EP2274461A2 - Coating of a body made of steel or crp material and method for producing such a coating - Google Patents

Coating of a body made of steel or crp material and method for producing such a coating

Info

Publication number
EP2274461A2
EP2274461A2 EP09718799A EP09718799A EP2274461A2 EP 2274461 A2 EP2274461 A2 EP 2274461A2 EP 09718799 A EP09718799 A EP 09718799A EP 09718799 A EP09718799 A EP 09718799A EP 2274461 A2 EP2274461 A2 EP 2274461A2
Authority
EP
European Patent Office
Prior art keywords
layer
particles
coating
functional layer
adhesion promoter
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.)
Withdrawn
Application number
EP09718799A
Other languages
German (de)
French (fr)
Inventor
Gerhard Johner
Markus Kirst
Christian Dudazy
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.)
Coatec Gesellschaft fuer Oberflaechenveredelung mbH
Original Assignee
Coatec Gesellschaft fuer Oberflaechenveredelung mbH
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 Coatec Gesellschaft fuer Oberflaechenveredelung mbH filed Critical Coatec Gesellschaft fuer Oberflaechenveredelung mbH
Publication of EP2274461A2 publication Critical patent/EP2274461A2/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • 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
    • C23C4/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • 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
    • 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
    • C23C28/042—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 including a refractory ceramic layer, e.g. refractory metal oxides, ZrO2, rare earth oxides
    • 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
    • C23C28/044—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 coatings specially adapted for cutting tools or wear applications
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N2207/00—Location or type of the layers in shells for rollers of printing machines
    • B41N2207/02—Top layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N2207/00—Location or type of the layers in shells for rollers of printing machines
    • B41N2207/04—Intermediate layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N2207/00—Location or type of the layers in shells for rollers of printing machines
    • B41N2207/10—Location or type of the layers in shells for rollers of printing machines characterised by inorganic compounds, e.g. pigments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N2207/00—Location or type of the layers in shells for rollers of printing machines
    • B41N2207/14—Location or type of the layers in shells for rollers of printing machines characterised by macromolecular organic compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N7/00—Shells for rollers of printing machines
    • 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
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24355—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
    • 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
    • Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
    • Y10T428/269—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension including synthetic resin or polymer layer or component
    • 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
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31678—Of metal
    • 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
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31678—Of metal
    • Y10T428/31681—Next to polyester, polyamide or polyimide [e.g., alkyd, glue, or nylon, etc.]
    • 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
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31725—Of polyamide
    • Y10T428/31765—Inorganic-containing or next to inorganic-containing

Definitions

  • the invention relates to a coating of a body made of steel or carbon fiber reinforced plastic (CFRP), in particular a roller, with a primer layer applied to the body and a functional layer of oxide ceramic and / or wear-resistant cemented carbide covering the primer layer.
  • CFRP carbon fiber reinforced plastic
  • the invention also relates to a method for producing such a coating.
  • the adhesion promoter layer consists of ductile metal, which is selected from the group consisting of copper, nickel, iron, lead, tin and molybdenum and applied by plasma spraying or flame spraying.
  • RILSAN® that is, polyamides based on castor oil and PA 11 based on lactam Riisan, in particular polyamides of 11-aminoundecanoic acid (Rilsan B, PA 11) and ⁇ -laurolactam (Riisan A, PA 12) - coated steel rollers since many years to standard equipment of inking modern offset printing presses (DE 35 19 134 C1, JP 56 077 149, JP 2005 271 407). They are considered to be unproblematic with regard to undercorrosion or wear.
  • the color-friendliness of the RILSAN surfaces is particularly favorable, so that this property profile has led to the fact that the previously customary copper coverings of steel rollers in inking units of offset printing machines have long since been replaced.
  • the so-called wet offset method the printing plate is a film of water, Wel- contains an additive supplied (dampening unit) and also a film of emulsified with this water color (inking unit).
  • the water in conjunction with the additive can be very corrosive, and so corrosion damage to so-called dampening film rolls, which are coated with chromium or ceramic, well known.
  • RILSAN®-coated inking rollers By contrast, corrosion damage to RILSAN®-coated inking rollers is largely unknown, although they are also corrosively stressed by the water emulsified in the paint. RILSAN®-coated inking rollers are considered to be extremely corrosion-resistant and only show corrosion when the RILSAN® coating is destroyed locally.
  • the invention is based on the object to provide a coating that is not only extremely resistant to chemicals and corrosion, but also can provide a particularly high wear resistance.
  • the coating according to the invention of a body made of steel or CFRP material, in particular a roller has a bonding agent layer of thermoplastic material applied to the body, in whose near-surface material matrix solid (powder) mold parts are adhesively embedded such that only a portion of them Powder particle protrudes from the adhesive layer.
  • the adhesion promoter layer is covered by a functional layer of oxide ceramic and / or wear-resistant cemented carbide into which the powder particle subregions protruding from the adhesion promoter layer are embedded.
  • the powder particles thus embedded can advantageously consist of the same material as the functional layer, that is to say be oxide-ceramic and / or hard-metallic. In principle, however, it is also possible to provide solid particles of any desired chemical composition.
  • an adhesion promoter layer of thermoplastic material is first applied to the body.
  • The- The adhesion promoter layer is preferably heated to a honey-like viscosity.
  • Solid (powder) particles are embedded in a form-fitting, adhesive manner in the material matrix of the bonding agent layer heated in this way in such a way that only a partial area of these powder particles protrudes from the bonding agent layer.
  • the primer layer prepared in this way is coated with a functional layer of oxide ceramic and / or wear-resistant cemented carbide into which the powder particle subregions protruding from the adhesion promoter layer are incorporated in the course of the coating process.
  • the embedding of the outstanding solid particles in the near-surface material matrix of the adhesion promoter layer can in principle also be carried out in other ways, for example by dispersing using a sandblasting machine, a calendering machine or the like.
  • the adhesion promoter layer is preferably made of thermoplastic polyamide, in particular of the materials known under the trade names RILSAN®, NYLON and PERLON®, that is to say of polyamides based on castor oil and PA 11 based on lactam (RILSAN®), from PA 4, PA 11 (NYLON ) or PA 6 (PERLON®).
  • thermoplastic polyamide in particular of the materials known under the trade names RILSAN®, NYLON and PERLON®, that is to say of polyamides based on castor oil and PA 11 based on lactam (RILSAN®), from PA 4, PA 11 (NYLON ) or PA 6 (PERLON®).
  • the particles projecting from the adhesion promoter layer provide a particularly adherent bond of the corrosion-protecting adhesion promoter layer with the wear-resistant functional layer, which is advantageously obtained by thermal spraying of e.g. Oxide ceramics such as chromium oxide, aluminum oxide, titanium dioxide, quartz-containing mullite, zirconium oxide and mixtures thereof, and hard metals from the group tungsten carbide / cobalt, tungsten carbide / nickel, titanium carbide / nickel, nickel-chromium / chromium carbide, nickel-chromium-boron-silicon, molten carbide (pure chromium carbide), chromium, molybdenum with oxygen, is applied.
  • Oxide ceramics such as chromium oxide, aluminum oxide, titanium dioxide, quartz-containing mullite, zirconium oxide and mixtures thereof
  • hard metals from the group tungsten carbide / cobalt, tungsten carbide / nickel, titanium carbide / nickel, nickel-
  • the first powder particles are inserted into the matrix of the heated thermoplastic in a form-fitting manner. shot, so that only the tips of these Puiverpumble protrude, and then a connection with the functional layer forming the following powder particles of oxide ceramics such as Al 2 O 3, Cr 2 O 3, TiO 2, SiO 2, or ZrO 2, or mixtures thereof, or from wear-resistant hard metals such as WC / Co, Cr 3 C 2 / NiCr, NiCrBSi, WC / Ni, TiC / Ni, molybdenum, chromium etc ..
  • oxide ceramics such as Al 2 O 3, Cr 2 O 3, TiO 2, SiO 2, or ZrO 2, or mixtures thereof
  • wear-resistant hard metals such as WC / Co, Cr 3 C 2 / NiCr, NiCrBSi, WC / Ni, TiC / Ni, molybdenum, chromium etc .
  • wear-resistant hard metals such as WC / Co, Cr 3 C 2 /
  • these outer coatings can still get a non-stick coating as described in EP 0999043 A1.
  • the thermoplastic resin layer has a thickness of 0.1 to 3.0 mm, preferably 0.7 mm.
  • the sole figure shows exemplary applications for the coating according to the invention in a wet offset printing machine.
  • a printing plate mounted on a plate cylinder 1 receives ink from an inking unit 2 at its printing points and water from a dampening unit 3 at its non-printing areas.
  • the plate cylinder 1 and the brightly drawn in Fig. 1 rollers can be advantageously provided with the coating described above.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Inorganic Chemistry (AREA)
  • Ceramic Engineering (AREA)
  • Plasma & Fusion (AREA)
  • Physics & Mathematics (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Laminated Bodies (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)

Abstract

Coating of a body made of steel or CRP material, in particular a roller, using an adhesion promoter layer, which is applied to the body, made of thermoplastic, solid (powder) particles being embedded positively adhering in the material matrix proximal to the surface thereof such that only a subarea of said particles protrudes out of the adhesion promoter layer, and functional layer, which is covered using the adhesion promoter layer, made of oxide ceramic and/or low-wear hard metal, in which the particles of the areas protruding out of the adhesion promoter layer are intercalated. To produce such a coating, the adhesion promoter layer is expediently heated up to a honey-like viscosity, and powder particles are embedded positively adhering in the surface-proximal material matrix of the heated adhesion promoter layer by thermal spraying, for example, so that only the tips of said particles protrude. Said spraying is accompanied by bonding to subsequently applied powder particles, which form the functional layer made of oxide ceramic such as AI2O3, Cr2O3, TiO2, SiO2 or ZrO2 or mixtures thereof and/or low-wear hard metal such as WC/Co, Cr3C2/NiCr, NiCrBSi, WC/Ni, TiC/Ni, molybdenum or chrome or mixtures or alloys thereof.

Description

Beschichtung eines Körpers aus Stahl oder CFK-Material sowie Verfahren zum Herstellen einer solchen Beschichtung Coating of a body made of steel or CFRP material and method for producing such a coating
Die Erfindung betrifft eine Beschichtung eines Körpers aus Stahl oder Kohlefaser verstärktem Kunststoff (CFK), insbesondere einer Walze, mit einer auf den Körper aufgebrachten Haftvermittlerschicht und einer die Haftvermittlerschicht überdeckenden Funkti- oπsschicht aus Oxidkeramik und/oder verschleißarmem Hartmetall. Die Erfindung hat ferner ein Verfahren zum Herstellen einer solchen Beschichtung zum Gegenstand.The invention relates to a coating of a body made of steel or carbon fiber reinforced plastic (CFRP), in particular a roller, with a primer layer applied to the body and a functional layer of oxide ceramic and / or wear-resistant cemented carbide covering the primer layer. The invention also relates to a method for producing such a coating.
Eine Beschichtung dieser Art auf einem CFK-Körper ist aus DE 10 2005 008 487 A1 bekannt. Dabei besteht die Haftvermittlerschicht aus duktilem Metall, das aus der Gruppe Kupfer, Nickel, Eisen, Blei, Zinn und Molybdän ausgewählt und durch Plasmaspritzen oder Flammspritzen aufgetragen ist.A coating of this type on a CFRP body is known from DE 10 2005 008 487 A1. In this case, the adhesion promoter layer consists of ductile metal, which is selected from the group consisting of copper, nickel, iron, lead, tin and molybdenum and applied by plasma spraying or flame spraying.
Des weiteren gehören mit RILSAN® - das heißt Polyamiden auf Basis Rizinusöl und PA 11 auf Basis Lactam Riisan, insbesondere Polyamide aus 11-Aminoundecansäure (Rilsan B, PA 11) und aus ω-Laurinlactam (Riisan A, PA 12) - beschichtete Stahlwalzen seit vielen Jahren zur Standardausrüstung von Farbwerken moderner Offset- Druckmaschinen (DE 35 19 134 C1 , JP 56 077 149, JP 2005 271 407). Sie gelten als unproblematisch bezüglich Unterkorrosion oder Verschleiß. Als besonders günstig gilt die Farbfreundlichkeit der RILSAN-Oberflächen, so dass dieses Eigenschaftsprofil dazu geführt hat, dass die früher üblichen Kupferbezüge von Stahlwalzen in Farbwerken der Offset-Druckmaschinen längst abgelöst wurden. Im am weitesten verbreiteten Offsetverfahren, dem sog. Nassoffsetverfahren, wird der Druckplatte ein Film aus Wasser, wel- ches ein Additiv enthält, zugeführt (Feuchtwerk) und ebenso ein Film aus mit diesem Wasser emulgierter Farbe (Farbwerk). Das Wasser in Verbindung mit dem Additiv kann sehr korrosiv wirken, und so sind Korrosionsschäden an sogenannten Feuchtwerksfilm- walzen, die mit Chrom oder Keramik beschichtet sind, durchaus bekannt. Dagegen sind Korrosionsschäden an RILSAN®-beschichteten Farbwerkswalzen weitgehend unbekannt, obwohl diese über das in der Farbe emulgierte Wasser auch korrosiv beansprucht werden. RILSAN®-beschichtete Farbwerkswalzen gelten als extrem korrosionsbeständig und zeigen nur Unterrostungen wenn die RILSAN®-Beschichtung lokal zerstört ist.Furthermore, coated with RILSAN® - that is, polyamides based on castor oil and PA 11 based on lactam Riisan, in particular polyamides of 11-aminoundecanoic acid (Rilsan B, PA 11) and ω-laurolactam (Riisan A, PA 12) - coated steel rollers since many years to standard equipment of inking modern offset printing presses (DE 35 19 134 C1, JP 56 077 149, JP 2005 271 407). They are considered to be unproblematic with regard to undercorrosion or wear. The color-friendliness of the RILSAN surfaces is particularly favorable, so that this property profile has led to the fact that the previously customary copper coverings of steel rollers in inking units of offset printing machines have long since been replaced. In the most widely used offset method, the so-called wet offset method, the printing plate is a film of water, Wel- contains an additive supplied (dampening unit) and also a film of emulsified with this water color (inking unit). The water in conjunction with the additive can be very corrosive, and so corrosion damage to so-called dampening film rolls, which are coated with chromium or ceramic, well known. By contrast, corrosion damage to RILSAN®-coated inking rollers is largely unknown, although they are also corrosively stressed by the water emulsified in the paint. RILSAN®-coated inking rollers are considered to be extremely corrosion-resistant and only show corrosion when the RILSAN® coating is destroyed locally.
Der Erfindung liegt nun die Aufgabe zugrunde, eine Beschichtung bereit zu stellen, die nicht nur extrem Chemikalien- und korrosionsbeständig ist, sondern darüber hinaus auch eine besonders hohe Verschleißfestigkeit bereitstellen kann.The invention is based on the object to provide a coating that is not only extremely resistant to chemicals and corrosion, but also can provide a particularly high wear resistance.
Diese Aufgabe wird durch die Beschichtung gemäß Anspruch 1 sowie durch das Verfahren gemäß Anspruch 10 gelöst.This object is achieved by the coating according to claim 1 and by the method according to claim 10.
Die erfindungsgemäße Beschichtung eines Körpers aus Stahl oder CFK-Material, insbesondere einer Walze, weist eine auf den Körper aufgebrachte Haftvermittlerschicht aus thermoplastischem Kunststoff auf, in dessen oberflächennahe Werkstoffmatrix Feststoff- (Pulver-) partskel formschlüssig haftend derart eingebettet sind, dass nur ein Teilbereich dieser Pulverpartikel aus der Haftvermittlerschicht herausragt. Die Haftvermittlerschicht ist von einer Funktionsschicht aus Oxidkeramik und/oder verschleißarmem Hartmetall überdeckt, in welche die aus der Haftvermittlerschicht herausragenden Pulverpartikel- Teilbereiche eingelagert sind. Die so eingebetteten Pulverpartikel können vorteilhaft aus dem gleichen Werkstoff wie die Funktionsschicht bestehen, das heißt oxidkeramisch und/oder hartmetallisch sein. Grundsätzlich können aber dafür auch Feststoffpartikel beliebiger chemischer Zusammensetzung vorgesehen sein.The coating according to the invention of a body made of steel or CFRP material, in particular a roller, has a bonding agent layer of thermoplastic material applied to the body, in whose near-surface material matrix solid (powder) mold parts are adhesively embedded such that only a portion of them Powder particle protrudes from the adhesive layer. The adhesion promoter layer is covered by a functional layer of oxide ceramic and / or wear-resistant cemented carbide into which the powder particle subregions protruding from the adhesion promoter layer are embedded. The powder particles thus embedded can advantageously consist of the same material as the functional layer, that is to say be oxide-ceramic and / or hard-metallic. In principle, however, it is also possible to provide solid particles of any desired chemical composition.
Gemäß dem erfindungsgemäßen Verfahren zum Herstellen einer Beschichtung eines Körpers aus Stahl oder CFK-Material, insbesondere einer Walze, wird auf den Körper zunächst eine Haftvermittlerschicht aus thermoplastischem Kunststoff aufgebracht. Die- se Haftvermittlerschicht wird vorzugsweise bis zu einer honigähnlichen Viskosität erwärmt. In die oberfiächennahe Werkstoffmatrix der so erwärmten Haftvermittlerschicht werden Feststoff- (Pulver-) Partikel formschlüssig haftend derart eingebettet, dass nur ein Teilbereich dieser Pulverpartikel aus der Haftvermittlerschicht herausragt. Die so vorbereitete Haftvermittlerschicht wird mit einer Funktionsschicht aus Oxidkeramik und/oder verschleißarmem Hartmetall beschichtet, in welche sich die aus der Haftvermittlerschicht herausragenden Pulverpartikel-Teilbereiche im Zuge des Beschichtungs- vorgangs einlagern. Das Einbetten der herausragenden Feststoffpartikel in die oberflächennahe Werkstoffmatrix der Haftvermittlerschicht kann aber grundsätzlich auch auf andere Weise erfolgen, beispielsweise durch Eindispergieren unter Verwendung einer Sandstrahlanlage, einer Kalanderanlage oder dergleichen.According to the method according to the invention for producing a coating of a body made of steel or CFRP material, in particular a roller, an adhesion promoter layer of thermoplastic material is first applied to the body. The- The adhesion promoter layer is preferably heated to a honey-like viscosity. Solid (powder) particles are embedded in a form-fitting, adhesive manner in the material matrix of the bonding agent layer heated in this way in such a way that only a partial area of these powder particles protrudes from the bonding agent layer. The primer layer prepared in this way is coated with a functional layer of oxide ceramic and / or wear-resistant cemented carbide into which the powder particle subregions protruding from the adhesion promoter layer are incorporated in the course of the coating process. However, the embedding of the outstanding solid particles in the near-surface material matrix of the adhesion promoter layer can in principle also be carried out in other ways, for example by dispersing using a sandblasting machine, a calendering machine or the like.
Die Haftvermittlerschicht besteht vorzugsweise aus thermoplastischem Polyamid, insbesondere aus den unter den Handelsnamen RILSAN®, NYLON und PERLON® bekannten Werkstoffen, das heißt aus Polyamiden auf Basis Rizinusöl und PA 11 auf Basis Lactam (RILSAN®), aus PA 4, PA 11 (NYLON) oder PA 6 (PERLON®). Solche thermoplastischen Kunststoffüberzüge erlauben den Einsatz von niedrig legierten, vor Rost ungeschützten Baustählen oder CFK-Werkstoffen.The adhesion promoter layer is preferably made of thermoplastic polyamide, in particular of the materials known under the trade names RILSAN®, NYLON and PERLON®, that is to say of polyamides based on castor oil and PA 11 based on lactam (RILSAN®), from PA 4, PA 11 (NYLON ) or PA 6 (PERLON®). Such thermoplastic plastic coatings allow the use of low-alloy, rust-protected structural steels or CFRP materials.
Die aus der Haftvermittlerschicht vorragenden Partikel sorgen ihrerseits für eine besonders haftfeste Verbindung der vor Korrosion schützenden Haftvermittlerschicht mit der verschleißfesten Funktionsschicht, die vorteilhaft durch thermisches Spritzen von z.B. Oxidkeramiken wie Chromoxid, Aluminiumoxid, Titandioxid, quarzhaltiges Mullit, Zirko- noxid und deren Mischungen, sowie Hartmetalle aus der Gruppe Wolframkarbid/Kobalt, Wolframkarbid/Nickel, Titankarbid/Nickel, Nickel-Chrom/Chromkarbid, Nickel-Chrom- Bor-Silizium, Schmelzkarbid (reines Chromkarbid), Chrom, Molybdän mit Sauerstoff, aufgetragen wird.The particles projecting from the adhesion promoter layer, in turn, provide a particularly adherent bond of the corrosion-protecting adhesion promoter layer with the wear-resistant functional layer, which is advantageously obtained by thermal spraying of e.g. Oxide ceramics such as chromium oxide, aluminum oxide, titanium dioxide, quartz-containing mullite, zirconium oxide and mixtures thereof, and hard metals from the group tungsten carbide / cobalt, tungsten carbide / nickel, titanium carbide / nickel, nickel-chromium / chromium carbide, nickel-chromium-boron-silicon, molten carbide (pure chromium carbide), chromium, molybdenum with oxygen, is applied.
Im Zuge der Beschichtung der auf honigähnliche Viskosität erwärmten Haftvermitfler- schicht, vorzugsweise durch thermisches Spritzen, werden die ersten Pulverpartikel in die Matrix des erwärmten thermoplastischen Kunststoffs formschlüssig haftend einge- schossen, so dass nur noch die Spitzen dieser Puiverpartikel herausragen und dann eine Verbindung mit den die Funktionsschicht bildenden folgenden Pulverpartikeln aus Oxidkeramik wie z.B. AI2O3, Cr2O3, TiO2, SiO2, oder ZrO2 bzw. Mischungen daraus, oder aus verschleißarmen Hartmetallen wie z.B. WC/Co, Cr3C2/NiCr, NiCrBSi, WC/Ni, TiC/Ni, Molybdän, Chrom etc eingehen. Wie vorstehend schon erwähnt, ist es aber auch möglich, vorstehende Feststoffpartikel beliebiger chemischer Zusammensetzung auf andere Weise in die oberfiächennahe Werkstoffmatrix einzubringen.In the course of the coating of the adhesion-promoting layer, which has been heated to a honey-like viscosity, preferably by thermal spraying, the first powder particles are inserted into the matrix of the heated thermoplastic in a form-fitting manner. shot, so that only the tips of these Puiverpartikel protrude, and then a connection with the functional layer forming the following powder particles of oxide ceramics such as Al 2 O 3, Cr 2 O 3, TiO 2, SiO 2, or ZrO 2, or mixtures thereof, or from wear-resistant hard metals such as WC / Co, Cr 3 C 2 / NiCr, NiCrBSi, WC / Ni, TiC / Ni, molybdenum, chromium etc .. As already mentioned above, it is also possible to introduce the above solid particles of any chemical composition into the near-surface material matrix in another way.
Gegebenenfalls können diese äußeren Beschichtungen auch noch wie in EP 0999043 A1 beschrieben eine Antihaftversiegelung bekommen.Optionally, these outer coatings can still get a non-stick coating as described in EP 0999043 A1.
In der bevorzugten Ausführungsform weist die thermoplastische Kunststoffschicht eine Dicke von 0,1 bis 3,0 mm, vorzugsweise 0,7 mm, auf.In the preferred embodiment, the thermoplastic resin layer has a thickness of 0.1 to 3.0 mm, preferably 0.7 mm.
Je nach Anwendungsfall sind Oberflächengüten erforderlich, die einen Schleif- und Poliervorgang nach dem Beschichten erfordern, so dass die Funktionsschicht auf dem Überzug aus thermoplastischem Kunststoff eine Oberflächenrauhigkeit aufweist, die vorzugsweise zwischen 0,5 μm < Rz < 500 μm, insbesondere bei R2 = 1 ,5 bis 20 μm liegt.Depending on the application surface finishes are required, which require a grinding and polishing process after coating, so that the functional layer on the coating of thermoplastic material has a surface roughness, preferably between 0.5 .mu.m <R z <500 .mu.m, in particular at R 2 = 1, 5 to 20 microns.
Die einzige Figur zeigt beispielhafte Anwendungsmöglichkeiten für die erfindungsgemäße Beschichtung in einer Nassoffset-Druckmaschine.The sole figure shows exemplary applications for the coating according to the invention in a wet offset printing machine.
Dabei nimmt in an sich bekannter Weise eine auf einen Plattenzylinder 1 aufgespannte Druckplatte an ihren druckenden Stellen Druckfarbe von einem Farbwerk 2 und an ihren nicht druckenden Bereichen Wasser von einem Feuchtwerk 3 auf. Insbesondere der Plattenzylinder 1 und die in Fig. 1 hell eingezeichneten Walzen können vorteilhaft mit der vorstehend beschriebenen Beschichtung versehen sein. In this case, in a manner known per se, a printing plate mounted on a plate cylinder 1 receives ink from an inking unit 2 at its printing points and water from a dampening unit 3 at its non-printing areas. In particular, the plate cylinder 1 and the brightly drawn in Fig. 1 rollers can be advantageously provided with the coating described above.

Claims

Ansprüche claims
1. Beschichtung eines Körpers aus Stahl oder CFK-Material, insbesondere einer Walze, mit einer auf den Körper aufgebrachten Haftvermittlerschicht aus thermoplastischem Kunststoff, in dessen oberflächennahe Werkstoffmatrix Feststoff- (Pulver-) partikel formschlüssig haftend derart eingebettet sind, dass nur ein Teilbereich dieser Partikel aus der Haftvermittlerschicht herausragt, sowie mit einer die Haftvermittlerschicht überdeckenden Funktionsschicht aus Oxidkeramik und/oder verschleißarmem Hartmetall, in welche die aus der Haftvermittlerschicht herausragenden Partikel-Teilbereiche eingelagert sind.1. coating a body made of steel or CFRP material, in particular a roller, with an applied on the body adhesive layer of thermoplastic material, in the near-surface material matrix solid (powder) particles are positively adherent embedded such that only a portion of these particles protrudes from the adhesive layer, as well as with the adhesion promoter layer covering functional layer of oxide ceramic and / or low-wear hard metal, in which the protruding from the adhesive layer particle partial areas are embedded.
2. Beschichtung nach Anspruch 1 , dadurch gekennzeichnet, dass die Oxidkeramik aus AI2O3, Cr2O3, T1O2, SiO2 oder ZrO2 oder aus einer Mischung aus zwei oder mehr dieser Werkstoffe besteht.2. Coating according to claim 1, characterized in that the oxide ceramic of Al 2 O 3 , Cr 2 O 3 , T1O2, SiO 2 or ZrO 2 or consists of a mixture of two or more of these materials.
3. Beschichtung nach Anspruch 1 , dadurch gekennzeichnet, dass das Hartmetall aus WC/Co, Cr3C2/NiCr, NiCrBSi, WC/Ni, TiC/Ni, Molybdän oder Chrom oder aus einer Mischung oder Legierung aus zwei oder mehr dieser Werkstoffe besteht.3. Coating according to claim 1, characterized in that the hard metal of WC / Co, Cr 3 C 2 / NiCr, NiCrBSi, WC / Ni, TiC / Ni, molybdenum or chromium or a mixture or alloy of two or more of these materials consists.
4. Beschichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die in die oberflächennahe Werkstoffmatrix der Haftvermittlerschicht eingebetteten Partikel aus dem gleichen Werkstoff wie die Funktionsschicht bestehen.4. Coating according to one of the preceding claims, characterized in that the embedded in the near-surface material matrix of the bonding agent layer particles consist of the same material as the functional layer.
5. Beschichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Oberfläche der Funktionsschicht geschliffen oder poliert ist.5. Coating according to one of the preceding claims, characterized in that the surface of the functional layer is ground or polished.
6. Beschichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Oberfläche der Funktionsschicht eine Oberflächenrauhigkeit hat, die zwischen 0,5 μm < Rz < 500 μm, insbesondere bei Rz = 1 ,5 μm bis 20 μm, liegt. 6. Coating according to one of the preceding claims, characterized in that the surface of the functional layer has a surface roughness which is between 0.5 μm <Rz <500 μm, in particular at Rz = 1, 5 μm to 20 μm.
7. Beschichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Haftvermittlerschicht eine Dicke von 0,1 mm bis 3,0 mm, vorzugsweise etwa 0,7 mm, aufweist.7. Coating according to one of the preceding claims, characterized in that the adhesion promoter layer has a thickness of 0.1 mm to 3.0 mm, preferably about 0.7 mm.
8. Beschichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Haftvermittlerschicht aus Polyamid besteht.8. Coating according to one of the preceding claims, characterized in that the adhesive layer consists of polyamide.
9. Beschichtung nach Anspruch 8, dass die Haftvermittierschicht aus RILSAN® (Polyamide auf Basis Rizinusöl und PA 11 auf Basis Lactam), NYLON (PA 4, PA 11) oder PERLON® (PA 6) besteht.9. Coating according to claim 8, that the adhesion-promoting layer consists of RILSAN® (polyamides based on castor oil and PA 11 based on lactam), NYLON (PA 4, PA 11) or PERLON® (PA 6).
10. Verfahren zum Herstellen einer Beschichtung eines Körpers aus Stahl oder CFK- Material, insbesondere einer Walze, bei dem auf den Körper eine Haftvermittlerschicht aus thermo-plastischem Kunststoff aufgebracht wird, bei dem in die oberflächennahe Werkstoffmatrix der so erwärmten Haftvermittlerschicht Feststoff- (Pulver-) partikel formschlüssig haftend derart eingebettet werden, dass nur ein Teilbereich dieser Partikel aus der Haftvermittlerschicht herausragt, und bei dem die derart vorbereitete Haftvermittlerschicht mit einer Funktionsschicht aus Oxidkeramik und/oder verschleißarmem Hartmetall beschichtet wird, in welche sich die aus der Haftvermittlerschicht herausragenden Partikel-Teilbereiche im Zuge des Beschichtungsvorgangs einlagern.10. A method for producing a coating of a body made of steel or CFRP material, in particular a roller, in which a bonding agent layer of thermoplastic material is applied to the body, in which in the near-surface material matrix of the thus heated adhesive layer solid (powder ) particles are embedded in a form-fitting manner such that only a portion of these particles protrudes from the bonding agent layer, and in which the primer layer prepared in this way is coated with a functional layer of oxide ceramic and / or low-wear hard metal into which the particle subregions protruding from the adhesion promoter layer store in the course of the coating process.
11. Verfahren nach Anspruch 10, bei dem die Haftvermittierschicht zum Einbetten der Feststoff- (Pulver-) partikel bis zu einer honigähnlichen Viskosität erwärmt wird.A method according to claim 10, wherein the primer layer is heated to embedding the solid (powder) particles to a honey-like viscosity.
12. Verfahren nach Anspruch 1 1 , bei dem die Partikel in die oberflächennahe Werkstoffmatrix der erwärmten Haftvermittierschicht eingeschossen werden.12. The method of claim 1 1, wherein the particles are injected into the near-surface material matrix of the heated Haftvermittierschicht.
13. Verfahren nach Anspruch 1 1 , bei dem das Einschießen der Partikel durch thermisches Spritzen erfolgt.13. The method of claim 1 1, wherein the injection of the particles takes place by thermal spraying.
14. Verfahren nach einem der Ansprüche 10 bis 13, bei dem die Funktionsschicht auf die mit herausragenden Partikeln bestückte Haftvermittierschicht durch thermi- sches Spritzen aufgebracht wird, wobei der herausragende Teilbereich der Partikel formschlüssig haftend in die Funktionsschicht eingebettet wird,14. The method according to any one of claims 10 to 13, wherein the functional layer on the equipped with protruding particles Haftvermittierschicht by thermal the syringe is applied, wherein the protruding portion of the particles is embedded in a form-fitting manner in the functional layer,
15. Verfahren nach einem der Ansprüche 10 bis 14, bei dem der Körper während der Beschichtungsvorgänge mit einer Relativgeschwindigkeit von mindestens 0,2 m/s relativ zu der verwendeten Beschichtungsvorrichtung bewegt und durch Kühlmaßnahmen auf einer Temperatur von nicht mehr als 200 °C gehalten wird.15. The method according to any one of claims 10 to 14, wherein the body during the coating operations at a relative speed of at least 0.2 m / s is moved relative to the coating apparatus used and maintained by cooling measures at a temperature of not more than 200 ° C. ,
16. Verfahren nach einem der Ansprüche 10 bis 15, bei dem die Haftvermittlerschicht in einer Dicke von 0,1 mm bis 3,0 mm, vorzugsweise etwa 0,7 mm, aufgebracht wird.16. The method according to any one of claims 10 to 15, wherein the primer layer is applied in a thickness of 0.1 mm to 3.0 mm, preferably about 0.7 mm.
17. Verfahren nach einem der Ansprüche 10 bis 16, bei dem die Oberfläche der Funktionsschicht geschliffen oder poliert wird.17. The method according to any one of claims 10 to 16, wherein the surface of the functional layer is ground or polished.
18. Verfahren nach Anspruch 17, bei dem die Oberfläche der Funktionsschicht auf eine Oberflächenrauhigkeit zwischen 0,5 μm < Rz < 500 μm, insbesondere auf Rz = 1 ,5 μm bis 20 μm, geschliffen oder poliert wird.18. The method of claim 17, wherein the surface of the functional layer is ground or polished to a surface roughness between 0.5 .mu.m <Rz <500 .mu.m, in particular to Rz = 1, 5 .mu.m to 20 .mu.m.
19. Verfahren nach einem der Ansprüche 10 bis 18, bei dem die Haftvermittlerschicht aus Polyamid hergestellt wird.19. The method according to any one of claims 10 to 18, wherein the adhesive layer is made of polyamide.
20. Verfahren nach Anspruch 19, bei dem die Haftvermittlerschicht aus RILSAN® (Polyamide auf Basis Rizinusöl und PA 11 auf Basis Lactam), NYLON (PA 4, PA 1 1) oder PERLON® (PA 6) hergestellt wird.20. The method of claim 19, wherein the primer layer of RILSAN® (polyamides based on castor oil and PA 11 based on lactam), NYLON (PA 4, PA 1 1) or PERLON® (PA 6) is produced.
21. Verfahren nach einem der Ansprüche 10 bis 20, bei dem die Funktionsschicht aus AI2O3, Cr2Os, Tiθ2, SiO2 oder ZrO2 oder aus einer Mischung aus zwei oder mehr dieser Werkstoffe hergestellt wird.21. The method according to any one of claims 10 to 20, wherein the functional layer of Al 2 O 3 , Cr 2 Os, Tiθ 2 , SiO 2 or ZrO 2 or from a mixture of two or more of these materials is prepared.
22. Verfahren nach einem der Ansprüche 10 bis 20, bei dem die Funktionsschicht aus WC/Co, Cr3C2/NiCr, NiCrBSi, WC/Ni, TiC/Ni, Molybdän oder Chrom oder aus einer Mischung oder Legierung aus zwei oder mehr dieser Werkstoffe hergestellt wird. 22. The method according to any one of claims 10 to 20, wherein the functional layer of WC / Co, Cr 3 C 2 / NiCr, NiCrBSi, WC / Ni, TiC / Ni, molybdenum or chromium or a mixture or alloy of two or more of these materials is produced.
EP09718799A 2008-03-04 2009-02-25 Coating of a body made of steel or crp material and method for producing such a coating Withdrawn EP2274461A2 (en)

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