US4639280A
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Monocrystalline alloy with a nickel matrix basis
Assignee: TECPHY ELYSEES LA A CORP OF FRANCE
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Filing: 1984-12-10
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Granted: 1987-01-27
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Expires: 2004-12-10
Abstract
Abstract A monocrystalline alloy with a high resistance to creep having a nickel base matrix, with a density of the order of 8.5 and having a percentage, by weight, composition as follows: Co 5 to 8%-Cr 6.5 to 10%-Mo 0.5 to 2.5%-W 5 to 9%-Ta 6 to 9%-Al 4.5 to 5.8%-Ti 1 to 2%-Nb 0 to 1.5%-C, Zr, and B each less than 100 ppm-Ni remainder to 100%. Furthermore, the summation Ta+Mo+1/2 W lies between 11.5% and 13.5% by weight, the atomic sum Ti+Al+Ta+Nb lies between 15.5% and 17%, the atomic sum Ta+Nb+Mo+1/2 W lies between 4% and 5.5%, the atomic sum Ti+Al+Ta+Nb+Mo+1/2 W lies between 17.5% and 19% and the atomic sum Ti+Al lies between 12.8% and 14.5%.
Inventors
- 👤 Allan Fredholm
- 👤 James H. Davidson
- 👤 Tasadduq Khan
- 👤 Jean-Mare C. F. Theret
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:37
CPC Classifications
C; C30; C30B; C30B11/00; C30B29/00; C30B29/10; C30B29/52; C30B33/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
147 words
Monocrystalline alloy with a nickel base matrix having a high creep resistance, having a density of the order of 8.6% and consisting essentially of the following composition: ______________________________________
Co 5 to 8%
Cr 6.5 to 10%
Mo 0.5 to 2.5%
W 5 to 9%
Ta 6 to 9%
Al 4.5 to 5.8%
Ti 1 to 2%
Nb 0 to 1.5%
C,Zr,B each less than 100 ppm
Ni remainder to 100%
______________________________________ the percentages being given by weight, and the following criteria being observed: the summation of the percentages by weight of Ta+Mo+1/2W lies between 11.5% and 13.5%; the summation of Ti+Al+Ta+Nb in atomic percentages lies between 15.5 and 17%; the summation of the atomic percentages of Ta+Nb+Mo+1/2W lies between 4 and 5.5%; the summation of the atomic percentages Ti+Al+Ta+Nb+Mo+1/2W lies between 17.5 and 19%; and the summation of the atomic percentages Ti+Al lies between 12.8% and 14.5%.
Claim 2
Dependent Claim
147 words
Monocrystalline alloy with a nickel base matrix having a high creep resistance, having a density of the order of 8.6% and consisting essentially of the following composition: ______________________________________
Co 5 to 8%
Cr 6.5 to 10%
Mo 0.5 to 2.5%
W 5 to 9%
Ta 6 to 9%
Al 4.5 to 5.8%
Ti 1 to 2%
Nb 0 to 1.5%
C,Zr,B each less than 100 ppm
Ni remainder to 100%
______________________________________ the percentages being given by weight, and the following criteria being observed: the summation of the percentages by weight of Ta+Mo+1/2W lies between 11.5% and 13.5%; the summation of Ti+Al+Ta+Nb in atomic percentages lies between 15.5 and 17%; the summation of the atomic percentages of Ta+Nb+Mo+1/2W lies between 4 and 5.5%; the summation of the atomic percentages Ti+Al+Ta+Nb+Mo+1/2W lies between 17.5 and 19%; and the summation of the atomic percentages Ti+Al lies between 12.8% and 14.5%.
Claim 3
Dependent Claim
148 words
Monocrystalline alloy with a high creep resistance having a matrix of nickel base, of a density of the order of 8.6 without intentional addition of carbon, boron or zirconium, the alloy having the following composition: ______________________________________
Co 6 to 8%
Cr 6.5 to 8%
Mo 1 to 2.5%
W 5 to 8%
Ta 6 to 8%
Al 5 to 5.5%
Ti 1.1 to 2%
Nb 0 to 1%
Ni balance to 100%
______________________________________ the percentages being expressed by weight and the following additional criteria being observed: the summation of the percentages by weight of Ta+Mo+1/2W lies between 11.5% and 13.5%; the summation Ti+Al+Ta+Nb in atomic percentages lies between 15.5 and 17%; the summation of the atomic percentages Ta+Nb+Mo+1/2W lies between 4 and 5.5%; the summation of the atomic percentages Ti+Al+Ta+Nb+Mo+1/2W lies between 17.5 and 19%; and the summation of the atomic percentages Ti+Al lies between 12.8 and 14.5%.
Claim 4
Dependent Claim
148 words
Monocrystalline alloy with a high creep resistance having a matrix of nickel base, of a density of the order of 8.6 without intentional addition of carbon, boron or zirconium, the alloy having the following composition: ______________________________________
Co 6 to 8%
Cr 6.5 to 8%
Mo 1 to 2.5%
W 5 to 8%
Ta 6 to 8%
Al 5 to 5.5%
Ti 1.1 to 2%
Nb 0 to 1%
Ni balance to 100%
______________________________________ the percentages being expressed by weight and the following additional criteria being observed: the summation of the percentages by weight of Ta+Mo+1/2W lies between 11.5% and 13.5%; the summation Ti+Al+Ta+Nb in atomic percentages lies between 15.5 and 17%; the summation of the atomic percentages Ta+Nb+Mo+1/2W lies between 4 and 5.5%; the summation of the atomic percentages Ti+Al+Ta+Nb+Mo+1/2W lies between 17.5 and 19%; and the summation of the atomic percentages Ti+Al lies between 12.8 and 14.5%.
Claim 5
Dependent Claim
60 words
An alloy according to claim 1, wherein it is subjected to a heat treatment at high temperature in order to pass into solution completely the gamma-prime phase followed by a quenching in order to precipitate the gamma-prime phase while preventing the formation of gamma-prime phase with a size in excess of 0.3 micron, which is completed by two heat treatments.
Claim 6
Dependent Claim
60 words
An alloy according to claim 2, wherein it is subjected to a heat treatment at high temperature in order to pass into solution completely the gamma-prime phase followed by a quenching in order to precipitate the gamma-prime phase while preventing the formation of gamma-prime phase with a size in excess of 0.3 micron, which is completed by two heat treatments.
Claim 7
Dependent Claim
72 words
An alloy according to claim 1, having the following composition: ______________________________________
Co 8% by weight
Cr 7% by weight
Mo 2% by weight
W 5% by weight
Ta 8% by weight
Al 5% by weight
Ti 1.8% by weight
Nb 1% by weight
______________________________________ the remainder being nickel 1/2W+Ta+Mo: 12.5% by weight Al+Ti+Ta+Nb: 16.7% in atomic percentage Ta+Nb+Mo+1/2W: 5.4% in atomic percentage Ti+Al+Ta+Nb+Mo+1/2W: 18.85% in atomic percentage Ti+Al: 13.45% in atomic percentage.
Claim 8
Dependent Claim
72 words
An alloy according to claim 1, having the following composition: ______________________________________
Co 7.5% by weight
Cr 7% by weight
Mo 2% by weight
W 8% by weight
Ta 6% by weight
Al 5.3% by weight
Ti 1.5% by weight
Nb 0% by weight
______________________________________ the remainder being nickel 1/2W+Ta+Mo: 12% by weight Al+Ti+Ta+Nb: 15.8% in atomic percentage Ta+Nb+Mo+1/2W: 4.6% in atomic percentage Ti+Al+Ta+Nb+Mo+1/2W: 18.35% in atomic percentage Ti+Al: 13.75% in atomic percentage.
Claim 9
Dependent Claim
76 words
An alloy according to claim 1, having the following composition: ______________________________________
Co 6.5% by weight
Cr 7.5% by weight
Mo 1.5% by weight
W 7% by weight
Ta 6.5% by weight
Al 5.3% by weight
Ti 1.8% by weight
Nb 0%
______________________________________ the remainder being nickel, the following criteria also being observed 1/2W+Ta+Mo: 11.5% by weight Al+Ti+Ta+Nb: 16.2% in atomic percentage Ta+Nb+Mo+1/2W: 4.25% in atomic percentage Ti+Al+Ta+Nb+Mo+1/2W: 18.30% in atomic percentage Ti+Al: 14.05% in atomic percentage.
Claim 10
Dependent Claim
76 words
An alloy according to claim 1, having the following composition: ______________________________________
Co 5% by weight
Cr 10% by weight
Mo 0.5% by weight
W 6% by weight
Ta 9% by weight
Al 5.25% by weight
Ti 1.25% by weight
Nb 0%
______________________________________ the remainder being nickel, the following criteria also being observed 1/2W+Ta+Mo: 12.5 by weight Al+Ti+Ta+Nb: 16.25% in atomic percentage Ta+Nb+Mo+1/2W: 4.3% in atomic percentage Ti+Al+Ta+Nb+Mo+1/2W: 17.60% in atomic percentage Ti+Al: 13.3% in atomic percentage.
Claim 11
Dependent Claim
18 words
An alloy according to claim 1, wherein the percentage by weight of Nb lies between 0.5 and 1.5%.
Claim 12
Dependent Claim
33 words
An alloy according to claim 3, wherein the alloy is subject to heat treatment at 1280° C. over a period of 6 hours in order to pass the gamma-prime phase completely into solution.
Claim 13
Dependent Claim
31 words
An alloy according to claim 3, wherein the heat treatment takes place at 1310° C. over a period of 4 hours in order to pass the gamma-prime phase completely in solution.
Claim 14
Dependent Claim
31 words
An alloy according to claim 3, wherein the heat treatment takes place at 1300° C. over a period of 4 hours in order to pass the gamma-prime phase into complete solution.
Claim 15
Dependent Claim
24 words
An alloy according to claim 3, wherein the first tempering treatment takes place at 1100° C. over a period of 3 to 10 hours.
Claim 16
Dependent Claim
24 words
An alloy according to claim 3, wherein the second tempering treatment takes place at 850° C. over a period of 15 to 25 hours.
References Cited (Backward Citations)
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| 3.5 Years (Year 4) | 1990-01-26 | 1990-07-28 | 1991-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-26 | 1994-07-28 | 1995-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-26 | 1998-07-28 | 1999-01-27 | $7700.00 | Window Closed / Lapsed |