ROLLER FOR CONVEYING HIGH-TEMPERATURE STEEL STOCK

PURPOSE:To obtain a roller tor conveying high-temp. steel stocks free from peeling and having superior durability, by coating the outside peripheral surface of a shaft core made of steel with cermet by means of thermal spraying and then applying heat treatment to the above at a specific temp. so as...

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Bibliographische Detailangaben
Hauptverfasser:	ANDO SADAICHI, TAMURA SHINICHI
Format:	Patent
Sprache:	eng
Schlagworte:	BEARINGS BLASTING CASTING CASTING OF METALS CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES 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 MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL ELEMENTS OR CRANKSHAFT MECHANISMS ENGINEERING ELEMENTS AND UNITS FLEXIBLE SHAFTS GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL LIGHTING MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS MECHANICAL ENGINEERING MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS PERFORMING OPERATIONS POWDER METALLURGY PUNCHING METAL ROLLING OF METAL ROTARY BODIES OTHER THAN GEARING ELEMENTS SHAFTS SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION THERMAL INSULATION IN GENERAL TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	PURPOSE:To obtain a roller tor conveying high-temp. steel stocks free from peeling and having superior durability, by coating the outside peripheral surface of a shaft core made of steel with cermet by means of thermal spraying and then applying heat treatment to the above at a specific temp. so as to diffuse respective metals contained in the above steel shaft core and cermet. CONSTITUTION:The outside peripheral surface of a shaft core made of steel is coated with a cermet having high toughness and excellent in heat resistance and heat-insulating property by means of thermal spraying. As the above cermet, for example, the one which has a composition consisting of about 51-95vol% ceramics, such as Al2O3, and the balance composed principally of Co and Ni and further containing Cr, Mo, Fe, Al, Y, Si, etc., is suitably used. Further, the proper thickness of the thermally sprayed film is about 0.1-2mm. Subsequently, heat treatment is applied to the resulting cermet-thermally-sprayed roller at 800-1200 deg.C. By this heat treatment, respective metals contained in the above steel shaft core and cermet are diffused and the adhesive strength between both is improved. By this method, the long-life roller for conveying high-temp. steel stocks excellent in peeling resistance can be obtained.