ORNAMENT AND METHOD FOR PREPARATION THEREOF

• Main Authors: INOUE, TAKESHI, MEGURO, AKIRA, KUSHIDA, HACHIROU, HAMANO, KAZUMI, IKEDA, SHINJI, TANOKURA, YUKIO, ANDOU, YOSHITUGU, HANAI, KENJI
• Format: Patent
• Language: English
• Published: 18.11.2011
• Subjects: BRACELETS; 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; COINS; DIFFUSION TREATMENT OF METALLIC MATERIAL; HABERDASHERY; HOROLOGY; HUMAN NECESSITIES; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; JEWELLERY; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; MECHANICALLY-DRIVEN CLOCKS OR WATCHES; METALLURGY; OTHER PERSONAL ADORNMENTS; PHYSICS; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS

An ornament, such as external ornamental parts of a watch, which comprises a substrate comprising stainless steel, titanium or titanium alloy and having a hardened layer comprising a solid solution of at least one type of atom selected from the group consisting of a carbon atom, a nitrogen atom and oxygen atom in the substrate and, formed on the surface of the hardened layer, a hard coating film such as TiC or TiN. The ornament has excellent resistance to scratching without detriment to the corrosion-resistant property of the substrate and can have a variety of colors such as gold, and thus is significantly valuable from an ornamental point of view.