Process for making wear-resistant coatings

A paint system and process are disclosed for hardfacing metal surfaces. In one embodiment of the process, a paint including a dispersion of hard particles is first applied as a coating to a surface. Next, a paint including a dispersion of a braze alloy is applied over the layer of hard particles. Th...

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Bibliographische Detailangaben
Hauptverfasser:	BRETON ERNEST J, HANDZEL JOHN M, TENNANT OTIS K
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL CHEMICAL PAINT OR INK REMOVERS CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL CORRECTING FLUIDS DIFFUSION TREATMENT OF METALLIC MATERIAL DYES FILLING PASTES INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL INKS METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING PERFORMING OPERATIONS POLISHES PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL SPRAYING OR ATOMISING IN GENERAL SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TRANSPORTING USE OF MATERIALS THEREFOR WOODSTAINS
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Beschreibung
Zusammenfassung:	A paint system and process are disclosed for hardfacing metal surfaces. In one embodiment of the process, a paint including a dispersion of hard particles is first applied as a coating to a surface. Next, a paint including a dispersion of a braze alloy is applied over the layer of hard particles. The surface is then heated to cause the braze alloy to melt and infiltrate into the hard particles thereby bonding them to the metallic surface. In another embodiment, a first layer of adhesive is applied, and a hardfacing powder is applied onto the adhesive. Then a second layer of adhesive is applied, and a braze alloy powder is applied onto the second adhesive. Then the material is heated as in the first embodiment. In another embodiment, paint containing hard particles is coated onto the substrate, and an acid-containing cross-linked copolymer in the paint is then neutralized to increase the viscosity of the paint to prevent running.