EP0592310B1 - Beschichtung für Bereiche eines durch Drehung reibenden Teils aus Martensit-Stahl - Google Patents
Beschichtung für Bereiche eines durch Drehung reibenden Teils aus Martensit-Stahl Download PDFInfo
- Publication number
- EP0592310B1 EP0592310B1 EP93402458A EP93402458A EP0592310B1 EP 0592310 B1 EP0592310 B1 EP 0592310B1 EP 93402458 A EP93402458 A EP 93402458A EP 93402458 A EP93402458 A EP 93402458A EP 0592310 B1 EP0592310 B1 EP 0592310B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coating
- rotation
- cr3c2
- grains
- martesitic
- 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
Links
Images
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
- 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
-
- 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
- Y10T428/12014—All metal or with adjacent metals having metal particles
- Y10T428/12028—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, etc.]
- Y10T428/12049—Nonmetal component
- Y10T428/12056—Entirely inorganic
Definitions
- the present invention relates to a surface coating on martensitic steel for parts rubbing by rotation.
- Martensitic steels and particularly those containing 9 to 18% chromium have a high sensitivity to seizure. Comparative tests have shown such a difference in the friction behavior of these steels compared to ferritic steels that surface treatment is necessary, particularly when the mechanical part concerned is in rotation and rests on bearings or rests on a stop. The slightest lubrication fault can indeed lead to an almost instantaneous deterioration of the supporting bristles.
- the coating according to the invention having a low coefficient of friction and good adhesion and easy to deposit is characterized in that it comprises a NiMo matrix in which grains of Cr3C2 are embedded. It is important that the matrix does not contain chromium as this weakens the matrix.
- the grain of Cr3C2 are used to give hardness to the NiMo ductile matrix.
- composition by weight of the coating is as follows: Cr3C2 15 to 25% Mo 15 to 25% Or 55 to 65%
- the particle size of the MoNi matrix is 20 to 90 ⁇ m.
- the Cr3C3 comprises 2% by weight of submicron grains. These grains are found mainly in the vicinity of the surface and play a protective role ensuring a form of dry lubrication.
- Figure 1 shows the diagram of a device for depositing the coating according to the invention.
- Figure 2 shows the coating according to the invention.
- the torch 1 represented in FIG. 1 comprising a combustion chamber 2 supplied with a gaseous mixture comprising propane, oxygen with hydrogen and nitrogen and a central tube 3 supplied with a mixture of powders.
- the gas mixture passes from chamber 2 into a conduit 4 surrounding the tube 3.
- the end of the conduit 4 and the end of the tube 3 open to the outside where a flame 5 occurs.
- the powder crosses the flame and is projected at high speed by the carrier gas.
- the part to be coated (not shown) is placed at a short distance (200-400mm) from the torch and it moves in front of the part by an automatic advance system.
- the preparation of the surfaces to be coated is known to those skilled in the art: degreasing followed by buckling, sandblasting in order to promote the mechanical attachment of the coating.
- the thermal projection of the powder is carried out in a dynamic mode: rotor in rotation, torch moving horizontally for the bristles of the rotor, or vertically for the faces of the stop.
- the optimum coating thickness is between 30 and 60 ⁇ m.
- Powder is a specific alloy, particularly suitable for an application for turbine rotors.
- the proportions of the powder mixture are as follows (in% of the weight). Cr3C2 20% ⁇ 5% Or 60% ⁇ 5% Mo 20% ⁇ 5%
- the particle size of the powder must be chosen so that at least 90% by weight of the chromium carbide used is obtained from a submicron and spherical Cr3C2 then agglomerated and sintered to a size of 10 to 30 ⁇ m.
- the particle size of the NiMo mixture will be from 20 ⁇ m to 90 ⁇ m.
- the coating 6 of the part 7 (see FIG. 2) comprises large sintered grains 8 of Cr3C2 which ensure the hardness of the coating.
- the NiMo matrix 9 made up of grains from 20 ⁇ m to 90 ⁇ m is ductile so that if there is a lubrication incident, the coating will reduce friction.
- the coating comprises submicron grains 10 of Cr3C2, preferably 2% by weight of Cr3C2.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Sliding-Contact Bearings (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Claims (4)
- Oberflächenbeschichtung auf Martensitstahl für drehend reibende Bereiche, dadurch gekennzeichnet, daß sie eine Matrix (9) aus NiMo besitzt, in die Körner von Cr₃C₂ eingebettet sind, von denen 90 Gew.% aus Körnern einer Größe von 10 bis 30 µm bestehen.
- Beschichtung nach Anspruch 1, dadurch gekennzeichnet, daß sie die folgende Zusammensetzung in Gew.% aufweist:
Cr₃C₂ 15 bis 25% Mo 15 bis 25% Ni 55 bis 65%. - Beschichtung nach Anspruch 2, dadurch gekennzeichnet, daß die Korngrößen der Matrix NiMo (9) zwischen 20 und 90 µm liegen.
- Beschichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß ungefähr 2 Gew.% des Cr₃C₂-Materials aus Körnern (10) einer Größe unter 1 µm gebildet wird, die überwiegend in der Nähe der Oberfläche der Beschichtung (6) liegen.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9212021 | 1992-10-09 | ||
FR9212021A FR2696760B1 (fr) | 1992-10-09 | 1992-10-09 | Revêtement pour parties frottantes par rotation d'une pièce en acier matensitique. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0592310A1 EP0592310A1 (de) | 1994-04-13 |
EP0592310B1 true EP0592310B1 (de) | 1995-09-06 |
Family
ID=9434333
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93402458A Expired - Lifetime EP0592310B1 (de) | 1992-10-09 | 1993-10-06 | Beschichtung für Bereiche eines durch Drehung reibenden Teils aus Martensit-Stahl |
Country Status (5)
Country | Link |
---|---|
US (1) | US5449562A (de) |
EP (1) | EP0592310B1 (de) |
JP (1) | JPH06212448A (de) |
DE (1) | DE69300449T2 (de) |
FR (1) | FR2696760B1 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TW383233B (en) * | 1995-01-31 | 2000-03-01 | Rieter Ag Maschf | Thread guiding elements |
JPH0931628A (ja) * | 1995-07-25 | 1997-02-04 | Riken Corp | 摺動部材およびその製造方法 |
US7479630B2 (en) * | 2004-03-25 | 2009-01-20 | Bandura Dmitry R | Method and apparatus for flow cytometry linked with elemental analysis |
US20050241896A1 (en) * | 2004-04-28 | 2005-11-03 | Gerald Martino | Brake rotors with heat-resistant ceramic coatings |
GB0821459D0 (en) | 2008-11-24 | 2008-12-31 | Icera Inc | Active power management |
US8906130B2 (en) | 2010-04-19 | 2014-12-09 | Praxair S.T. Technology, Inc. | Coatings and powders, methods of making same, and uses thereof |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3617358A (en) * | 1967-09-29 | 1971-11-02 | Metco Inc | Flame spray powder and process |
US3941903A (en) * | 1972-11-17 | 1976-03-02 | Union Carbide Corporation | Wear-resistant bearing material and a process for making it |
ES445000A1 (es) * | 1975-02-10 | 1977-07-16 | Union Carbide Corp | Perfeccionamientos introducidos en una estructura recubier- ta. |
US4173457A (en) * | 1978-03-23 | 1979-11-06 | Alloys, Incorporated | Hardfacing composition of nickel-bonded sintered chromium carbide particles and tools hardfaced thereof |
US4275124A (en) * | 1978-10-10 | 1981-06-23 | United Technologies Corporation | Carbon bearing MCrAlY coating |
US4290510A (en) * | 1978-12-14 | 1981-09-22 | Chrysler Corporation | Wear resistant coated article |
US4334927A (en) * | 1980-12-08 | 1982-06-15 | Hyde Glenn F | Piston ring coatings |
EP0108877B1 (de) * | 1982-09-16 | 1988-08-03 | Rabewerk Heinrich Clausing | Verfahren zum Aufbringen verschleissfester Schichten auf Arbeitsflächen von Werkzeugen und Vorrichtungen |
JPS6033364A (ja) * | 1983-08-01 | 1985-02-20 | Koei Seikou Kk | 熱処理炉用ハ−スロ−ル及びその製造方法 |
FR2563540B1 (fr) * | 1984-04-26 | 1989-05-05 | Alsthom Atlantique | Dispositif pour effectuer un depot metallique sur les parties frottantes d'un rotor de turbine |
GB8414219D0 (en) * | 1984-06-04 | 1984-07-11 | Sherritt Gordon Mines Ltd | Production of nickel-chromium/carbide coating on substrates |
DE3515107C1 (de) * | 1985-04-26 | 1986-07-31 | Goetze Ag, 5093 Burscheid | Spritzpulver fuer die Herstellung verschleissfester und ausbruchsicherer Beschichtungen |
US4731253A (en) * | 1987-05-04 | 1988-03-15 | Wall Colmonoy Corporation | Wear resistant coating and process |
FR2638781B1 (fr) * | 1988-11-09 | 1990-12-21 | Snecma | Depot electrophoretique anti-usure du type metalloceramique consolide par nickelage electrolytique |
US5137422A (en) * | 1990-10-18 | 1992-08-11 | Union Carbide Coatings Service Technology Corporation | Process for producing chromium carbide-nickel base age hardenable alloy coatings and coated articles so produced |
-
1992
- 1992-10-09 FR FR9212021A patent/FR2696760B1/fr not_active Expired - Fee Related
-
1993
- 1993-10-06 DE DE69300449T patent/DE69300449T2/de not_active Expired - Fee Related
- 1993-10-06 EP EP93402458A patent/EP0592310B1/de not_active Expired - Lifetime
- 1993-10-08 US US08/131,950 patent/US5449562A/en not_active Expired - Fee Related
- 1993-10-08 JP JP5252979A patent/JPH06212448A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
FR2696760A1 (fr) | 1994-04-15 |
DE69300449D1 (de) | 1995-10-12 |
DE69300449T2 (de) | 1996-02-22 |
FR2696760B1 (fr) | 1994-11-04 |
EP0592310A1 (de) | 1994-04-13 |
US5449562A (en) | 1995-09-12 |
JPH06212448A (ja) | 1994-08-02 |
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