US5154885A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Highly corrosion and/or oxidation-resistant protective coating containing rhenium
Assignee: Siemens AG
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Filing: 1990-08-10
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Granted: 1992-10-13
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Expires: 2010-08-10
Abstract
Abstract A protective coating for metal components formed of nickel or cobalt-based superalloys essentially consists of the following constituents (in percentages by weight): 1 to 20% rhenium, 22 to 50% chromium, 0 to 15% aluminum, the share of chromium and aluminum taken together being at least 25% and at most 53%, 0.3 to 2% in total of at least one reactive element from the group consisting of the rare earths, and 0 to 3% silicon, impurities, as well as the following elective components: 0 to 5% hafnium, 0 to 12% tungsten, 0 to 10% manganese, 0 to 15% tantalum, 0 to 5% titanium, 0 to 4% niobium, and 0 to 2% zirconium, the total share of the elective components being from 0 to a maximum of 15%, and a remainder primarily being at least one of the elements iron, nickel, and cobalt.
Inventors
- 👤 Norbert Czech
- 👤 Friedhelm Schmitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:19
CPC Classifications
C; C22; C22C; C22C19/00; C23; C23C; C23C30/00; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
135 words
A protective coating for metal components essentially consisting of the following constituents (in percentages by weight): 1 to 20% rhenium, 22 to 50% chromium, 0 to 15% aluminum, the share of chromium and aluminum taken together being at least 25% and at most 53%, 0.3 to 2% in total of at least one reactive element from the group consisting of the rare earths, and 0 to 3% silicon, impurities, as well as the following elective components: 0 to 5% hafnium, 0 to 12% tungsten, 0 to 10% manganese, 0 to 15% tantalum, 0 to 5% titanium, 0 to 4% niobium, and 0 to 2% zirconium, the total share of the elective components being from 0 to a maximum of 15%, and a remainder primarily being at least one of the elements iron, nickel, and cobalt.
Claim 2
Dependent Claim
135 words
A protective coating for metal components essentially consisting of the following constituents (in percentages by weight): 1 to 20% rhenium, 22 to 50% chromium, 0 to 15% aluminum, the share of chromium and aluminum taken together being at least 25% and at most 53%, 0.3 to 2% in total of at least one reactive element from the group consisting of the rare earths, and 0 to 3% silicon, impurities, as well as the following elective components: 0 to 5% hafnium, 0 to 12% tungsten, 0 to 10% manganese, 0 to 15% tantalum, 0 to 5% titanium, 0 to 4% niobium, and 0 to 2% zirconium, the total share of the elective components being from 0 to a maximum of 15%, and a remainder primarily being at least one of the elements iron, nickel, and cobalt.
Claim 3
Dependent Claim
15 words
The protective coating according to claim 1, wherein the rhenium share is 1 to 15%.
Claim 4
Dependent Claim
15 words
The protective coating according to claim 2, wherein the rhenium share is 4 to 10%.
Claim 5
Dependent Claim
14 words
The protective coating according to claim 3, wherein the rhenium share is approximately 7%.
Claim 6
Dependent Claim
16 words
The protective coating according to claim 1, wherein the aluminum share is from 7 to 9%.
Claim 7
Dependent Claim
15 words
The protective coating according to claim 1, wherein the silicon share is 1 to 2%.
Claim 8
Dependent Claim
15 words
The protective coating according to claim 1, wherein the chromium share is 28 to 32%.
Claim 9
Dependent Claim
15 words
The protective coating according to claim 1, wherein the nickel share is 25 to 35%.
Claim 10
Dependent Claim
15 words
The protective coating according to claim 1, wherein the cobalt share is 25 to 35%.
Claim 11
Dependent Claim
98 words
A protective coating for metal components, essentially consisting of the following constituents (in percentage by weight): 1 to 15% rhenium, 25 to 35% nickel, 28 to 32% chromium, 7 to 9% aluminum, 1 to 3% silicon, 0.3 to 2% yttrium, impurities, as well as the following elective components: 0 to 5% hafnium, 0 to 12% tungsten, 0 to 10% manganese, 0 to 15% tantalum, 0 to 5% titanium, 0 to 4% niobium, and 0 to 2% zirconium, the total share of the elective components being from 0 to a maximum of 15%, and a remainder being primarily cobalt.
Claim 12
Dependent Claim
98 words
A protective coating for metal components, essentially consisting of the following constituents (in percentage by weight): 1 to 15% rhenium, 25 to 35% nickel, 28 to 32% chromium, 7 to 9% aluminum, 1 to 3% silicon, 0.3 to 2% yttrium, impurities, as well as the following elective components: 0 to 5% hafnium, 0 to 12% tungsten, 0 to 10% manganese, 0 to 15% tantalum, 0 to 5% titanium, 0 to 4% niobium, and 0 to 2% zirconium, the total share of the elective components being from 0 to a maximum of 15%, and a remainder being primarily cobalt.
Claim 13
Dependent Claim
16 words
The protective coating according to claim 10, wherein the rhenium share is from 4 to 10%.
Claim 14
Dependent Claim
14 words
The protective coating according to claim 10, wherein the nickel share is approximately 30%.
Claim 15
Dependent Claim
14 words
The protective coating according to claim 10, wherein the chromium share is approximately 30%.
Claim 16
Dependent Claim
14 words
The protective coating according to claim 10, wherein the aluminum share is approximately 8%.
Claim 17
Dependent Claim
14 words
The protective coating according to claim 10, wherein the silicon share is approximately 1.5%.
Claim 18
Dependent Claim
14 words
The protective coating according to claim 10, wherein the yttrium share is approximately 0.6%.
Claim 19
Dependent Claim
112 words
A protective coating for metal components, essentially consisting of the following constituents (in percentage by weight): 1 to 15% rhenium, 22 to 26% chromium, 9 to 15% aluminum, 0.3 to 2% of at least one reactive element selected from the group consisting of rare earth elements, 0 to 30% cobalt, 0 to 3% silicon, impurities, as well as the following elective components: 0 to 5% hafnium, 0 to 12% tungsten, 0 to 10% manganese, 0 to 15% tantalum, 0 to 5% titanium, 0 to 4% niobium, and 0 to 2% zirconium, the total share of the elective components being from 0 to a maximum of 15%, and a remainder being primarily nickel.
Claim 20
Dependent Claim
112 words
A protective coating for metal components, essentially consisting of the following constituents (in percentage by weight): 1 to 15% rhenium, 22 to 26% chromium, 9 to 15% aluminum, 0.3 to 2% of at least one reactive element selected from the group consisting of rare earth elements, 0 to 30% cobalt, 0 to 3% silicon, impurities, as well as the following elective components: 0 to 5% hafnium, 0 to 12% tungsten, 0 to 10% manganese, 0 to 15% tantalum, 0 to 5% titanium, 0 to 4% niobium, and 0 to 2% zirconium, the total share of the elective components being from 0 to a maximum of 15%, and a remainder being primarily nickel.
Claim 21
Dependent Claim
16 words
The protective coating according to claim 17, wherein the rhenium share is from 4 to 10%.
Claim 22
Dependent Claim
18 words
The protective coating according to claim 17, wherein the aluminum share is from approximately 10% to approximately 13%.
Claim 23
Dependent Claim
23 words
The protective coating according to claim 17, wherein the one reactive element selected from the group consisting of rare earth elements is yttrium.
Claim 24
Dependent Claim
16 words
The protective coating according to claim 17, wherein the cobalt share is from 0 to 15%.
Claim 25
Dependent Claim
16 words
The protective coating according to claim 17, wherein the silicon share is from 1 to 2%.
Claim 26
Dependent Claim
108 words
A protective coating for metal components, essentially consisting of the following constituents (in percentage by weight): 1 to 15% rhenium, 25 to 50% chromium, 0 to 3% aluminum, 0.3 to 2% yttrium, 0.3 to 3% silicon, impurities, as well as the following elective components: 0 to 5% hafnium, 0 to 12% tungsten, 0 to 10% manganese, 0 to 15% tantalum, 0 to 5% titanium, 0 to 4% niobium and 0 to 2% zirconium, the total share of the elective components being from 0 to a maximum of 15%, and a remainder primarily being at least one of the elements of the group consisting of iron, nickel and cobalt.
Claim 27
Dependent Claim
108 words
A protective coating for metal components, essentially consisting of the following constituents (in percentage by weight): 1 to 15% rhenium, 25 to 50% chromium, 0 to 3% aluminum, 0.3 to 2% yttrium, 0.3 to 3% silicon, impurities, as well as the following elective components: 0 to 5% hafnium, 0 to 12% tungsten, 0 to 10% manganese, 0 to 15% tantalum, 0 to 5% titanium, 0 to 4% niobium and 0 to 2% zirconium, the total share of the elective components being from 0 to a maximum of 15%, and a remainder primarily being at least one of the elements of the group consisting of iron, nickel and cobalt.
Claim 28
Dependent Claim
16 words
The protective coating according to claim 23, wherein the rhenium share is from 4 to 10%.
Claim 29
Dependent Claim
16 words
The protective coating according to claim 23, wherein the chromium share is from 35 to 45%.
Claim 30
Dependent Claim
16 words
The protective coating according to claim 23, wherein the aluminum share is from 0 to 1%.
Claim 31
Dependent Claim
14 words
The protective coating according to claim 23, wherein the yttrium share is approximately 0.6%.
Claim 32
Dependent Claim
16 words
The protective coating according to claim 23, wherein the silicon share is from 1 to 2%.
References Cited (Backward Citations)
DE194392C
Cited
DE1758010A1
Cited
DE2132022A1
Cited
DE2355674A1
Cited
US3928026A
Cited
DE2526683A1
Cited
US4034142A
Cited
US4005989A
Cited
FR2378869A1
Cited
US4764225A
Cited
FR2463192A1
Cited
US4451299A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-10-13 | 1996-04-13 | 1996-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-10-13 | 2000-04-13 | 2000-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-10-13 | 2004-04-13 | 2004-10-13 | $7700.00 | Window Closed / Lapsed |