WO2016139007A1 - Procédé de fabrication d'une surface de glissement pour un joint d'étanchéité - Google Patents

Procédé de fabrication d'une surface de glissement pour un joint d'étanchéité Download PDF

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Publication number
WO2016139007A1
WO2016139007A1 PCT/EP2016/050791 EP2016050791W WO2016139007A1 WO 2016139007 A1 WO2016139007 A1 WO 2016139007A1 EP 2016050791 W EP2016050791 W EP 2016050791W WO 2016139007 A1 WO2016139007 A1 WO 2016139007A1
Authority
WO
WIPO (PCT)
Prior art keywords
coating
metal matrix
hard metal
piston rod
base body
Prior art date
Application number
PCT/EP2016/050791
Other languages
German (de)
English (en)
Inventor
Michael Heyer
Original Assignee
Thyssenkrupp Bilstein Gmbh
Thyssenkrupp Ag
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 Thyssenkrupp Bilstein Gmbh, Thyssenkrupp Ag filed Critical Thyssenkrupp Bilstein Gmbh
Publication of WO2016139007A1 publication Critical patent/WO2016139007A1/fr

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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
    • C23C4/12—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
    • C23C4/04—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
    • C23C4/18—After-treatment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/3207—Constructional features
    • F16F9/3221—Constructional features of piston rods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/36—Special sealings, including sealings or guides for piston-rods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J7/00—Piston-rods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F2226/00—Manufacturing; Treatments
    • F16F2226/02—Surface treatments

Definitions

  • the present invention relates to a method of manufacturing a tread for a gasket. STATE OF THE ART
  • seals On the basis of seals, in particular sealing rings, a gap between two relatively moving components can be sealed.
  • the one component is firmly connected to the seal; the other component moves relative to the seal during operation.
  • the tread touch the seal and the relative moving other component.
  • the piston rods of vibration dampers for motor vehicles are produced in a galvanic process, whereby the outer surface of the piston rod is chromed (chrome plating with hexavalent chromium, also known as chromium (VI) or hard chromium). After chrome plating, the chrome surface is subjected to a finishing process to form a cross-cut, which is an important prerequisite for the accumulation of lubricant and is therefore essential for good sliding properties.
  • the galvanic process for hard chrome plating is critically evaluated for environmental reasons, so that an alternative to this method is sought.
  • a vibration damper with a corresponding piston rod is known from DE 10 2013 008 890 AI.
  • a piston is attached on the piston rod.
  • the piston rod is passed axially through the wall of a damper tube.
  • a closure package is provided with a seal against which the piston rod moves axially at a high frequency.
  • the cylindrical surface of the piston rod forms the tread.
  • the invention has for its object to develop an alternative to the electrodeposited hard chrome layer.
  • This alternative should be environmentally friendly and cheap to implement and deliver comparable results in terms of wear and corrosion protection in terms of galvanic hard chrome plating.
  • a method for producing a running surface for a seal, in particular on a piston rod of a vibration damper for a motor vehicle chassis which comprises the following method steps:
  • the method is characterized in that the application is carried out by means of a high-speed spraying method, in particular a high-speed flame spraying method, and without heating the hard metal matrix to its melting point.
  • High-speed spraying also known as high-speed flame spraying, differs from flame spraying in the speed exhibited by the accelerated particles as they exit the injection mold.
  • the speed is in particular at least 600 m / s, preferably at least 700 m / s or preferably at least 800 m / s.
  • high-speed flame spraying HVOF or HVAF is suitable for this purpose.
  • the coating applied by the high-speed spraying has, surprisingly, a structure-related porosity which is similar to the structure of a sintered metal.
  • This porosity has a positive effect on the tribological properties of the surface produced and has a comparable with respect to the lubricating properties of the above-mentioned cross-cut.
  • the separate generation of a cross-cut or another finishing method is therefore superfluous.
  • this porosity has positive effects on the elasticity of the coating, especially in bending stress. Spalling of the coating may occur less frequently than with conventional coatings.
  • the characteristic microstructure of the coating produced by the present method can be recognized by means of conventional analysis methods, in particular by means of the analysis by means of a scanning electron microscope (SEM) and / or by means of energy-dispersive X-ray spectroscopy (EDX).
  • SEM scanning electron microscope
  • EDX energy-dispersive X-ray spectroscopy
  • the position, shape and type of hard particles within the coating can be recognized. It can be the deformation of the particles are recognized, which are caused by the impact of the particles in the direction of the base body.
  • a microstructure produced by sintering although there are also particle deformations due to mechanical loading; but these are generated by pressurization in different directions and thus have a different pattern.
  • the metallic binder, the hard particles and / or the base body are not subjected to any thermal treatment after application.
  • the metallic binder, the hard particles and / or the base body are preferably not heated to their respective melting temperature in the further course of the production of the piston rod, or they always remain below the respective melting temperature.
  • the applied hard metal matrix is preferably subjected exclusively to a cutting process for producing the desired dimensions, in particular a custom grinding. The structure-related porosity is not changed.
  • the hard particles may comprise chromium carbide particles and / or tungsten carbide particles.
  • the metallic binder may comprise or consist of a NiCr alloy.
  • the main body may already have been surface-hardened before the process, in particular in the region of the tread. This can protect the coating from flaking and cracking. Because basically the coating is hard and brittle compared to suitable materials of the body. If a thin coating were then applied to a non-surface-hardened and thus comparatively soft base body, this would have a similar effect as when a glass pane is placed on a bed mattress: a locally compliant support would already make the hard layer (coating or glass pane) break at a very small local load. On the other hand, a hard surface layer of the base body provides a uniformly distributed support for the brittle coating. This previous surface hardening is at very thin layer thicknesses of the coatings of max. 50 m preferred.
  • the coating on the tread preferably has a thickness of at least 15 m.
  • the hardness of the coating on the running surface is preferably at least 800 HV, preferably at least 950 HV.
  • the present spraying method is suitable for producing different layer thicknesses on different regions of the base body.
  • a coating with the hard metal matrix and with a layer thickness which is smaller than the layer thickness of the coating in the region of the tread can be produced.
  • the layer thickness is proportional to the duration that the area is exposed to the injection process at constant material conversion.
  • this method is suitable for producing a running surface on a piston rod of a vibration damper, in particular for a motor vehicle chassis.
  • Fig. 1 a basic body in the form of a steel rod, the one
  • Fig. 2 is an enlarged view of a section of a piston rod
  • a surface hardened steel rod 1 shown in FIG. 1 forms the basic body for the method according to the invention.
  • a hard metal matrix 5 is applied to the cylindrical outer surface 2 of the steel rod 1.
  • the steel rod 1 is set in rotation about its axis A; the flame spray nozzle 3 is guided up and down parallel to the axis of rotation A during the coating process.
  • hard metal matrix for example, the chromium carbide-based spray powder with the designation Cr 3 C 2 / NiCr 75/25 from GTV GmbH can be used.
  • FIG. 2 shows a detail of a piston rod 4 produced from the steel rod 1 according to FIG. Evident is the coating 5, which is applied to the lateral surface 2 of the steel rod 1. An area of this coating 5 ', after a symposiumschleifen the running surface 6 of the piston rod 4 is on this tread 6 is now a closure package 7 with integrated seal, which closes the vibration damper (indicated by a section of the associated damper tube 8).
  • the coating 5 ' is made thicker than the coating 5 "in areas which do not serve as a running surface (indicated by a double or simple layer row), because in the area of the bearing bushing 7 the coating constitutes 5 ', the tread 6 ready to be placed on the higher demands for wear protection, as on the remaining areas of the piston rod 4.
  • the required in the other areas corrosion protection can be provided by a thinner coating.
  • Such a differentiation of the layer thicknesses is not possible with the galvanic coating.
  • the inventive method is also characterized by an optimized use of materials and weight savings.
  • Cylinder chambers can be coated from inside or outside.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating By Spraying Or Casting (AREA)

Abstract

Procédé de fabrication d'une surface de glissement (6) pour un joint d'étanchéité (7), située en particulier sur une tige de piston (4) d'un amortisseur de vibrations pour un châssis de véhicule à moteur, qui comprend les étapes suivantes : préparation d'un corps de base (1), et application d'une matrice de métal dur (5) comprenant un liant métallique et des particules dures incorporées dans ledit liant sur le corps de base (1), ladite application étant mise en oeuvre au moyen d'un procédé de projection à haute vitesse, en particulier d'un procédé de projection par flamme supersonique, et sans chauffe de la matrice en métal dur (5) jusqu'à son point de fusion.
PCT/EP2016/050791 2015-03-02 2016-01-15 Procédé de fabrication d'une surface de glissement pour un joint d'étanchéité WO2016139007A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015102966.9 2015-03-02
DE102015102966.9A DE102015102966A1 (de) 2015-03-02 2015-03-02 Verfahren zum Herstellen einer Lauffläche für eine Dichtung

Publications (1)

Publication Number Publication Date
WO2016139007A1 true WO2016139007A1 (fr) 2016-09-09

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Application Number Title Priority Date Filing Date
PCT/EP2016/050791 WO2016139007A1 (fr) 2015-03-02 2016-01-15 Procédé de fabrication d'une surface de glissement pour un joint d'étanchéité

Country Status (2)

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DE (1) DE102015102966A1 (fr)
WO (1) WO2016139007A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109136813A (zh) * 2018-02-28 2019-01-04 德州章源喷涂技术有限公司 一种矿用液压支架立柱表面处理方法
CN111500964A (zh) * 2020-04-30 2020-08-07 三一石油智能装备有限公司 一种球墨铸铁柱塞的制备方法及柱塞

Citations (3)

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Publication number Priority date Publication date Assignee Title
DE69934739T2 (de) * 1998-06-08 2007-10-11 Delphi Technologies, Inc., Troy Sprühbeschichtungen für Aufhängungsdämpferstangen
WO2013007401A1 (fr) * 2011-07-12 2013-01-17 Federal-Mogul Burscheid Gmbh Couche de protection contre l'usure pour segments de piston
WO2013034544A1 (fr) * 2011-09-06 2013-03-14 H.C. Starck Gmbh Poudres cermet

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DE3925865C1 (fr) 1989-08-04 1991-01-10 Goetze Ag, 5093 Burscheid, De
EP1757710A1 (fr) * 2005-08-23 2007-02-28 Sulzer Metco Coatings GmbH Pièce avec un revêtement appliqué par projection thermique
US8087610B2 (en) * 2009-01-22 2012-01-03 Goodrich Corporation Aircraft shock strut having fixed upper bearing
DE102013008890A1 (de) 2013-05-27 2014-08-28 Thyssenkrupp Bilstein Gmbh Schwingungsdämpfer für ein Fahrzeug
DE102013009955B4 (de) * 2013-06-13 2020-06-04 Daimler Ag Bremsscheibe oder Bremstrommel mit verschleißbeständiger Reibschicht

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69934739T2 (de) * 1998-06-08 2007-10-11 Delphi Technologies, Inc., Troy Sprühbeschichtungen für Aufhängungsdämpferstangen
WO2013007401A1 (fr) * 2011-07-12 2013-01-17 Federal-Mogul Burscheid Gmbh Couche de protection contre l'usure pour segments de piston
WO2013034544A1 (fr) * 2011-09-06 2013-03-14 H.C. Starck Gmbh Poudres cermet

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
YANG ZH: "Alternatives to hard chromium plating on piston rods", DEGREE PROJECT OF 30 CREDIT POINTS MASTER OF SCIENCE IN ENGINEERING, MECHANICAL ENGINEERING, 2011, Universitet Karlstad, Karlstad [SE], pages 1 - 55, XP055256864, Retrieved from the Internet <URL:http://kau.diva-portal.org/smash/get/diva2:452803/FULLTEXT01.pdf> [retrieved on 20160309] *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109136813A (zh) * 2018-02-28 2019-01-04 德州章源喷涂技术有限公司 一种矿用液压支架立柱表面处理方法
CN111500964A (zh) * 2020-04-30 2020-08-07 三一石油智能装备有限公司 一种球墨铸铁柱塞的制备方法及柱塞

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