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1. (WO1997017479) SURFACE-HARDENED TITANIUM MATERIAL, SURFACE HARDENING METHOD OF TITANIUM MATERIAL, WATCHCASE DECORATION ARTICLE, AND DECORATION ARTICLE
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1997/017479 International Application No.: PCT/JP1996/003285
Publication Date: 15.05.1997 International Filing Date: 08.11.1996
Chapter 2 Demand Filed: 30.05.1997
IPC:
C23C 10/28 (2006.01) ,C23C 10/48 (2006.01)
C CHEMISTRY; METALLURGY
23
COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
C
COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
10
Solid state diffusion of only metal elements or silicon into metallic material surfaces
28
using solids, e.g. powders, pastes
C CHEMISTRY; METALLURGY
23
COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
C
COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
10
Solid state diffusion of only metal elements or silicon into metallic material surfaces
28
using solids, e.g. powders, pastes
34
Embedding in a powder mixture, i.e. pack cementation
36
only one element being diffused
48
Aluminising
Applicants:
CITIZEN WATCH CO., LTD. [JP/JP]; 1-1, Nishi-Shinjuku 2-chome Shinjuku-ku Tokyo 163-04, JP (AllExceptUS)
OGASAWARA, Naoto [JP/JP]; JP (UsOnly)
KUSANO, Yasumasa [JP/JP]; JP (UsOnly)
ITOH, Shizue [JP/JP]; JP (UsOnly)
ISHIYAMA, Kotarou [JP/JP]; JP (UsOnly)
Inventors:
OGASAWARA, Naoto; JP
KUSANO, Yasumasa; JP
ITOH, Shizue; JP
ISHIYAMA, Kotarou; JP
Agent:
OSAWA, Takashi ; Room 818 Ikebukuro White House Building 20-2, Higashi-Ikebukuro 1-chome Toshima-ku Tokyo 170, JP
Priority Data:
7/28960108.11.1995JP
8/11749913.05.1996JP
Title (EN) SURFACE-HARDENED TITANIUM MATERIAL, SURFACE HARDENING METHOD OF TITANIUM MATERIAL, WATCHCASE DECORATION ARTICLE, AND DECORATION ARTICLE
(FR) MATERIAU A BASE DE TITANE DURCI EN SURFACE, SON PROCEDE DE DURCISSEMENT, ARTICLE DECORATIF POUR BOITIER DE MONTRE ET ARTICLE DECORATIF
Abstract:
(EN) A method of hardening surfaces of a titanium-base material, wherein titanium-aluminum alloy powder or aluminum oxide powder is brought into contact with the surface of a titanium-base material and aluminum is diffused into the surface of the titanium-base material by a heat treatment to form an intermetallic compound such as Ti3Al and TiAl in the surface regions of the titanium-base material, so that the surface hardness is improved while preventing surface separation. A surface-hardened titanium-base material made in this method may provide a decoration article and a watchcase decoration article, which are less likely to be damaged and to invite metallic allergy.
(FR) L'invention porte sur un procédé de traitement de surface de matériaux à base de titane consistant à mettre en contact de la poudre d'un alliage titane/aluminium ou d'oxyde d'aluminium avec la surface d'un matériau à base de titane pour permettre la diffusion par traitement thermique de l'aluminium dans la surface du matériau à base de titane afin de former un composé intermétallique tel que le Ti3Al ou le TiAl à la surface dudit matériau, ce qui accroît la dureté de la surface tout en en empêchant le fractionnement. L'invention porte également sur un matériau à base de titane obtenu par ce procédé pouvant servir à la création d'un article décoratif notamment pour boîtier de montre, moins susceptible d'usure et de provoquer une allergie aux métaux.
Designated States: CN, JP, KR, US
European Patent Office (AT, BE, CH, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)
Also published as:
EP0863223US6270914JP3070957CN1201494KR1019990067448