EP0938940A1 - Procédé et appareil pour le traitement de surface de pièces en titane et en alliage de titane - Google Patents
Procédé et appareil pour le traitement de surface de pièces en titane et en alliage de titane Download PDFInfo
- Publication number
- EP0938940A1 EP0938940A1 EP98102510A EP98102510A EP0938940A1 EP 0938940 A1 EP0938940 A1 EP 0938940A1 EP 98102510 A EP98102510 A EP 98102510A EP 98102510 A EP98102510 A EP 98102510A EP 0938940 A1 EP0938940 A1 EP 0938940A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- article
- forming
- protective coating
- titanium
- alloys
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—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
- C23C—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
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/24—Nitriding
-
- C—CHEMISTRY; METALLURGY
- C23—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
- C23C—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
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/10—Oxidising
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/26—Anodisation of refractory metals or alloys based thereon
Definitions
- the present invention relates to a process for treating under a controlled atmosphere the surface of pieces or articles made of titanium and alloys thereof or similar metals.
- the articles are preferably formed through lost-wax casting, particularly for use in prosthetic dentistry, orthodontics and the like.
- the invention further relates to an apparatus for carrying out such process.
- titanium has peculiar properties such as the affinity with O 2 and H, and becomes easily oxidated at high temperature regardless of the O 2 partial pressure.
- all the operations required to obtain a finished article are accomplished under a neutral and controlled atmosphere in a single apparatus so as to obtain a finished piece that is protected by a strongly adhering film and has a fine appearence before being transferred to a normal atmosphere and then in the oral cavity environment.
- the piece is then subjected to anodic oxidation or nitriding in an ammonia atmosphere, which allows the properly forming of a protective coating of oxide or nitride having an adherence strength to the piece in the order of 1,400 kg/mm 2 .
- Such apparatus substantially comprises a sealed vessel 1 provided with a transparent cover so that all the operating steps can be visually checked and controlled, and provided with introflexed rubber gloves for manipulating the articles.
- the apparatus is further provided with a bottle of an inert gas and an associated pressure reducing valve; it is further provided with a vacuum pump and a Getter device 3 adapted to cause a quick and complete oxidation of the metal contained within the apparatus, thus removing all the residual O 2 molecules within the sealed vessel 1.
- the sealed vessel 1 further houses a high temperature cylinder 5 where the article is cast, a tank 7 containing a liquid bath (e.g. oil) in which the article can be quenched, and an arm 6 for removing the article from the cylinder 5 and dipping it into the oil bath of the tank 7 where it is quenched in absence of contaminants.
- a liquid bath e.g. oil
- a finishing station 9 (cooling area), a sandblasting station 11 and a pickling station 13.
- an additional (if required) station 15 for mechanically polishing the article there are contained an additional (if required) station 15 for mechanically polishing the article, a station 17 for (micro) welding operations and a station (not shown) for spot-welding operations. All the above mentioned operations of polishing and welding are carried out in the neutral atmosphere.
- the vessel 1 further contains an anodic oxidation device 19 an a device 21 for nitriding the article in an ammonia atmosphere.
- an oxide coating or a nitride coating is formed on the surface of the article 23 or 25, such a coating having an adhesion force (cohesion) comprised between 1,000 and 2,000 kg/mm 2 , and preferably in the order of 1,400 kg/mm 2 .
- the article 23 (or 25) can be exposed to the atmosphere or to contaminants without the risk of being subjected to further undesided chemical or chemical-physical reactions, either on the surface or in the body of the article.
- Such qualities are for example a pink coloring when the article has to blend with the gengival mucosa or a milk coloring when the orthodontic devices are located on the enamel of natural dental crowns.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Electrochemistry (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
- Apparatus For Disinfection Or Sterilisation (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES98102510T ES2205290T3 (es) | 1998-02-13 | 1998-02-13 | Proceso para tratar la superficie de articulos hechos de titanio y sus aleaciones. |
DE69817320T DE69817320T2 (de) | 1998-02-13 | 1998-02-13 | Verfahren zur Oberflächenbehandlung von Werkstücken aus Titan und Titanlegierungen |
EP19980102510 EP0938940B1 (fr) | 1998-02-13 | 1998-02-13 | Procédé pour le traitement de surface de pièces en titane et en alliage de titane |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19980102510 EP0938940B1 (fr) | 1998-02-13 | 1998-02-13 | Procédé pour le traitement de surface de pièces en titane et en alliage de titane |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0938940A1 true EP0938940A1 (fr) | 1999-09-01 |
EP0938940B1 EP0938940B1 (fr) | 2003-08-20 |
Family
ID=8231401
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19980102510 Expired - Lifetime EP0938940B1 (fr) | 1998-02-13 | 1998-02-13 | Procédé pour le traitement de surface de pièces en titane et en alliage de titane |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0938940B1 (fr) |
DE (1) | DE69817320T2 (fr) |
ES (1) | ES2205290T3 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111455427A (zh) * | 2020-05-26 | 2020-07-28 | 东莞金稞电子科技有限公司 | 一种铝合金表面砂面和高光面渐变处理工艺 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB732298A (en) * | 1952-05-03 | 1955-06-22 | Nat Lead Co | Apparatus for casting refractory metals |
GB2244020A (en) * | 1990-05-18 | 1991-11-20 | G C Dental Ind Corp | Casting of dental metals |
GB2244019A (en) * | 1990-05-18 | 1991-11-20 | G C Dental Ind Corp | Casting of dental metals |
FR2695581A1 (fr) * | 1992-09-16 | 1994-03-18 | Saed Manfredi Spa | Procédé de travail de matériaux métalliques en atmosphère contrôlée. |
-
1998
- 1998-02-13 EP EP19980102510 patent/EP0938940B1/fr not_active Expired - Lifetime
- 1998-02-13 DE DE69817320T patent/DE69817320T2/de not_active Expired - Fee Related
- 1998-02-13 ES ES98102510T patent/ES2205290T3/es not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB732298A (en) * | 1952-05-03 | 1955-06-22 | Nat Lead Co | Apparatus for casting refractory metals |
GB2244020A (en) * | 1990-05-18 | 1991-11-20 | G C Dental Ind Corp | Casting of dental metals |
GB2244019A (en) * | 1990-05-18 | 1991-11-20 | G C Dental Ind Corp | Casting of dental metals |
FR2695581A1 (fr) * | 1992-09-16 | 1994-03-18 | Saed Manfredi Spa | Procédé de travail de matériaux métalliques en atmosphère contrôlée. |
Non-Patent Citations (2)
Title |
---|
"ASM HANDBOOK, 10TH EDITION, VOL 5, SURFACE ENGINEERING", 1994, ASM INTERNATIONAL, METALS PARK, OHIO, US, XP002071976 * |
M.J.DONACHIE: "TITANIUM - A TECHNICAL GUIDE", 1988, ASM, METALS PARK, OHIO, US, XP002071975 * |
Also Published As
Publication number | Publication date |
---|---|
DE69817320D1 (de) | 2003-09-25 |
ES2205290T3 (es) | 2004-05-01 |
EP0938940B1 (fr) | 2003-08-20 |
DE69817320T2 (de) | 2004-06-17 |
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