Tableware and method for surface treatment thereof, substrate having hard decorative coating film and method for production thereof

Tableware of Ti or a Ti alloy having a surface hardened layer comprising a first hardened layer in which nitrogen and oxygen are diffused so as to form a solid solution and a second hardened layer which is formed in a region deeper than the first hardened layer. The substrate may have a hard decorat...

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Bibliographische Detailangaben
Hauptverfasser:	MIYA YUKIO, KUSHIDA HACHIROU, FUKUMURA YUTAKA
Format:	Patent
Sprache:	eng
Schlagworte:	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 COFFEE MILLS DECORATIVE ARTS DIFFUSION TREATMENT OF METALLIC MATERIAL DOMESTIC ARTICLES OR APPLIANCES FURNITURE HOUSEHOLD OR TABLE EQUIPMENT HUMAN NECESSITIES INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL METALLURGY MOSAICS PAPERHANGING PERFORMING OPERATIONS PRODUCING DECORATIVE EFFECTS SPECIAL DESIGNS OR PICTURES SPICE MILLS SUCTION CLEANERS IN GENERAL SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TARSIA WORK TRANSPORTING
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Beschreibung
Zusammenfassung:	Tableware of Ti or a Ti alloy having a surface hardened layer comprising a first hardened layer in which nitrogen and oxygen are diffused so as to form a solid solution and a second hardened layer which is formed in a region deeper than the first hardened layer. The substrate may have a hard decorative coating film. A substrate comprising Ti or a Ti alloy has on its surface an internal hardened layer comprising a first hardened layer and a second hardened layer, wherein the hard decorative coating film is formed on the surface of the internal hardened layer. The cutlery comprises a working part and a grip, the grip provided with a floating means such as a hollow part. Titanium tableware having excellent long-term mar resistance and high quality appearance, increasing the decorative value of the tableware. Further, a process for surface treatment to obtain the titanium tableware with high productivity and a substrate having a hard decorative coating film with excellent mar resistance and high surface hardness. The cutlery is lightweight, mar-resistant and can be easily handled.