GB2036793A - Nickel or Nickel-Cobalt Base Alloys with Improved Corrosion Resistance - Google Patents
Nickel or Nickel-Cobalt Base Alloys with Improved Corrosion Resistance Download PDFInfo
- Publication number
- GB2036793A GB2036793A GB7846979A GB7846979A GB2036793A GB 2036793 A GB2036793 A GB 2036793A GB 7846979 A GB7846979 A GB 7846979A GB 7846979 A GB7846979 A GB 7846979A GB 2036793 A GB2036793 A GB 2036793A
- Authority
- GB
- United Kingdom
- Prior art keywords
- alloy
- cerium
- nickel
- component
- thorium
- 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
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 32
- 239000000956 alloy Substances 0.000 title claims abstract description 32
- 238000005260 corrosion Methods 0.000 title claims abstract description 15
- 230000007797 corrosion Effects 0.000 title claims abstract description 15
- 229910052759 nickel Inorganic materials 0.000 title claims abstract description 15
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title claims description 28
- QXZUUHYBWMWJHK-UHFFFAOYSA-N [Co].[Ni] Chemical compound [Co].[Ni] QXZUUHYBWMWJHK-UHFFFAOYSA-N 0.000 title 1
- 229910052684 Cerium Inorganic materials 0.000 claims abstract description 21
- 229910052751 metal Inorganic materials 0.000 claims abstract description 21
- 239000002184 metal Substances 0.000 claims abstract description 21
- 239000000843 powder Substances 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 14
- 229910052776 Thorium Inorganic materials 0.000 claims abstract description 13
- 229910052746 lanthanum Inorganic materials 0.000 claims abstract description 13
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 13
- 229910052727 yttrium Inorganic materials 0.000 claims abstract description 13
- 239000011248 coating agent Substances 0.000 claims abstract description 10
- 238000000576 coating method Methods 0.000 claims abstract description 10
- 239000007788 liquid Substances 0.000 claims abstract description 10
- 230000002708 enhancing effect Effects 0.000 claims abstract description 5
- 239000010409 thin film Substances 0.000 claims abstract description 3
- 238000010438 heat treatment Methods 0.000 claims abstract 2
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 claims description 19
- ZSLUVFAKFWKJRC-IGMARMGPSA-N 232Th Chemical compound [232Th] ZSLUVFAKFWKJRC-IGMARMGPSA-N 0.000 claims description 12
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 12
- 239000000470 constituent Substances 0.000 claims description 12
- 239000007789 gas Substances 0.000 claims description 12
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 claims description 12
- 239000011777 magnesium Substances 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 12
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 claims description 12
- 239000011651 chromium Substances 0.000 claims description 11
- 239000010408 film Substances 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- 229910000531 Co alloy Inorganic materials 0.000 claims description 4
- 229910000990 Ni alloy Inorganic materials 0.000 claims description 4
- 238000005219 brazing Methods 0.000 claims description 4
- 239000013590 bulk material Substances 0.000 claims description 4
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 229910052796 boron Inorganic materials 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 3
- 229910052721 tungsten Inorganic materials 0.000 claims description 3
- 239000010937 tungsten Substances 0.000 claims description 3
- 230000001680 brushing effect Effects 0.000 claims description 2
- 229920002678 cellulose Polymers 0.000 claims description 2
- 239000001913 cellulose Substances 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 238000007598 dipping method Methods 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 150000002739 metals Chemical class 0.000 claims description 2
- 238000004901 spalling Methods 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 229910017052 cobalt Inorganic materials 0.000 claims 1
- 239000010941 cobalt Substances 0.000 claims 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
The invention enhances the corrosion resistance of Ni or Ni/Co based alloys by the addition of Th, Y, Ce, La or Mg in an amount not exceeding 1.0%, preferably 0.1%. The preferred addition is 0.03% Ce. In one form of the invention is a bulk alloy. In another form, the invention provides a method of enhancing the corrosion resistance of a metal component (particularly but not exclusively an aircraft gas turbine blade) by coating the component with a Ni or Ni/Co based metal powder including the above addition, and heating to fuse the powder into a thin film on the component, The powder is suspended in a liquid carrier for coating.
Description
SPECIFICATION
Corrosion Resistant Alloy, and Method of
Enhancing Corrosion Resistance Using the
Alloy
This invention relates to the resistance to corrosion of nickel and nickel/cobalt based alloys, and is of particular but not exclusive relevance to gas turbine blades using such alloys.
It is known to attempt to enhance the corrosion resistance of gas turbine blades, particularly after repair, by providing the blade with a thin coating of alloy. In one known process, the blade is sprayed with a liquid vehicle containing metal powder and is then heated in a furnace under vacuum to drive off the liquid vehicle and to fuse the metal powder into a thin alloy film. The metal powder may for example be brazing powder sold by Dewrance Metals Ltd.
under the name "CM.60" and having the composition Cr 19.0%, Si 10.0%, C 0. 15% max,
Ni balance.
It has been found that such layers eventually fail, especially in the environment of an aircraft gas turbine. The thin alloy film tends to spall revealing an area of the under-lying alloy, and corrosion which starts in this area can advance under the remaining thin film causing further spalling. An object of the present invention is to improve the adherence of the film to the underlying component and thus lengthen the life of the component.
In accordance with one aspect of the present invention, defined in claim 6 hereinafter, this is achieved by including in the metal powder coated onto the blade or other article between 0.003% and 1.0%, preferably between 0.003% and 0.1%, of thorium, yttrium, lanthanum, cerium or magnesium. A particularly preferred addition is 0.03% cerium.
From another aspect as defined in claim 1 hereinafter, the invention provides a novel alloy, useful also as a bulk material, by the inclusion in a
Ni or Ni/Co based alloy of between 0.003% and 1.0%, preferably between 0.003% and 0.1%, of thorium, yttrium, lanthanum, cerium or magnesium. Again, cerium at 0.03% is particularly preferred.
Examples of the invention will now be described.
A preferred form of the invention relates to aircraft gas turbine blades, for example blades in which cracks have been repaired by brazing or welding followed by grinding to restore the desired profile. In accordance with this example of the invention, such blades are then coated with a liquid carrier containing a metal powder mixture having the composition given in Table I, II or Ill below. The carrier is suitably aqueous with an agent such as cellulose to aid adhesion. The coating is preferably applied by spraying; alternatively brushing or dipping may be used.
The coated blades are then placed under vacuum in a furnace and heated to a temperature (typically 1 1001 2000C) and for a time sufficient to drive off the carrier and cause the metal constituents to fuse into a thin alloy coating bonded to the blades. The blades could alternatively be placed in an atmosphere of pure dry hydrogen or non-reactive gases.
Table I
Constituent wt %
Ni Balance
Cr 19.0
Si 10.0
C 0.15 max
Ce 0.03
Table II
Constituent wt % Ni Balance
Cr 11.5
Si 3.25
B 2.5
Fe 3.4
C 0.6
W 16.0
Co 2.5
Ce 0.03
Table Ill
Constituent wt % Ni Balance
Cr 19.0
Si 2.5
B 1.5
C 0.5
W 9.0
Co 50.0
Ce 0.03
In another form of the invention, the constituents given in Table I, II or Ill above are alloyed together as a bulk material.
The cerium may be replaced by thorium, yttrium, lanthanum or magnesium. It is believed that a concentration of about 0.03% gives the optimum improvement in adhesion but up to .1.0% is considered to yield a useful result.
Claims
1. In a nickel or nickel/cobalt based alloy, the improvement comprising the inclusion of between 0.003% and 1.0% of thorium, yttrium, lanthanum, cerium or magnesium.
2. The alloy of claim 1, in which the other elements present are one or more of chromium, silicon, boron, iron, carbon and tungsten.
3. The alloy of claim 1 or claim 2, in which the thorium, yttrium, lanthanum, cerium or magnesium does not exceed 0.1%.
4. The alloy of claim 2, in which cerium is present at substantially 0.03%.
5. An alloy having substantially the constitution listed in Table I, Table II or Table Ill hereinbefore.
6. A method of enhancing the corrosion resistance of a metal component, comprising coating the component with a liquid vehicle
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (14)
1. In a nickel or nickel/cobalt based alloy, the improvement comprising the inclusion of between 0.003% and 1.0% of thorium, yttrium, lanthanum, cerium or magnesium.
2. The alloy of claim 1, in which the other elements present are one or more of chromium, silicon, boron, iron, carbon and tungsten.
3. The alloy of claim 1 or claim 2, in which the thorium, yttrium, lanthanum, cerium or magnesium does not exceed 0.1%.
4. The alloy of claim 2, in which cerium is present at substantially 0.03%.
5. An alloy having substantially the constitution listed in Table I, Table II or Table Ill hereinbefore.
6. A method of enhancing the corrosion resistance of a metal component, comprising coating the component with a liquid vehicle containing a metal powder mixture, and heating the component to drive off the liquid vehicle and cause the metal constituents to fuse to form a thin alloy layer bonded to the component; and in which the metal powder mixture is a nickel or nickel/cobalt based mixture containing between 0.003% and 1.0% thorium, yttrium, lanthanum, cerium, or magnesium.
7. A method according to claim 6, in which the other constituents of the mixture are one or more of chromium, silicon, boron, carbon, and tungsten.
8. A method according to claim 6 or claim 7, in which the thorium, yttrium, lanthanum, cerium or magnesium does not exceed 0.1%.
9. A method according to claim 8, in which cerium is present in the powder mixture at substantially 0.03%.
1 0. A method according to claim 9, in which the powder mixture has substantially the constitution listed in Table I, Table
II or Table Ill hereinbefore.
1 A method according to any of claims 6 to 10, in which the component is coated by spraying.
12. A method according to any of claims 6 to 11, in which the component is heated in a furnace under vacuum or an atmosphere of pure dry hydrogen.
13. A method according to any of claims 6 to 12, in which the component is a gas turbine blade.
14. A gas turbine blade treated in accordance with claim 13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7846979A GB2036793B (en) | 1978-12-02 | 1978-12-02 | Nickl or nickelcobalt base alloys with corrosion resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7846979A GB2036793B (en) | 1978-12-02 | 1978-12-02 | Nickl or nickelcobalt base alloys with corrosion resistance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2036793A true GB2036793A (en) | 1980-07-02 |
| GB2036793B GB2036793B (en) | 1983-11-16 |
Family
ID=10501492
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7846979A Expired GB2036793B (en) | 1978-12-02 | 1978-12-02 | Nickl or nickelcobalt base alloys with corrosion resistance |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2036793B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4735771A (en) * | 1986-12-03 | 1988-04-05 | Chrysler Motors Corporation | Method of preparing oxidation resistant iron base alloy compositions |
| WO1989009843A1 (en) * | 1988-04-04 | 1989-10-19 | Chrysler Motors Corporation | Oxidation resistant iron base alloy compositions |
| US4891183A (en) * | 1986-12-03 | 1990-01-02 | Chrysler Motors Corporation | Method of preparing alloy compositions |
| EP0400683A1 (en) * | 1989-06-02 | 1990-12-05 | Sugitani Kinzoku Kogyo Kabushiki Kaisha | Powdered metal spray coating material, process for producing the same and the use thereof |
| US4999158A (en) * | 1986-12-03 | 1991-03-12 | Chrysler Corporation | Oxidation resistant iron base alloy compositions |
-
1978
- 1978-12-02 GB GB7846979A patent/GB2036793B/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4735771A (en) * | 1986-12-03 | 1988-04-05 | Chrysler Motors Corporation | Method of preparing oxidation resistant iron base alloy compositions |
| US4891183A (en) * | 1986-12-03 | 1990-01-02 | Chrysler Motors Corporation | Method of preparing alloy compositions |
| US4999158A (en) * | 1986-12-03 | 1991-03-12 | Chrysler Corporation | Oxidation resistant iron base alloy compositions |
| WO1989009843A1 (en) * | 1988-04-04 | 1989-10-19 | Chrysler Motors Corporation | Oxidation resistant iron base alloy compositions |
| EP0400683A1 (en) * | 1989-06-02 | 1990-12-05 | Sugitani Kinzoku Kogyo Kabushiki Kaisha | Powdered metal spray coating material, process for producing the same and the use thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2036793B (en) | 1983-11-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3880709B2 (en) | Low activity aluminum compound topical coating and method for producing the same | |
| TW574395B (en) | A method of providing wear-resistant coatings | |
| US3542530A (en) | Nickel or cobalt base with a coating containing iron chromium and aluminum | |
| US4313760A (en) | Superalloy coating composition | |
| EP0024802B1 (en) | A method of forming a corrosion resistant coating on a metal article | |
| US6387527B1 (en) | Method of applying a bond coating and a thermal barrier coating on a metal substrate, and related articles | |
| US4275124A (en) | Carbon bearing MCrAlY coating | |
| US4447503A (en) | Superalloy coating composition with high temperature oxidation resistance | |
| CA1117828A (en) | Process for producing elevated temperature corrosion resistant metal articles | |
| US3961098A (en) | Coated article and method and material of coating | |
| US3955935A (en) | Ductile corrosion resistant chromium-aluminum coating on superalloy substrate and method of forming | |
| US4275090A (en) | Process for carbon bearing MCrAlY coating | |
| US5040718A (en) | Method of repairing damages in superalloys | |
| US4910098A (en) | High temperature metal alloy mixtures for filling holes and repairing damages in superalloy bodies | |
| US4615864A (en) | Superalloy coating composition with oxidation and/or sulfidation resistance | |
| US5104293A (en) | Method for applying abrasive layers to blade surfaces | |
| US2763921A (en) | Corrosion and impact resistant article and method of making same | |
| JPS6136061B2 (en) | ||
| US3598638A (en) | Diffusion metallic coating method | |
| JPH0336900B2 (en) | ||
| JPH07507839A (en) | Composite aluminide-silicide coating | |
| US3957454A (en) | Coated article | |
| JP2002504628A (en) | Method of making corrosion resistant and oxidized slurry layer | |
| GB2108534A (en) | Forming braze-bonded abrasive turbine blade tip | |
| JPH0641625B2 (en) | Method for providing thermal spray composite powder and toughness and corrosion resistant coating |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |