EP0592310B1 - Revêtement pour parties frottantes par rotation d'une pièce en acier martensitique - Google Patents

Revêtement pour parties frottantes par rotation d'une pièce en acier martensitique Download PDF

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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
Application number
EP93402458A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0592310A1 (fr
Inventor
André Coulon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alstom SA
Original Assignee
GEC Alsthom Electromecanique SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by GEC Alsthom Electromecanique SA filed Critical GEC Alsthom Electromecanique SA
Publication of EP0592310A1 publication Critical patent/EP0592310A1/fr
Application granted granted Critical
Publication of EP0592310B1 publication Critical patent/EP0592310B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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.

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  • 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)
EP93402458A 1992-10-09 1993-10-06 Revêtement pour parties frottantes par rotation d'une pièce en acier martensitique Expired - Lifetime EP0592310B1 (fr)

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 (fr) 1994-04-13
EP0592310B1 true EP0592310B1 (fr) 1995-09-06

Family

ID=9434333

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93402458A Expired - Lifetime EP0592310B1 (fr) 1992-10-09 1993-10-06 Revêtement pour parties frottantes par rotation d'une pièce en acier martensitique

Country Status (5)

Country Link
US (1) US5449562A (ja)
EP (1) EP0592310B1 (ja)
JP (1) JPH06212448A (ja)
DE (1) DE69300449T2 (ja)
FR (1) FR2696760B1 (ja)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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
DE3377584D1 (en) * 1982-09-16 1988-09-08 Rabewerk Clausing Heinrich Method of applying protective coatings to the surfaces of tools and devices
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

Also Published As

Publication number Publication date
FR2696760A1 (fr) 1994-04-15
DE69300449T2 (de) 1996-02-22
EP0592310A1 (fr) 1994-04-13
US5449562A (en) 1995-09-12
JPH06212448A (ja) 1994-08-02
FR2696760B1 (fr) 1994-11-04
DE69300449D1 (de) 1995-10-12

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