EP1988295B1 - Eléments de machine revêtus en surface - Google Patents

Eléments de machine revêtus en surface Download PDF

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Publication number
EP1988295B1
EP1988295B1 EP08007797.7A EP08007797A EP1988295B1 EP 1988295 B1 EP1988295 B1 EP 1988295B1 EP 08007797 A EP08007797 A EP 08007797A EP 1988295 B1 EP1988295 B1 EP 1988295B1
Authority
EP
European Patent Office
Prior art keywords
material layer
hard material
piston rod
enamel
layer
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 - Fee Related
Application number
EP08007797.7A
Other languages
German (de)
English (en)
Other versions
EP1988295A2 (fr
EP1988295A3 (fr
Inventor
Josef Bueter
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.)
Buemach Engineering International BV
Original Assignee
Buemach Engineering International BV
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 Buemach Engineering International BV filed Critical Buemach Engineering International BV
Publication of EP1988295A2 publication Critical patent/EP1988295A2/fr
Publication of EP1988295A3 publication Critical patent/EP1988295A3/fr
Application granted granted Critical
Publication of EP1988295B1 publication Critical patent/EP1988295B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status 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
    • C23D—ENAMELLING OF, OR APPLYING A VITREOUS LAYER TO, METALS
    • C23D5/00—Coating with enamels or vitreous layers
    • 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
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/04—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings of inorganic non-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
    • 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
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
    • C23C8/20—Carburising
    • 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
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
    • C23C8/20—Carburising
    • C23C8/22—Carburising of ferrous surfaces
    • 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
    • C23D—ENAMELLING OF, OR APPLYING A VITREOUS LAYER TO, METALS
    • C23D5/00—Coating with enamels or vitreous layers
    • C23D5/06—Coating with enamels or vitreous layers producing designs or letters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1457—Piston rods

Definitions

  • the invention relates to a surface-coated metallic piston rod of a hydraulic working cylinder, which is equipped with a low-wear and corrosion-resistant surface coating.
  • Low-wear and corrosion-resistant surfaces are required, inter alia, for machine elements and components in which a first is moved in a sliding manner relative to a second, in a linear or rotary manner.
  • Such components are coated with metallic layers of hard chrome, nickel or bronze.
  • coatings with ceramic materials, sintered materials, titanium nitride, titanium carbide or plastics are also known.
  • the cylinder inner surface and piston rod surface are coated on all sides with plastic in Vortex sintering process or powder spraying.
  • the plastic used is polytetrafluoroethylene as a three-dimensionally crosslinkable, temperature-resistant thermoplastic in powder form with the addition of further components.
  • the hard material layer is harder than the material of the slider and has a roughness of less than 10 microns.
  • oxide or non-oxidic ceramic layers which are applied primarily by plasma spraying, can be adapted in their properties by doping specific applications, but always require a complex final machining by grinding.
  • Ceramic layers on sliders or piston rods usually have sufficient hardness, but are due to the inevitable existing porosity against corrosive attacks relatively sensitive, with aggressive substances can penetrate to the metal surface and can cause the layer to burst.
  • Layers of hard chrome provide good wear protection, but are also not particularly resistant because of the micro-cracking against chemical influences.
  • titanium nitride, titanium carbide or the like which are applied by PVD (Physical Vapor Deposition) or CVD (Chemical Vapor Deposition) method are very hard, but because of the small layer thickness mechanically sensitive. The roughness of the layers thus applied corresponds to that of the substrate. Accordingly, the surfaces are mechanically machined as piston rods or other sliding bodies to the required quality and prepare technologically.
  • PVD Physical Vapor Deposition
  • CVD Chemical Vapor Deposition
  • the object of the invention is a metallic piston rod of a hydraulic working cylinder with a To equip surface of a hard material layer, which is resistant to corrosion, abrasion resistant, has good sliding properties and is inexpensive to produce.
  • the invention is based on the fact that a hard material layer as a surface for a metallic piston rod of a hydraulic working cylinder in the form of a glaze consists of a material of amorphous structure.
  • a hardening glaze an enamel is used as an amorphous hardening glaze.
  • the glassy surface of the enamel has an extremely low wear and a high impact resistance when using the sliding elements.
  • the substrate Due to the crack- and pore-free surface of the enamel, the substrate is protected against corrosive influences in the form of the metal of the piston rod of the hydraulic working cylinder.
  • a solid, almost insoluble compound of the glassy, amorphous solidifying mass arises.
  • the property values of the hard material layer of enamel as a sliding layer can be influenced in particular in terms of their hardness, toughness and color in a known manner by means of doping, in the form of admixtures to the enamel frit.
  • the thickness of the enamel applied in particular in one layer as a hard material layer to the metallic piston rod of the hydraulic working cylinder is preferably in a range of 80-500 micrometers.
  • Another advantage is that when applying a hard material layer of hard chrome to a metallic piston rod of a working cylinder by electroplating resulting environmental pollution in a hard material layer of enamel are not present.
  • the hard material layer does not require post-processing after melting or firing in the enamelling process.
  • Worn or damaged hard coatings can be removed, for example, by means of blasting.
  • the sliding bodies can be regenerated in this way with the aid of a re-applied layer of enamel.
  • the color of the hard material layer can be selected without adversely affecting the required quality of the surface of the slider for the respective purpose, also for design purposes.
  • the hard material layer has different coloring.
  • the coloring is conveniently done with signal colors in contrast to a base color, these sections, such as point or annular, are formed as signal marks. In this way, it is possible to visually detect the extended length of the piston rod of a working cylinder or the position of another sliding member on the basis of the signal marks by means of an optical sensor.
  • the invention will be described as an embodiment of hand Fig. 1 explained in more detail as an outline of a section through a tubular piston rod of a working cylinder.
  • Fig. 1 is applied to an outer shell of a tubular metallic piston rod 1 of a working cylinder, a hard material layer 2 made of enamel with a glassy surface 3. Between the outer shell of the piston rod 1 and the hard material layer 2 is formed during the enameling process, the melting or incineration, by chemical reactions, an adhesive layer 4, which causes a solid, almost insoluble compound of glassy, amorphous solidifying mass with the outer shell of the piston rod 1 ,
  • the hard material layer 2 has a hardness of at least 700 HV (Vickers hardness), which gives the required wear resistance as well as shock and impact resistance.
  • the layer thickness of the hard material layer 2 is preferably in the range of 100 micrometers.
  • layer thicknesses of 80 to 500 micrometers are possible and can be implemented depending on the particular application.
  • a piston rod coated with the hard material layer 2 made of enamel can be regenerated by removing the hard material layer 2, preferably by means of sandblasting, and then applying it again.
  • the hard material layer 2 made of enamel with the glassy surface is known to be resistant to water and aggressive chemical substances, whereby the high corrosion resistance significantly extends the life of working cylinders with piston rods 1, the hard material layer 2 made of enamel, in an environment with aggressive influences.
  • Used reference signs 1 piston rod 2 Hard coating 3 glassy surface 4 adhesive layer

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Claims (2)

  1. Tige de piston métallique revêtue en surface d'un cylindre moteur comportant une surface réalisée en une couche en un matériau à résistance mécanique élevée réalisée sous la forme d'une glaçure en un matériau ayant une structure amorphe présentant une surface vitreuse,
    caractérisée en ce que
    la couche de matériau à résistance mécanique élevée (2) est un émail.
  2. Tige de piston métallique revêtue en surface d'un cylindre moteur conforme à la revendication 1,
    caractérisée en ce que
    la couche de matériau à résistance mécanique élevée (2) comporte des aires de couleurs contrastées par rapport à la couleur de base qui servent de repères de signaux pour permettre le marquage visuel ou l'exploitation au moyen de capteurs optiques.
EP08007797.7A 2007-05-04 2008-04-23 Eléments de machine revêtus en surface Expired - Fee Related EP1988295B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200720006370 DE202007006370U1 (de) 2007-05-04 2007-05-04 Oberflächenbeschichtete Maschinenelemente

Publications (3)

Publication Number Publication Date
EP1988295A2 EP1988295A2 (fr) 2008-11-05
EP1988295A3 EP1988295A3 (fr) 2011-05-25
EP1988295B1 true EP1988295B1 (fr) 2013-06-26

Family

ID=38266576

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08007797.7A Expired - Fee Related EP1988295B1 (fr) 2007-05-04 2008-04-23 Eléments de machine revêtus en surface

Country Status (2)

Country Link
EP (1) EP1988295B1 (fr)
DE (1) DE202007006370U1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3158495A (en) * 1960-09-30 1964-11-24 Gen Electric Solid lubricant coatings and coating compositions
GB1369222A (en) * 1970-09-10 1974-10-02 Ferro Holland Coating apparatus for applying enamel onto an article
EP0204339A2 (fr) * 1985-06-07 1986-12-10 Matsushita Electric Industrial Co., Ltd. Article comportant un revêtement résistant à l'abrasion
EP0378479A1 (fr) * 1989-01-11 1990-07-18 Seb S.A. Semelle de fer émaillée

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2233512A1 (en) * 1973-06-14 1975-01-10 Repiquet Sa Vice with controlled displacement - has plastic marks on stem for photodetector
BR8107846A (pt) 1980-12-03 1982-09-08 Lucas Industries Ltd Componente metalico de aco
DE3501656A1 (de) * 1985-01-19 1986-07-24 Nikolaus 3160 Lehrte Reininger Emailliertes rohr fuer hochdruckwaermetauscher
DE3910725C1 (fr) 1989-04-03 1990-10-31 Hydraudyne Cylinders B., Boxtel, Nl
DE29913762U1 (de) 1999-08-06 2000-03-23 Ibs Ingenieurberatung Schlutz PTFE-Beschichtung zur Herstellung eines hydraulischen Zylinders
DE20106763U1 (de) 2001-04-19 2001-08-09 Schlutz Heinz Bergbauzylinder mit Beschichtung
DE20209420U1 (de) 2002-06-17 2002-11-21 Emil Kammerer Gmbh Trennschieber
CA2456395C (fr) * 2003-08-04 2012-07-24 Industries Mailhot Inc. Ensemble de nettoyage d'arbre
DE202007013155U1 (de) * 2007-09-18 2007-12-13 GET Göltz-Emailtechnik GmbH Hydraulikzylinder und Hydraulikkolben mit emaillierter Oberfläche

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3158495A (en) * 1960-09-30 1964-11-24 Gen Electric Solid lubricant coatings and coating compositions
GB1369222A (en) * 1970-09-10 1974-10-02 Ferro Holland Coating apparatus for applying enamel onto an article
EP0204339A2 (fr) * 1985-06-07 1986-12-10 Matsushita Electric Industrial Co., Ltd. Article comportant un revêtement résistant à l'abrasion
EP0378479A1 (fr) * 1989-01-11 1990-07-18 Seb S.A. Semelle de fer émaillée

Also Published As

Publication number Publication date
EP1988295A2 (fr) 2008-11-05
EP1988295A3 (fr) 2011-05-25
DE202007006370U1 (de) 2007-07-12

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