendency to carbide breakdown.
- Another essential difference is the use of primary carbides in the starting powder, which are mainly in the form of blocky Cr3C2 and Cr7C3 carbides.
- the powders obtained via conventional melt atomization on the other hand, mostly have dendritic carbides and mostly dissolved carbides such as Cr23C6, which are much softer.
- two distinguishable layer areas form as the basis in the wear protection layer.
- the layer structure is disordered.
- the first layer area forms, for example, a matrix of nickel, chromium and molybdenum, in which chromium carbides and phases rich in molybdenum are embedded homogeneously and finely distributed.
- the molybdenum phases are only of a size of not larger than 5 ⁇ m, so that there are no wear-increasing phases in the matrix.
- tungsten and chromium carbides are clearly embedded in the nickel matrix.
- the average tungsten carbide has a diameter that is not larger than 1.5 ⁇ m and the chrome carbide has a diameter that is smaller than 3 ⁇ m, which supports machining.
- a ratio corresponding to this layer structure could, for example, consist of 2 parts of areas rich in tungsten carbide and 8 parts of areas rich in chromium carbide.
- Tests in real internal combustion engines have shown that a wear protection layer on the piston rings designed according to this example showed complete freedom from cracks and a wear behavior comparable to that of electroplated layers.
- a resultant advantage is that processing with complete absence of cracks is possible without problems with conventional grinding wheels, that is, finishing is not more expensive than with a conventional wear protection layer produced by means of today's plasma spraying techniques.
- the cobalt components in the alloy serve in particular as binders in the areas rich in tungsten carbide.
- the hard material phases chrome carbide and tungsten carbide are the carriers of hardness and determine, among other things, the wear properties, while the binder metal gives the wear protection layer the toughness.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
- Coating By Spraying Or Casting (AREA)
Description
Neben den Chrom-Karbiden werden auch Wolfram-Karbide in die Matrix der Verschleißschutzschicht mit eingelagert. Die europäische Patentschrift EP 0 512 805 B1 beschreibt die Bildung eines Oberflächenschutzes mit Chrom- und Wolfram-Karbiden, wobei die eingelagerten Wolfram-Chrom-Karbide eine Partikelgröße im Bereich von 25 - 100 µm aufweisen. Wolfram-Karbide sind härter als Chrom-Karbide und besitzen eine sehr hohe Druck- und Verschleißbeständigkeit. Die außergewöhnlich harten Wolfram-Karbide zeigen aber gleichzeitig einen deutlichen Nachteil bei der Bearbeitung der erzeugten Oberfläche. Die Oberfläche kann mit herkömmlichen Schleifscheiben nicht mehr bearbeitet werden, eine Bearbeitung ist lediglich mit sehr hochwertigen und gleichzeitig teuren Schleifscheiben möglich.
Der Einsatz eines Pulvers mit einer Karbidgröße von weniger als 3 µm ist ein wesentlicher Unterschied zu den herkömmlich eingesetzten Pulvern, deren mittlere Karbidgröße bei über 5 µm liegt, meistens jedoch sogar über 10 µm. Durch die Verringerung der Karbidgröße wird der Karbidausbruch verringert, die Rissgefahr wird minimiert und gleichzeitig werden die Eigenspannungen im Karbid reduziert was wiederum die Karbidzerrüttungstendenz verkleinert. Ein weiterer wesentlicher Unterschied ist der Einsatz von Primärkarbiden im Ausgangspulver, die vorwiegend als blockige Cr3C2- und Cr7C3-Karbide vorliegen. Die über die herkömmliche Schmelzverdüsung gewonnen Pulver weisen dagegen meist dendritische Karbide und vorwiegend aufgelöste Karbide wie zum Beispiel Cr23C6 auf, die sehr viel weicher sind.
Im zweiten sichtlich unterscheidbaren Schichtbereich sind in die Nickel-Matrix vernehmlich Wolfram- und Chrom-Karbide eingelagert. Dabei haben die Wolfram-Karbide im Mittel einen Durchmesser, der nicht größer als 1,5 µm ist und die Chrom-Karbide einen Durchmesser, der kleiner als 3 µm ist, wodurch die spanende Bearbeitung unterstützt wird. Ein diesem Schichtaufbau entsprechendes Verhältnis könnte beispielhaft aus 2-Teilen wolframkarbidreichen Bereichen und 8 Teilen chromkarbidreichen Bereichen bestehen. Versuche in realen Verbrennungsmotoren haben gezeigt, dass eine nach diesem Beispiel ausgebildete Verschleißschutzschicht auf den Kolbenringen eine völlige Rissfreiheit und ein annähernd mit galvanisch erzeugten Schichten vergleichbares Verschleißverhalten aufwies.
Durch die Überlagerung der beiden Schichtwerkstoffe in einer Verschleißschutzschicht ist es nun möglich, die relativ gute Bearbeitbarkeit der Chrom-Karbide mit der sehr hohen Verschleißbeständigkeit des Wolfram-Karbids kombinativ zu vereinen. Ein sich hieraus ergebender Vorteil ist, dass eine Bearbeitung bei völliger Rissfreiheit mit herkömmlichen Schleifscheiben problemlos möglich ist, dass heißt, eine Fertigbearbeitung ist nicht kostenintensiver als bei einer herkömmlichen, mittels heutiger Plasmaspritztechniken erzeugten Verschleißschutzschicht.
Die Cobaltanteile in der Legierung dienen insbesondere als Bindemittel in den wolframkarbidreichen Bereichen. Die Hartstoffphasen Chrom-Karbid und Wolfram-Karbid sind die Träger der Härte und bestimmen unter anderem die Verschleißeigenschaften, während das Bindemetall der Verschleißschutzschicht die Zähigkeit verleiht.
Claims (14)
- Kolbenring für Brennkraftmaschinen, mit auf mindestens eine Umfangsfläche des Kolbenringes mittels thermischem Spritzen aufgetragenen Verschleißschutzschicht, bestehend aus Chrom-Karbiden, Wolfram-Karbid, Chrom und Nickel, dadurch gekennzeichnet, dass die Verschleißschutzschicht aus einem Pulvergemisch gebildet ist, in dem das erste Pulver als agglomeriertes und gesintertes Pulver mindestens aus den Legierungskomponenten Chrom-Karbid, Chrom und Nickel besteht, das keine nachträgliche versprödende Wärmebehandlung wie z. B. eine Plasmaveredlung erfahren hat, wobei die Karbide im Pulver einen mittleren Durchmesser aufweisen, der kleiner als 3 µm ist und einem zweiten Pulver, das ebenfalls als agglomeriertes und gesintertes Pulver vorliegt und Wolfram-Karbid enthält, so dass in der Verschleißschutzschicht zwei unterscheidbare Schichtbereiche erzeugt werden, wobei sich ein erster vornehmlich chromkarbidreicher und ein zweiter hauptsächlich wolframkarbidreicher Bereich ausbildet.
- Kolbenring nach Anspruch 1, dadurch gekennzeichnet, dass das zweite Pulver zusätzlich Chrom, Kohlenstoff und Nickel enthält, so dass beim Spritzen wolframkarbidreiche Bereiche entstehen, in denen vornehmlich Wolfram-Karbide, Chrom-Karbide und Nickel vorliegen.
- Kolbenring nach einem der Ansprüche 1 und 2, dadurch gekennzeichnet, dass die Legierungsbestandteile in den wolframkarbidreichen Bereichen mit Anteilen an Kohlenstoff zwischen 8 und 11 %, an Nickel zwischen 6 und 8 %, an Chrom zwischen 18 und 24 % und der Rest an Wolfram vorhanden sind.
- Kolbenring nach Anspruch 1, dadurch gekennzeichnet, dass das zweite Pulver zusätzlich Nickel enthält, so dass beim Spritzen wolframkarbidreiche Bereiche entstehen, in denen vornehmlich Wolfram-Karbide und Nickel vorliegen.
- Kolbenring nach einem der Ansprüche 1 und 4, dadurch gekennzeichnet, dass die Legierungsbestandteile mit Anteilen an Kohlenstoff zwischen 4 und 6 %, an Nickel zwischen 11 und 18 % und der Rest an Wolfram vorhanden sind.
- Kolbenring nach Anspruch 1, dadurch gekennzeichnet, dass das zweite Pulver zusätzlich Cobalt und Chrom enthält, so dass beim Spritzen wolframkarbidreiche Bereiche entstehen, in denen vornehmlich Wolfram-Karbide in einer Cobalt-Chrom-Legierung vorliegen.
- Kolbenring nach einem der Ansprüche 1 und 6, dadurch gekennzeichnet, dass die Legierungsbestandteile mit Anteilen an Cobalt zwischen 6 und 18 %, an Chrom zwischen 0,01 und 9 % und der Rest an Wolfram vorhanden sind.
- Kolbenring nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die chromkarbidreichen Bereiche zwischen 7 und 10 % Kohlenstoff, 10 - 20 % Nickel, 1 - 10 % Molybdän und Rest Chrom enthalten.
- Kolbenring nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass der Anteil der wolframkarbidreichen Bereiche im Gemisch zwischen 1 und 95 Vol.-% beträgt.
- Kolbenring nach einem der Ansprüche 8 bis 9, dadurch gekennzeichnet, dass die Durchmesser der molybdänreichen Phasen in den chromkarbidreichen Bereichen nicht größer als 5 µm sind.
- Kolbenring nach einem der Ansprüche 8 bis 10, dadurch gekennzeichnet, dass die Wolfram-Karbide im Mittel nicht größer als 1,5 µm sind.
- Kolbenring nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass die Wolfram-Karbide als WC-Karbide vorliegen.
- Kolbenring nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, dass die Chrom-Karbide als Cr3C2-Karbide vorliegen.
- Kolbenring nach einem der Ansprüche 1 bis 13, dadurch gekennzeichnet, dass als thermisches Spritzverfahren das Hochgeschwindigkeits-Flammspritzen (HVOF) eingesetzt wird.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10061750A DE10061750B4 (de) | 2000-12-12 | 2000-12-12 | Wolframhaltige Verschleißschutzschicht für Kolbenringe |
| DE10061750 | 2000-12-12 | ||
| PCT/DE2001/004336 WO2002048422A1 (de) | 2000-12-12 | 2001-11-17 | VERSCHLEIssSCHUTZSCHICHT FÜR KOLBENRINGE ENTHALTEND WOLFRAMKARBID UND CHROMKARBID |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1341946A1 EP1341946A1 (de) | 2003-09-10 |
| EP1341946B1 true EP1341946B1 (de) | 2004-09-01 |
Family
ID=7666749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01270182A Expired - Lifetime EP1341946B1 (de) | 2000-12-12 | 2001-11-17 | Verschleisschutzschicht für kolbenringe enthaltend wolframkarbid und chromkarbid |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US7001670B2 (de) |
| EP (1) | EP1341946B1 (de) |
| JP (1) | JP4394349B2 (de) |
| AT (1) | ATE275212T1 (de) |
| BR (1) | BR0116079B1 (de) |
| DE (2) | DE10061750B4 (de) |
| WO (1) | WO2002048422A1 (de) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK1564309T3 (en) * | 2002-10-15 | 2015-04-07 | Riken Kk | Piston ring and thermal spray coating for use therein, and method of making them |
| DE102004014871A1 (de) * | 2004-03-26 | 2005-10-13 | Federal-Mogul Burscheid Gmbh | Kolbenring |
| DE102005020999A1 (de) * | 2005-05-03 | 2006-11-09 | Alfred Flamang | Verfahren zur Beschichtung von verschleißbeaufschlagten Bauteilen und beschichtetes Bauteil |
| DE102006049756A1 (de) * | 2006-10-21 | 2008-04-24 | Federal-Mogul Burscheid Gmbh | Verschleißschutzschicht für Kolbenringe |
| JP5113190B2 (ja) * | 2007-01-09 | 2013-01-09 | フェデラル−モーグル ブルシャイト ゲゼルシャフト ミット ベシュレンクテル ハフツング | 多層被覆を有するピストンリングおよびその製法 |
| US20090191416A1 (en) * | 2008-01-25 | 2009-07-30 | Kermetico Inc. | Method for deposition of cemented carbide coating and related articles |
| DE102008014333B4 (de) | 2008-03-14 | 2012-05-03 | Federal-Mogul Burscheid Gmbh | Verschleißfestes Bauteil |
| EP2145845B1 (de) * | 2008-07-14 | 2012-02-08 | Sulzer Metco Coatings GmbH | Tauchbadrolle und Verfahren zum Herstellen einer Tauchbadrolle |
| DE102009016650B3 (de) * | 2009-04-07 | 2010-07-29 | Federal-Mogul Burscheid Gmbh | Gleitelement mit einstellbaren Eigenschaften |
| US8906130B2 (en) | 2010-04-19 | 2014-12-09 | Praxair S.T. Technology, Inc. | Coatings and powders, methods of making same, and uses thereof |
| DE102010038289A1 (de) * | 2010-07-22 | 2012-01-26 | Federal-Mogul Burscheid Gmbh | Kolbenring mit thermischen gespritzter Beschichtung und Herstellungsverfahren davon |
| JP5948216B2 (ja) * | 2011-10-25 | 2016-07-06 | 株式会社Ihi | ピストンリングの製造方法 |
| BR102012016283A2 (pt) * | 2012-06-29 | 2014-08-12 | Mahle Metal Leve Sa | Elemento deslizante e motor de combustão interna |
| US9890858B2 (en) | 2012-06-29 | 2018-02-13 | Mahle Metal Leve S/A | Sliding element and internal combustion engine |
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| GB867455A (en) * | 1958-04-24 | 1961-05-10 | Metco Inc | Improvements relating to the production of carbide-containing sprayweld coatings |
| US3606359A (en) | 1969-08-08 | 1971-09-20 | Ramsey Corp | Tungsten carbide coated piston rings |
| US3837817A (en) | 1972-10-18 | 1974-09-24 | Nippon Piston Ring Co Ltd | Sliding member having a spray-coated layer |
| US3814447A (en) * | 1972-11-02 | 1974-06-04 | Ramsey Corp | Sealing element for use in internal combustion engines |
| GB1441961A (en) * | 1973-03-21 | 1976-07-07 | Wellworthy Ltd | Piston rings |
| IT1172891B (it) * | 1978-07-04 | 1987-06-18 | Fiat Spa | Procedimento per rivestire con materiale antiusura una superficie metallica |
| US4925626A (en) * | 1989-04-13 | 1990-05-15 | Vidhu Anand | Method for producing a Wc-Co-Cr alloy suitable for use as a hard non-corrosive coating |
| US5141571A (en) * | 1991-05-07 | 1992-08-25 | Wall Colmonoy Corporation | Hard surfacing alloy with precipitated bi-metallic tungsten chromium metal carbides and process |
| JPH06117537A (ja) * | 1992-10-01 | 1994-04-26 | Hitachi Zosen Corp | ピストンリング |
| US5395221A (en) * | 1993-03-18 | 1995-03-07 | Praxair S.T. Technology, Inc. | Carbide or boride coated rotor for a positive displacement motor or pump |
| US5419976A (en) * | 1993-12-08 | 1995-05-30 | Dulin; Bruce E. | Thermal spray powder of tungsten carbide and chromium carbide |
| JPH08210504A (ja) * | 1995-01-31 | 1996-08-20 | Nippon Piston Ring Co Ltd | ピストンリング |
| US5938403A (en) * | 1996-03-13 | 1999-08-17 | Hitachi, Ltd. | Runner, water wheel and method of manufacturing the same |
| US5713129A (en) * | 1996-05-16 | 1998-02-03 | Cummins Engine Company, Inc. | Method of manufacturing coated piston ring |
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| US6655181B2 (en) * | 2001-10-15 | 2003-12-02 | General Motors Corporation | Coating for superplastic and quick plastic forming tool and process of using |
-
2000
- 2000-12-12 DE DE10061750A patent/DE10061750B4/de not_active Expired - Fee Related
-
2001
- 2001-11-17 AT AT01270182T patent/ATE275212T1/de not_active IP Right Cessation
- 2001-11-17 BR BRPI0116079-6A patent/BR0116079B1/pt not_active IP Right Cessation
- 2001-11-17 JP JP2002550133A patent/JP4394349B2/ja not_active Expired - Fee Related
- 2001-11-17 US US10/450,220 patent/US7001670B2/en not_active Expired - Lifetime
- 2001-11-17 WO PCT/DE2001/004336 patent/WO2002048422A1/de not_active Ceased
- 2001-11-17 DE DE50103494T patent/DE50103494D1/de not_active Expired - Lifetime
- 2001-11-17 EP EP01270182A patent/EP1341946B1/de not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP4394349B2 (ja) | 2010-01-06 |
| US20040069141A1 (en) | 2004-04-15 |
| WO2002048422A1 (de) | 2002-06-20 |
| JP2004514795A (ja) | 2004-05-20 |
| EP1341946A1 (de) | 2003-09-10 |
| DE10061750B4 (de) | 2004-10-21 |
| DE10061750A1 (de) | 2002-06-20 |
| DE50103494D1 (de) | 2004-10-07 |
| BR0116079B1 (pt) | 2011-04-05 |
| US7001670B2 (en) | 2006-02-21 |
| ATE275212T1 (de) | 2004-09-15 |
| BR0116079A (pt) | 2003-12-16 |
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