EP0048083A1 - Surface treatment method of heat-resistant alloy - Google Patents
Surface treatment method of heat-resistant alloy Download PDFInfo
- Publication number
- EP0048083A1 EP0048083A1 EP19810303264 EP81303264A EP0048083A1 EP 0048083 A1 EP0048083 A1 EP 0048083A1 EP 19810303264 EP19810303264 EP 19810303264 EP 81303264 A EP81303264 A EP 81303264A EP 0048083 A1 EP0048083 A1 EP 0048083A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heat
- coating
- alloy
- liquid
- surface treatment
- 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
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000000956 alloy Substances 0.000 title claims abstract description 20
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 19
- 238000004381 surface treatment Methods 0.000 title claims abstract description 8
- 239000011248 coating agent Substances 0.000 claims abstract description 19
- 238000000576 coating method Methods 0.000 claims abstract description 19
- 239000007788 liquid Substances 0.000 claims abstract description 11
- 238000005260 corrosion Methods 0.000 claims abstract description 10
- 230000007797 corrosion Effects 0.000 claims abstract description 10
- 150000001875 compounds Chemical class 0.000 claims abstract description 5
- 238000005507 spraying Methods 0.000 claims abstract description 5
- 229910018487 Ni—Cr Inorganic materials 0.000 claims abstract description 4
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 4
- 238000009792 diffusion process Methods 0.000 claims abstract description 3
- 239000003779 heat-resistant material Substances 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims abstract description 3
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 3
- 230000035515 penetration Effects 0.000 claims abstract 2
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims 3
- 229910052751 metal Inorganic materials 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 3
- 239000000758 substrate Substances 0.000 description 9
- 239000007789 gas Substances 0.000 description 6
- 239000000446 fuel Substances 0.000 description 5
- 230000003647 oxidation Effects 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- 239000002131 composite material Substances 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 229910052593 corundum Inorganic materials 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 229910001845 yogo sapphire Inorganic materials 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 206010040844 Skin exfoliation Diseases 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 239000006255 coating slurry Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 238000007750 plasma spraying Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000013020 steam cleaning Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- C23C26/00—Coating not provided for in groups C23C2/00 - C23C24/00
-
- 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
- C23C10/28—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes
- C23C10/30—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes using a layer of powder or paste on the surface
Definitions
- This invention relates to a method of surface treatment of a member of heat-resistant alloy for use in turbines, blowers, boilers or the like to render it- resistant to high temperature oxidation as well as to high temperature corrosion.
- the present invention is directed to providing a method which overcomes the deficiences of the previous methods. Accordingly, in order to provide a member of heat-resistant alloy with high temperature oxidation resistance and high temperature corrosion resistance, the present invention provides a surface treatment method which is characterized by the steps of coating by spraying onto the surface of said member in the form of a substrate, a heat-resistant material of metals such as Ni and Cr or Ni-Cr alloys or their compounds as a first layer, then applying, as a second layer, a liquid coating containing metals such as AL, Si, Vr, Ts and the like or their alloys or compounds as the corrosion-resistant material by means of spray-coating, brush-coating or the like, and heat-treating the coated surface.
- a surface treatment method which is characterized by the steps of coating by spraying onto the surface of said member in the form of a substrate, a heat-resistant material of metals such as Ni and Cr or Ni-Cr alloys or their compounds as a first layer, then applying, as a
- the surface treatment method of the present invention provides the characterizing features as illustrated in Table 1 in comparison with the conventional methods.
- a substrate of Udimet 520 (by weight 19% Cr, 12% Co, 6% Mo, 3% Ti, 2% Al, 1% Fe, Ni-Bal), widely used as an ultra-alloy for the hot parts of a gas turbine, was treated in the following sequence:
- step (4) could be carried out using a mixture of fine. Al particles with Al 2 O 3 powder in a mixing ratio by weight of 80/20 or 50/50 or a mixture of Al with Si0 2 in a mixing ratio by weight of 80/20 or 50/50. Also step (6) could be carried out using a vacuum furnace in place of the hydrogen furnace.
- Udimet 520 has been treated by the method of the invention by way of example, similar excellent results can also be obtained when treating the surfaces of other substrates such Ni-based alloy, Co-based alloy and stainless steel.
- the coated surface of the substrate provided by the above described method had an extremely smooth and flat surface and Al and Si from the second layer sufficiently penetrated by diffusion into the first layer, thereby completely eliminating the fine pores of the first layer. Hence, the composite coating was. rendered wholly homogeneous.
- Table 2 illustrates the results of fly-ash errosion resistance test, corrosion resistance test, and practical application test using gas turbine blades, each test being applied to a member treated by a method in accordance with the present invention and a member treated by a conventional method.
- the composite coating produced by the method in accordance with the present invention had a better performance in comparison with that produced by the conventional method in the fly-ash errosion resistance test and the corrosion resistance test.
- the coated blade produced using the method of the present invention exhibited the tendency that the deposition amount of the fuel ash became smaller.
- a thermal inpact test comprising holding the testpiece at 1,100°C, for 15 minutes, then charging it into the water at 20°C. and repeating these procedures five times, the composite coating produced by the method of the present invention did not suffer peeling or cracking and had extremely good adhesion.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating By Spraying Or Casting (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
A method of surface treatment of a member made of heat-resistant alloy comprises spraying onto the surface of said member as a first layer a coating of a heat resistant material comprising for example a metal such as Ni or Cr or a Ni-Cr alloy or a compound thereof. A liquid coating containing a corrosion resistant material is then applied as a second layer on to the first layer. The member is then heat treated to .effect penetration by diffusion of one coating into the other.
Description
- This invention relates to a method of surface treatment of a member of heat-resistant alloy for use in turbines, blowers, boilers or the like to render it- resistant to high temperature oxidation as well as to high temperature corrosion.
- In industrial gas turbines using petroleum or natural gas as the fuel, gas temperature at the turbine inlet tends to become higher as the turbine efficiency is improved. On the other hand, as the available fuel supply has changed for the worse in recent years, the fuels used for the turbines have been diversified and the content of corrosive impurities in the fuels such as sulphur (S), sodium (Na), vanadium (V), and so forth has tended to increase. As a result, so-called "hot parts" such as the blades and burners of turbines, that are exposed to these high temperature gases, are subjected to extremely severe high temperature oxidation as well as high temperature corrosion.
- These hot parts have conventionally been made primarily of heat-resistant alloys. In particular turbine blades consist of Ni- and Co-based alloys called "ultra-alloys". However, since high temperature strength is generally a top priority requirement for these ultra-alloys, they have the drawback that their corrosion resistance and oxidation resistance are not satisfactory. Various attempts have therefore been made to provide these heat-resistant alloys with oxidation resistance and corrosion resistance and various surface treatment methods using for example chemical and physical techniques have been employed. However, none of these methods has been really satisfactory as regards efficiency and cost.
- The present invention is directed to providing a method which overcomes the deficiences of the previous methods. Accordingly, in order to provide a member of heat-resistant alloy with high temperature oxidation resistance and high temperature corrosion resistance, the present invention provides a surface treatment method which is characterized by the steps of coating by spraying onto the surface of said member in the form of a substrate, a heat-resistant material of metals such as Ni and Cr or Ni-Cr alloys or their compounds as a first layer, then applying, as a second layer, a liquid coating containing metals such as AL, Si, Vr, Ts and the like or their alloys or compounds as the corrosion-resistant material by means of spray-coating, brush-coating or the like, and heat-treating the coated surface.
- The surface treatment method of the present invention provides the characterizing features as illustrated in Table 1 in comparison with the conventional methods.
- The present invention will be now described in more detail by reference to an example in accordance therewith.
- A substrate of Udimet 520 (by weight 19% Cr, 12% Co, 6% Mo, 3% Ti, 2% Aℓ, 1% Fe, Ni-Bal), widely used as an ultra-alloy for the hot parts of a gas turbine, was treated in the following sequence:
- (1) After the surface of the substrate had been cleaned with an alkaline emulsion cleaning agent, steam cleaning was carried out using a Fluron type solvent. The surface was further blasted using an Aℓ2O3 blast.
- (2) A Ni-Cr (50/50 by weight) alloy was applied as a coating to form a first layer having a thickness of about 50η by plasma spraying.
- (3) The surface of the sprayed-on first layer was blasted using Aℓ 2O3 to remove any oxide film formed on its outermost surface.
- (4) The surface of the sprayed-on first layer was coated by spraying on a coating slurry formed by dispersing Aℓ. and Si02, each having a particle size of about 0.1 to 1η, in an organic carrier (alcohol, solvent naphtha, etc) to form a second layer.
- (5) After these treatments, the substrate was placed in an electric furnace and was held at 800C. (± 5°C) for 20 minutes to evaporate and remove the liquid. After being further held at 330°C (± 50C) for 15 minutes, the substrate was withdrawn from the furnace.
- (6) The substrate was held at 1,080°C for 4 hours inside a hydrogen furnace, was cooled in the furnace and was then withdrawn.
- Above mentioned step (4) could be carried out using a mixture of fine. Aℓ particles with Aℓ2O3 powder in a mixing ratio by weight of 80/20 or 50/50 or a mixture of Aℓ with Si02 in a mixing ratio by weight of 80/20 or 50/50. Also step (6) could be carried out using a vacuum furnace in place of the hydrogen furnace.
- Although in this example Udimet 520 has been treated by the method of the invention by way of example, similar excellent results can also be obtained when treating the surfaces of other substrates such Ni-based alloy, Co-based alloy and stainless steel.
- The coated surface of the substrate provided by the above described method had an extremely smooth and flat surface and Aℓ and Si from the second layer sufficiently penetrated by diffusion into the first layer, thereby completely eliminating the fine pores of the first layer. Hence, the composite coating was. rendered wholly homogeneous.
- In other words, since the melting point of Aℓ is 6600C., Aℓ was fused due to the heat-treatment and penetrated into the fine pores, thus presumably rendering the surface smooth and flat. Further, it was confirmed that a part of AL and Si reached and was diffused also into the substrate.
- Table 2 illustrates the results of fly-ash errosion resistance test, corrosion resistance test, and practical application test using gas turbine blades, each test being applied to a member treated by a method in accordance with the present invention and a member treated by a conventional method. The composite coating produced by the method in accordance with the present invention had a better performance in comparison with that produced by the conventional method in the fly-ash errosion resistance test and the corrosion resistance test. In the practical application test using gas turbine blades, too, the coated blade produced using the method of the present invention exhibited the tendency that the deposition amount of the fuel ash became smaller. In a thermal inpact test comprising holding the testpiece at 1,100°C, for 15 minutes, then charging it into the water at 20°C. and repeating these procedures five times, the composite coating produced by the method of the present invention did not suffer peeling or cracking and had extremely good adhesion.
Claims (10)
1. A method of surface treatment of a member made of heat-resistant alloy characterised by the steps of spraying onto the surface of said member a coating of a heat-resistant material, applying a liquid coating containing a corrosion-resistant material onto the sprayed-on coating and then heat treating said member to effect penetration by diffusion of one coating into the other.
2. A method according to claim 1, characterised in that said sprayed-on coating comprises Ni or Cr or a Ni-Cr alloy or a compound of Ni and/or Cr.
3. A method according to Claim 1 or Claim 2, characterised in that said liquid coating comprises a slurry.
4. A method according to any preceding claim, characterised in that said liquid coating contains at least one of the following, Aℓ, Si, Vr, Ts, or an alloy thereof or a compound thereof.
5. A method according to Claim 4, characterised in that the liquid coating comprises a slurry formed by dispersing Aℓ and Si02 in a liquid carrier.
6. A method according to Claim 5, characterised in that said Aℓ and Si02 have a particle size of about 0.1η to 1η.
7. A method according to Claim 4, characterised in that the liquid coating comprises a slurry formed by dispersing Aℓ and Aℓ 2O3 in a liquid carrier.
8. A method according to any preceding claim, characterised in that the heat treatment includes the step of holding the member at about 10800C for several hours.
9. A method according to Claim 8, wherein said step in the heat treatment is preceded by a heating step to evaporate the liquid, followed by a relatively short heat treatment at about 330°C.
10. A method of surface treatment of a member made of heat resistant alloy, substantially as hereinbefore described by way of example.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP128738/80 | 1980-09-17 | ||
| JP12873880A JPS5754282A (en) | 1980-09-17 | 1980-09-17 | Surface treatment of heat resistant alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0048083A1 true EP0048083A1 (en) | 1982-03-24 |
| EP0048083B1 EP0048083B1 (en) | 1986-03-05 |
Family
ID=14992227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19810303264 Expired EP0048083B1 (en) | 1980-09-17 | 1981-07-16 | Surface treatment method of heat-resistant alloy |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0048083B1 (en) |
| JP (1) | JPS5754282A (en) |
| CA (1) | CA1173305A (en) |
| DE (1) | DE3173970D1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999063126A1 (en) * | 1998-06-03 | 1999-12-09 | MTU MOTOREN- UND TURBINEN-UNION MüNCHEN GMBH | Method for producing an adhesive layer for a heat insulating layer |
| EP1088908A3 (en) * | 1999-10-01 | 2003-09-17 | General Electric Company | A method for smoothing the surface of a protective coating |
| WO2007067185A3 (en) * | 2004-12-13 | 2007-08-02 | Aeromet Technologies Inc | Turbine engine components with non-aluminide silicon-containing and chromium-containing protective coatings and methods of forming such non-aluminide protective coatings |
| US7901739B2 (en) | 2004-09-16 | 2011-03-08 | Mt Coatings, Llc | Gas turbine engine components with aluminide coatings and method of forming such aluminide coatings on gas turbine engine components |
| US9133718B2 (en) | 2004-12-13 | 2015-09-15 | Mt Coatings, Llc | Turbine engine components with non-aluminide silicon-containing and chromium-containing protective coatings and methods of forming such non-aluminide protective coatings |
| EP3492623A1 (en) * | 2017-12-01 | 2019-06-05 | General Electric Company | Method for reducing surface roughness |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58177458A (en) * | 1982-04-12 | 1983-10-18 | Sumitomo Metal Ind Ltd | Nickel and chromium alloy diffusion penetration treatment method |
| JPS63487A (en) * | 1986-06-19 | 1988-01-05 | Tookaro Kk | Heat resistance member having oxide film on coating of chromium-contained thermal spraying metal |
| US5789077A (en) | 1994-06-27 | 1998-08-04 | Ebara Corporation | Method of forming carbide-base composite coatings, the composite coatings formed by that method, and members having thermally sprayed chromium carbide coatings |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3837894A (en) * | 1972-05-22 | 1974-09-24 | Union Carbide Corp | Process for producing a corrosion resistant duplex coating |
| GB1439947A (en) * | 1972-05-30 | 1976-06-16 | Union Carbide Corp | Corrosion resistant coatings and process for making the same |
| US3989863A (en) * | 1975-07-09 | 1976-11-02 | The International Nickel Company, Inc. | Slurry coating process |
| GB2009251A (en) * | 1977-12-01 | 1979-06-13 | Rolls Royce | Aluminising nickel or cobalt based superalloys |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5635749B2 (en) * | 1973-01-23 | 1981-08-19 |
-
1980
- 1980-09-17 JP JP12873880A patent/JPS5754282A/en active Granted
-
1981
- 1981-07-16 EP EP19810303264 patent/EP0048083B1/en not_active Expired
- 1981-07-16 DE DE8181303264T patent/DE3173970D1/en not_active Expired
- 1981-08-07 CA CA000383402A patent/CA1173305A/en not_active Expired
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3837894A (en) * | 1972-05-22 | 1974-09-24 | Union Carbide Corp | Process for producing a corrosion resistant duplex coating |
| GB1439947A (en) * | 1972-05-30 | 1976-06-16 | Union Carbide Corp | Corrosion resistant coatings and process for making the same |
| US3989863A (en) * | 1975-07-09 | 1976-11-02 | The International Nickel Company, Inc. | Slurry coating process |
| GB2009251A (en) * | 1977-12-01 | 1979-06-13 | Rolls Royce | Aluminising nickel or cobalt based superalloys |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999063126A1 (en) * | 1998-06-03 | 1999-12-09 | MTU MOTOREN- UND TURBINEN-UNION MüNCHEN GMBH | Method for producing an adhesive layer for a heat insulating layer |
| US6709711B1 (en) | 1998-06-03 | 2004-03-23 | MTU MOTOREN-UND TURBINEN-UNION MüNCHEN GMBH | Method for producing an adhesive layer for a heat insulating layer |
| EP1088908A3 (en) * | 1999-10-01 | 2003-09-17 | General Electric Company | A method for smoothing the surface of a protective coating |
| US7901739B2 (en) | 2004-09-16 | 2011-03-08 | Mt Coatings, Llc | Gas turbine engine components with aluminide coatings and method of forming such aluminide coatings on gas turbine engine components |
| US8623461B2 (en) | 2004-09-16 | 2014-01-07 | Mt Coatings Llc | Metal components with silicon-containing protective coatings substantially free of chromium and methods of forming such protective coatings |
| WO2007067185A3 (en) * | 2004-12-13 | 2007-08-02 | Aeromet Technologies Inc | Turbine engine components with non-aluminide silicon-containing and chromium-containing protective coatings and methods of forming such non-aluminide protective coatings |
| US9133718B2 (en) | 2004-12-13 | 2015-09-15 | Mt Coatings, Llc | Turbine engine components with non-aluminide silicon-containing and chromium-containing protective coatings and methods of forming such non-aluminide protective coatings |
| EP3492623A1 (en) * | 2017-12-01 | 2019-06-05 | General Electric Company | Method for reducing surface roughness |
| CN109868447A (en) * | 2017-12-01 | 2019-06-11 | 通用电气公司 | For reducing the method for surface roughness |
| US11118268B2 (en) | 2017-12-01 | 2021-09-14 | General Electric Company | Method for reducing surface roughness |
Also Published As
| Publication number | Publication date |
|---|---|
| CA1173305A (en) | 1984-08-28 |
| JPS5754282A (en) | 1982-03-31 |
| EP0048083B1 (en) | 1986-03-05 |
| DE3173970D1 (en) | 1986-04-10 |
| JPH0132309B2 (en) | 1989-06-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Designated state(s): DE FR GB IT |
|
| 17P | Request for examination filed |
Effective date: 19820920 |
|
| ITF | It: translation for a ep patent filed | ||
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
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