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OwnerGerhard Johner, Marku Kirst +1inventors
InventorsGerhard Johner, Marku Kirst, Christian Dudazy
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There is provided a coating for a body of steel or a carbon fiber reinforced plastic material, particularly a roller, with an adhesion-promoting layer of thermoplastic that is deposited on the body, in the surface near material matrix of which solid (powder) particles are embedded in a form-fitting adhering manner such that only a partial region of these particles projects from the adhesion promoting layer, as well as with a functional layer of oxide ceramic or wear-resistant hard metal overlaying the adhesion-promoting layer, in which the partial regions of the particles projecting from the adhesion-promoting layer are embedded. For producing such a coating, the adhesion-promoting layer preferably is heated to a honey-like viscosity, and powder particles are injected, for example by thermal spraying, into the surface near material matrix of the heated adhesion-promoting layer in a form-fitting adhering manner such that only the tips of these particles project. These tips connect to subsequently deposited powder particles which form the functional layer of oxide ceramic such as Al2O3, Cr2O3, TiO2, SiO2 or ZrO2 or mixtures therefrom and/or wear resistant hard metal such as WC/Co, Cr3C2/NiCr, NiCrBSi, WC/Ni, TiC/Ni, molybdenum, or chromium or mixtures or alloys thereof
1-22. (canceled)
A coating for a body of steel or a carbon fiber reinforced plastic roller comprising:
The coating of claim 1 wherein the oxide ceramic is selected from the group consisting of Al2O3, Cr2O3, TiO2, SiO2, or ZrO2 or mixtures of two or more of these materials.
The coating of claim 1 wherein the hard metal is selected from the group consisting of WC/Co, Cr3C2/NiCr, NiCrBSi, WC/Ni, TiC/Ni, molybdenum or chromium, or a mixture or an alloy of two or more of these materials.
The coating of claim 1 wherein the solid powder particles embedded within the near surface particle matrix of the adhesion-promoting layer comprise the same material as the functional layer.
The coating of claim 1 wherein a surface of the functional layer is grinded or polished.
The coating of claim 1 wherein a surface of the functional layer has a surface roughness in the range of 0.5 μm<Rz<500 μm.
The coating of claim 1 wherein the adhesion-promoting layer has a thickness of about 0.1 mm to about 3.0 mm.
The coating of claim 1 wherein the adhesion-promoting layer comprises a polyamide.
A method for producing a coating of a body of steel or carbon fiber reinforced plastic roller comprising the steps of:
Dependencies are inferred from the claim text.