EXHAUST VALVE FOR DIESEL ENGINE

PURPOSE:To ensure corrosion and impact resistances for a sheet surface and to enhance the adhesive strength to the base metal by spraying ceramics and metal on a part for forming the sheet surface to form the sheet surface so that the ceramics concn. is increased upward. CONSTITUTION:Ceramics 3 and...

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Bibliographische Detailangaben
Hauptverfasser:	TOYODA KOUJI, MIZUSHINA MASAAKI, OKAMOTO HIROKI, YAMADA TAKEMI, SATOU TAMATAROU
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING 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 COMBUSTION ENGINES COMBUSTION ENGINES IN GENERAL CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES DIFFUSION TREATMENT OF METALLIC MATERIAL ENGINE PLANTS IN GENERAL HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES ORMATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHERTHAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUSSUBCLASSES OF CLASSES F01-F04 INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL INTERNAL-COMBUSTION PISTON ENGINES LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING METALLURGY STEAM ENGINES SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION WEAPONS
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Beschreibung
Zusammenfassung:	PURPOSE:To ensure corrosion and impact resistances for a sheet surface and to enhance the adhesive strength to the base metal by spraying ceramics and metal on a part for forming the sheet surface to form the sheet surface so that the ceramics concn. is increased upward. CONSTITUTION:Ceramics 3 and metal 4 are sprayed on the surface of a base metal B to form a sprayed layer A consisting of a plurality of layers A1-A5 having different ceramics concns. The uppermost layer A5 is largely made of only the ceramics 3, the undermost layer A1 is largely made of only the metal 4, and the intermediate layers A2-A4 are formed so that the ceramics concn. is increased upward. Al2O3, TiO2, ZrO2 or the like is used as the ceramics 3, and an Ni-Cr-Al alloy for spraying with superior corrosion resistance, an Ni-Cr-Mo alloy with superior strengh and an Ni-Cr-Co alloy with superior corrosion resistance and strength are used as the metal 4 at the surface side, the under layer side and the intermediate layers, respectively.