EP1373593A2 - Verfahren und vorrichtung zum gasphasendiffusionsbeschichten von metallischen bauteilen - Google Patents
Verfahren und vorrichtung zum gasphasendiffusionsbeschichten von metallischen bauteilenInfo
- Publication number
- EP1373593A2 EP1373593A2 EP02711763A EP02711763A EP1373593A2 EP 1373593 A2 EP1373593 A2 EP 1373593A2 EP 02711763 A EP02711763 A EP 02711763A EP 02711763 A EP02711763 A EP 02711763A EP 1373593 A2 EP1373593 A2 EP 1373593A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- coating
- period
- concentration
- component surface
- metal
- 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
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
- C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
- C23C10/06—Solid state diffusion of only metal elements or silicon into metallic material surfaces using gases
- C23C10/16—Solid state diffusion of only metal elements or silicon into metallic material surfaces using gases more than one element being diffused in more than one step
-
- 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
- C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
- C23C10/02—Pretreatment of the material to be coated
-
- 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
- C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
- C23C10/06—Solid state diffusion of only metal elements or silicon into metallic material surfaces using gases
Definitions
- Diffusion layers of this type generally serve as hot gas corrosion and oxidation protection layers or as an adhesive base for thermal insulation layers.
- a nominal concentration of the metal halide on the component surface is assumed in a known method, which defines a defined for the formation of a diffusion layer with a layer thickness in the range from 50 to 100 ⁇ m and a coating metal content of 25 to 32% by weight in the component surface , reproducible coating time of 14 hours.
- Alternative diffusion layers with other layer thickness ranges and / or coating metal contents can lead to brushing times of e.g. Run for 20 hours. If the material is difficult to coat, e.g. a monocrystallized solidified Ni base alloy, a longer coating time is required under otherwise identical conditions.
- the problem on which the present invention is based is to create a method of the type described in the introduction with which diffusion layers with a defined layer thickness and a defined coating metal content by weight in the component surface can be produced as economically as possible, ie while saving coating time. Furthermore, a device device for gas phase diffusion coating of metallic components according to the aforementioned method.
- the solution to this problem with regard to the method according to the invention is characterized in that for the metal halide a first concentration lying above the nominal concentration over a first (coating) period and at least one at or over at least a second (coating) period the second concentration below the nominal concentration is set on the component surface, the first and the at least one second period being selected such that their sum is shorter than the coating duration with the nominal concentration.
- the high coating metal content on the component surface leads in the second period through diffusion processes to a higher coating metal content in the component depth and to a degradation on the component surface, which after the end of the second period leads to a diffusion layer with the desired coating metal content in% by weight in the component surface and desired layer thickness leads.
- the high, first concentration in the first period is generated by an oversupply of metal halide and is canceled in the second period by dilution (supply of inert gas or hydrogen).
- the metal halide can preferably contain F or Cl.
- Al and / or Cr and optionally further elements such as Si, Hf, Y can be provided as coating metal in order to protect the coated component surfaces against oxidation or corrosion.
- a diffusion layer with a layer thickness of 50 to 100 ⁇ m and a coating metal content of 25 to 32% by weight is formed in the component surface.
- a second concentration can be set to approximately zero in a second period, so that the layer thickness increases due to diffusion of the coating metal atoms already present in the component surface.
- the diffusion layer Before forming the diffusion layer, other elements such as Pt, Si, Y, Hf or mixtures of the type MCrAIY (with Ni, Co as M) as a slip or plasma-sprayed layer can also be applied to the component surface in order to achieve specific properties of the diffusion layer, e.g. Resistance to oxidation or ductility to further improve.
- other elements such as Pt, Si, Y, Hf or mixtures of the type MCrAIY (with Ni, Co as M) as a slip or plasma-sprayed layer can also be applied to the component surface in order to achieve specific properties of the diffusion layer, e.g. Resistance to oxidation or ductility to further improve.
- FIG. 1 shows an embodiment of a device for carrying out the method according to the invention for gas diffusion coating
- Fig. 2 is a diagram showing the AI content over the layer thickness at the end of the first period
- Fig. 3 is a diagram showing the AI content over the layer thickness at the end of the second period.
- reaction vessel 2 which is rotationally symmetrical in the present embodiment, a plurality of schematically illustrated components 3 of a gas turbine, such as e.g. Turbine blades, arranged with their surfaces 4 to be coated and kept suitable.
- the components 3 are aligned essentially radially.
- the reaction container 2 has a centrally arranged distributor device 5 with openings 6, shown enlarged in the drawing, which are distributed substantially uniformly over their height and around their circumference. Instead of the openings
- the turbine blades 3 are made of a nickel or cobalt-based alloy with an aluminum diffusion layer with an Al content on the surface of 25 to 32% by weight and a layer thickness of 60 to 90 ⁇ m for protection against hot gas oxidation be coated.
- an inert gas such as argon
- an inert gas is fed into the retort 1 via the feed line 10 for purging in order to make the retort 1 essentially free of 0 2 and H 2 0 in order to avoid oxidation.
- no gas is initially supplied to the reaction vessel 2 via the feed line 9.
- the retort 1 is supplied with hydrogen (H 2 ) via the feed line 10 and the reaction chamber 2 via the feed line 9 or the distributor device 5. From a temperature of 1000 ° C, the hydrogen supply to reaction chamber 2 is stopped.
- the reaction chamber 2 is supplied with hydrogen via the feed line 9 and the distributor device 5 at the beginning of the second period, as a result of which the concentration of metal halide on the surfaces 4 of the turbine blades 3 to be coated is significantly reduced. This takes place, on the one hand, by the dilution in the reaction container 2 and, on the other hand, in that the metal halide forming the coating gas reacts to form hydrogen halides due to the excess of hydrogen. These conditions are held for four hours during the second period. After the second period has ended, the retort 1 and the reaction space 2 are cooled to room temperature by supplying 1 m 3 / h of inert gas (argon) via the feed lines 10 and 9, respectively.
- inert gas argon
- the invention only requires a total of 10 hours to produce the diffusion layer with the desired layer parameters.
- an inert gas is supplied to the reaction chamber 2 via the feed line 9 and the distributor device 5 at the beginning of the second period to set the second concentration of the metal halide on the component surface 4 that is below the nominal concentration.
- an Al diffusion layer can contain Pt or Pd, in which case, for example, Pt with a layer thickness of, for example, 5 ⁇ m is first galvanically deposited on the component surface and optionally heat-treated. The method according to the invention is then carried out in the manner described above. Due to the great driving force of the method according to the invention due to the high Al concentration in the first coating period, Al can diffuse through the Pt layer into the component surface. In this way, a PtAI diffusion layer with a layer thickness of 70 ⁇ m can be produced, which has an Al content of approximately 24% by weight and a Pt content of approximately 21% by weight at a depth of 5 ⁇ m. and has an Al content of approximately 23% by weight and a Pt content of approximately 18% by weight at a depth of 15 ⁇ m and thus has an advantageous ratio between Al and Pt.
- Pt or Pd in which case, for example, Pt with a layer thickness of, for example, 5 ⁇ m is first galvanically deposited on the component surface and optionally heat
- the coating metal content in% by weight above the layer thickness after the end of the first period i.e. the coating with the first concentration above the nominal concentration is shown.
- the high driving force associated with the high concentration leads to an Al content of 38% in the surface of the component, which is above the desired Al content in the range from 25 to 32% by weight.
- the layer thickness S of the diffusion layer is only small after the end of the first period and is far below the desired layer thickness of 50 to 100 ⁇ m.
- the Al content over the layer thickness after the end of the second period i.e. at the end of the coating process. Due to the diffusion of the Al atoms into the component, the desired Al content of 28% by weight is established on the component surface.
- the distribution of AI is significantly more uniform and leads to an increase in the layer thickness down to the desired range of 50 to 100 ⁇ m.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Chemical Vapour Deposition (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10101070A DE10101070C1 (de) | 2001-01-11 | 2001-01-11 | Verfahren zum Gasphasendiffusionsbeschichten von metallischen Bauteilen |
| DE10101070 | 2001-01-11 | ||
| PCT/DE2002/000030 WO2002055754A2 (de) | 2001-01-11 | 2002-01-09 | Verfahren und vorrichtung zum gasphasendiffusionsbeschichten von metallischen bauteilen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1373593A2 true EP1373593A2 (de) | 2004-01-02 |
| EP1373593B1 EP1373593B1 (de) | 2009-10-21 |
Family
ID=7670286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02711763A Expired - Lifetime EP1373593B1 (de) | 2001-01-11 | 2002-01-09 | Verfahren und vorrichtung zum gasphasendiffusionsbeschichten von metallischen bauteilen |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US7294361B2 (de) |
| EP (1) | EP1373593B1 (de) |
| JP (1) | JP4060186B2 (de) |
| CA (1) | CA2434211C (de) |
| DE (2) | DE10101070C1 (de) |
| ES (1) | ES2335481T3 (de) |
| WO (1) | WO2002055754A2 (de) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10224632A1 (de) * | 2002-06-04 | 2003-12-24 | Mtu Aero Engines Gmbh | Verfahren zur Innenbeschichtung von Gasturbinenschaufeln |
| DE10258560A1 (de) * | 2002-12-14 | 2004-07-08 | Mtu Aero Engines Gmbh | Verfahren und Vorrichtung zum CVD-Beschichten von Werkstücken |
| US7026011B2 (en) † | 2003-02-04 | 2006-04-11 | General Electric Company | Aluminide coating of gas turbine engine blade |
| FR2853329B1 (fr) | 2003-04-02 | 2006-07-14 | Onera (Off Nat Aerospatiale) | Procede pour former sur un metal un revetement protecteur contenant de l'aluminium et du zirconium |
| DE102004002365A1 (de) * | 2004-01-15 | 2005-08-11 | Behr Gmbh & Co. Kg | Verfahren und Vorrichtung zum Behandeln metallischer Körper |
| DE102004034312A1 (de) * | 2004-07-15 | 2006-02-02 | Mtu Aero Engines Gmbh | Dichtungsanordnung und Verfahren zur Herstellung eines Dichtkörpers für eine Dichtungsanordnung |
| US20080182026A1 (en) * | 2007-01-31 | 2008-07-31 | Honeywell International, Inc. | Reactive element-modified aluminide coating for gas turbine airfoils |
| DE102008053540A1 (de) * | 2008-10-28 | 2010-04-29 | Mtu Aero Engines Gmbh | Hochtemperaturkorrosionsschutzschicht und Verfahren zur Herstellung |
| DE102010039233A1 (de) | 2010-08-12 | 2012-02-16 | Behr Gmbh & Co. Kg | Verfahren zur Herstellung eines Schichtwärmeübertragers |
| FR2992977B1 (fr) | 2012-07-03 | 2017-03-10 | Snecma | Procede et outillage pour le depot d'un revetement metallique en phase vapeur sur des pieces en super alliages |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4714624A (en) * | 1986-02-21 | 1987-12-22 | Textron/Avco Corp. | High temperature oxidation/corrosion resistant coatings |
| US5217757A (en) | 1986-11-03 | 1993-06-08 | United Technologies Corporation | Method for applying aluminide coatings to superalloys |
| US5071678A (en) | 1990-10-09 | 1991-12-10 | United Technologies Corporation | Process for applying gas phase diffusion aluminide coatings |
| GB2274253B (en) | 1993-01-14 | 1997-04-16 | Boc Group Plc | Gas separation apparatus |
| DE4340060C1 (de) * | 1993-11-24 | 1995-04-20 | Linde Ag | Verfahren zum Gasaufkohlen |
| JP3029546B2 (ja) | 1994-03-09 | 2000-04-04 | 株式会社荏原製作所 | クロム拡散浸透耐熱合金部材とその製法 |
| US6129991A (en) * | 1994-10-28 | 2000-10-10 | Howmet Research Corporation | Aluminide/MCrAlY coating system for superalloys |
| JP3390776B2 (ja) | 1995-03-20 | 2003-03-31 | 新次 辻 | アルミニウムの拡散希釈を利用した鋼の表面改質方法 |
| DE19730007C1 (de) * | 1997-07-12 | 1999-03-25 | Mtu Muenchen Gmbh | Verfahren und Vorrichtung zur Gasphasendiffusionsbeschichtung von Werkstücken aus warmfestem Material mit einem Beschichtungsmaterial |
| US6224941B1 (en) * | 1998-12-22 | 2001-05-01 | General Electric Company | Pulsed-vapor phase aluminide process for high temperature oxidation-resistant coating applications |
-
2001
- 2001-01-11 DE DE10101070A patent/DE10101070C1/de not_active Expired - Fee Related
-
2002
- 2002-01-09 DE DE50213942T patent/DE50213942D1/de not_active Expired - Lifetime
- 2002-01-09 WO PCT/DE2002/000030 patent/WO2002055754A2/de not_active Ceased
- 2002-01-09 EP EP02711763A patent/EP1373593B1/de not_active Expired - Lifetime
- 2002-01-09 JP JP2002556797A patent/JP4060186B2/ja not_active Expired - Fee Related
- 2002-01-09 CA CA2434211A patent/CA2434211C/en not_active Expired - Lifetime
- 2002-01-09 ES ES02711763T patent/ES2335481T3/es not_active Expired - Lifetime
- 2002-01-09 US US10/250,974 patent/US7294361B2/en not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| See references of WO02055754A2 * |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2004517216A (ja) | 2004-06-10 |
| CA2434211C (en) | 2010-06-08 |
| WO2002055754A2 (de) | 2002-07-18 |
| WO2002055754A3 (de) | 2003-10-30 |
| JP4060186B2 (ja) | 2008-03-12 |
| US20040112287A1 (en) | 2004-06-17 |
| ES2335481T3 (es) | 2010-03-29 |
| EP1373593B1 (de) | 2009-10-21 |
| DE50213942D1 (de) | 2009-12-03 |
| DE10101070C1 (de) | 2002-10-02 |
| CA2434211A1 (en) | 2002-07-18 |
| US7294361B2 (en) | 2007-11-13 |
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