EP3022326B1 - Imprägnierung einer hvof-beschichtung mit einem schmiermittel - Google Patents

Imprägnierung einer hvof-beschichtung mit einem schmiermittel Download PDF

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Publication number
EP3022326B1
EP3022326B1 EP14744494.7A EP14744494A EP3022326B1 EP 3022326 B1 EP3022326 B1 EP 3022326B1 EP 14744494 A EP14744494 A EP 14744494A EP 3022326 B1 EP3022326 B1 EP 3022326B1
Authority
EP
European Patent Office
Prior art keywords
coating
pores
lubricant
lubricating agent
hvof
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.)
Active
Application number
EP14744494.7A
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English (en)
French (fr)
Other versions
EP3022326A1 (de
Inventor
Francis Monerie-Moulin
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.)
Safran Landing Systems SAS
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Safran Landing Systems SAS
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Publication date
Application filed by Safran Landing Systems SAS filed Critical Safran Landing Systems SAS
Publication of EP3022326A1 publication Critical patent/EP3022326A1/de
Application granted granted Critical
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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
    • 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
    • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • 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
    • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • C23C4/129—Flame spraying
    • 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
    • C23C4/18—After-treatment

Definitions

  • the invention relates to a method of protecting a metal substrate coated by HVOF process.
  • HVOF for high velocity oxy-fuel
  • HVOF is meant a projection method using a combustion of a fuel with the aid of an oxidant to generate gases, these gases making it possible to eject the powder mixture on a substrate at speeds and temperatures sufficiently high that the sprayed powder mixture clings to this substrate and forms a coating layer thereon.
  • the coating layers thus deposited are known to be very dense, and it is usual to improve the frictional qualities of a mechanical part thus coated by greasing.
  • the grease is applied for example during the insertion of the piece in the mechanism in which it must take place and in which it is likely to come into contact with another piece during a relative movement.
  • the WC-Co-Cr layer was previously machined (for example by grinding) to give the part thus coated the desired dimension.
  • JP-A-2002 194523 offers a WC-Co-Cr HVOF layer impregnated with a polymer to improve lubrication.
  • the object of the invention is to protect a HVOF coated metal substrate with a coating, preferably a WC-Co-Cr coating, to avoid the risk of naked friction.
  • a method of protecting a HVOF-coated metal substrate with a preferentially WC-Co-Cr type coating comprising the application on the coating of a lubricating agent which comprises solid lubricant particles incorporated into a fluid having a sufficiently low surface tension to penetrate pores of the coating and entrain the solid lubricant particles therein.
  • HVOF-deposited coatings and in particular type WC-Co-Cr-type coatings although very dense, have a large interconnected porosity, which can exceed 15%, with a size of very small pores (typically of the order of 350 nanometers).
  • the existence of such pores has hitherto gone unnoticed, since such small pores are generally not detected by porosity measurement methods by image analysis at x200 to x400 magnifications commonly used in industry.
  • such pores can be evidenced by mercury porosimetry, which also makes it possible to demonstrate significant pore connectivity.
  • the application of the lubricating agent containing the lubricant particles is carried out in an environment under vacuum, vacuum or overpressure with respect to atmospheric pressure.
  • a low pressure such as an air vacuum and a high pressure of the environment.
  • a mechanical sealing operation at least partial, of the pores of the coating is carried out by machining and / or or rectifying and / or polishing a surface portion of this coating.
  • the mechanical operation of machining and / or grinding and / or polishing has the effect of plastically deforming at least some of the pores located near the surface of the coating (that is to say in a superficial zone of the coating layer). This operation allows to close, at least partially, some of the pores on the surface of the coating which limits the passage of release of the lubricant introduced into the network of interconnected pores.
  • the lubricant is made accessible from the outside of the coating only at the open pores opening outwardly of the coating.
  • the closed or partially closed pores open and release a part of the lubricant they contain.
  • the coating thus has an integrated lubricating function which releases its lubricant at the same time as it wears out.
  • HVOF process sliding rods of undercarriages made of high-strength steel (300M steel according to the AMS 6257 standard, or Aermet 100 steel according to the AMS 6532 standard, heat-treated to 1900 -2000 megapascals) with a WC-10Co-4Cr type coating with an average agglomerates size of 15-45 micrometers, obtained from standard elementary tungsten carbide (from 1 to 4 micrometers).
  • the lubricating agent chosen is prepared from a water-repellent fluid of WADIS24 type from SOCOMORE FINISHING SOLUTIONS.
  • the fluid is enriched by incorporating solid lubricant particles, for example graphite, molybdenum disulfide, tungsten disulfide.
  • solid lubricant particles for example graphite, molybdenum disulfide, tungsten disulfide.
  • the lubricating agent is deposited by brush or by spray on the coating.
  • the fluid forms a monomolecular film impervious to the surface of the coating and creeps into the pores of the coating, dragging with it solid lubricant particles.
  • the recommended fluid is compatible with mineral oils, so that the workpiece can be quickly brought into contact with another lubricant. However, should this lubricant fail during the life of the part, the self-lubricating mechanism would take over to protect the part from a risk of naked rubbing.
  • the fluid has the effect of driving water from the surface of the rod and thus contributes to the protection of the rod against corrosion.
  • Such treatment can be performed while the coating has been ground. However, such treatment can be done before rectification, because it increases the penetration of the lubricant in the open pores preferentially interconnected with each other (the rectification has the effect of closing pores located on the surface of the coating). Therefore the lubricant is released as and when the wear of the coating and in particular as the wear of closed or partially closed pores that contain lubricant.
  • the lubricating agent described here contains a water-repellent fluid WADIS24
  • any other fluid having a surface tension sufficiently low to promote its penetration into the pores of the coating for example perchlorethylene.
  • WADIS24 water-repellent fluid
  • any other fluid having a surface tension sufficiently low to promote its penetration into the pores of the coating for example perchlorethylene.
  • micrometric molybdenum disulfide, graphite, mixed with an inorganic binder, for example sodium silicate, wetted with perchlorethylene will be used.

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)
  • Lubricants (AREA)

Claims (4)

  1. Verfahren zum Schützen eines Metalisubstrats, das durch ein HVOF-Verfahren mit einer Beschichtung beschichtet ist, wobei das Verfahren das Aufbringen eines Schmiermittels auf die Beschichtung umfasst, das Festschmierstoffteilchen umfasst, die in einem Fluid aufgenommen sind, welches eine Oberflächenspannung hat, die ausreichend niedrig ist, um in die Poren der Beschichtung einzudringen und die Festschmierstoffteilchen dorthin mitzunehmen.
  2. Verfahren nach Anspruch 1, bei dem die Beschichtung vom Typ WC-Co-Cr ist.
  3. Verfahren nach einem der Ansprüche 1 oder 2, bei dem die Festschmierstoffteilchen aus Graphit, Molybdendisulfid und Wolframdisulfid ausgewählt werden.
  4. Verfahren nach einem der Ansprüche 1 bis 3, bei dem nach Aufbringen des Schmiermittels ein mechanischer Vorgang des zumindest teilweisen Verschließens der Poren der Beschichtung durch maschinelle Bearbeitung und/oder Schleifen und/oder Polieren eines Oberflächenbereichs dieser Beschichtung durchgeführt wird.
EP14744494.7A 2013-07-17 2014-07-16 Imprägnierung einer hvof-beschichtung mit einem schmiermittel Active EP3022326B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1357040A FR3008715B1 (fr) 2013-07-17 2013-07-17 Impregnation d'un revetement hvof par un lubrifiant
PCT/EP2014/065247 WO2015007777A1 (fr) 2013-07-17 2014-07-16 Impregnation d'un revêtement hvof par un lubrifiant

Publications (2)

Publication Number Publication Date
EP3022326A1 EP3022326A1 (de) 2016-05-25
EP3022326B1 true EP3022326B1 (de) 2017-08-30

Family

ID=49546541

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14744494.7A Active EP3022326B1 (de) 2013-07-17 2014-07-16 Imprägnierung einer hvof-beschichtung mit einem schmiermittel

Country Status (4)

Country Link
US (1) US20160369385A1 (de)
EP (1) EP3022326B1 (de)
FR (1) FR3008715B1 (de)
WO (1) WO2015007777A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160298049A1 (en) * 2015-04-10 2016-10-13 United Technologies Corporation Solid lubricant filled structural matrix

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3749559A (en) * 1969-10-20 1973-07-31 Ramsey Corp Piston rings with coating impregnated with antifriction agent
JPH01191771A (ja) * 1988-01-25 1989-08-01 Diesel Kiki Co Ltd 潤滑用被膜の形成方法
DE4418517C1 (de) * 1994-05-27 1995-07-20 Difk Deutsches Inst Fuer Feuer Verfahren zum Herstellen einer Verschließschicht und ihre Verwendung
EP0725158B1 (de) * 1995-02-02 1999-06-16 Sulzer Innotec Ag Gleitverschleissfeste Verbundbeschichtung
JPH11335806A (ja) * 1998-05-28 1999-12-07 Mitsubishi Heavy Ind Ltd 高温用摺動材の製造方法
JP2002194523A (ja) * 2000-12-25 2002-07-10 Toshiba Corp 駆動部品とその製造方法並びに駆動部品を具備した電力用開閉装置
JP3952252B2 (ja) * 2001-01-25 2007-08-01 株式会社フジミインコーポレーテッド 溶射用粉末およびそれを用いた高速フレーム溶射方法
JP2003113462A (ja) * 2001-10-09 2003-04-18 Kawasaki Steel Corp 溶射皮膜の形成方法
US8800650B2 (en) * 2006-03-10 2014-08-12 Dynamic Tubular Systems, Inc. Expandable tubulars for use in geologic structures
US8568827B2 (en) * 2006-11-30 2013-10-29 Caterpillar Inc. Textured coating on a component surface
US20080145649A1 (en) * 2006-12-14 2008-06-19 General Electric Protective coatings which provide wear resistance and low friction characteristics, and related articles and methods
US20130171367A1 (en) * 2011-12-30 2013-07-04 Grzegorz Jan Kusinski Coating compositions, applications thereof, and methods of forming

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
WO2015007777A1 (fr) 2015-01-22
FR3008715B1 (fr) 2015-08-14
US20160369385A1 (en) 2016-12-22
FR3008715A1 (fr) 2015-01-23
EP3022326A1 (de) 2016-05-25

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