EP0136508A2
Expired / Lapsed
EP
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Aluminum-transition metal alloys having high strength at elevated temperatures
Assignee: Honeywell International Inc
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Filing: 1984-08-20
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Granted: —
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Expires: 2004-08-20
Abstract
Abstract The invention provides an aluminum based alloy consisting essentially of the formula Al bal Fe a X b , wherein X is at least one element selected from the group consisting of Zn, Co, Ni, Cr, Mo, V, Zr, Ti, Y, Si and Ce, "a" ranges from about 7-15 wt %, "b" ranges from about 1.5-10 wt % and the balance is aluminum. The alloy has a predominately microeutectic microstructure. The invention also provides a method and apparatus for forming rapidly solidified metal, such as the metal alloys of the invention, within an ambient atmosphere. Generally stated, the apparatus includes a moving casting surface which has a quenching region for solidifying molten metal thereon. A reservoir holds molten metal and has orifice means for depositing a stream of molten metal onto the casting surface quenching region. A heat mechanism heats the molten metal contained within the reservoir, and a gas source provides a non-reactive gas atmosphere at the quenching region to minimize oxidation of the deposited metal. A conditioning mechanism disrupts a moving gas boundary layer carried along by the moving casting surface to minimize disturbances of the molten metal stream that would inhibit quenching of the molten metal on the casting surface at a quench rate of at least about 10'Cisec. Particles composed of the alloys of the invention can be heated in a vacuum and compacted to form a consolidated metal article have high strength and good ductility at both room temperature and at elevated temperatures of about 350°C. The consolidated article is composed of an aluminum solid solution phase containing a substantially uniform distribution of dispersed intermetallic phase precipitates therein. These precipitates are fine intermetallics measuring less than about 100 nm in all dimensions thereof.
Inventors
- 👤 David John Skinner
- 👤 Paul Andrew Chipko
- 👤 Kenji Okazaki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 18:06
CPC Classifications
C; C22; C22C; C22C21/00; C22C45/00; C22C45/08
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
70 words
An aluminum-base alloy consisting essentially of the formula Al bal Fe a X b , wherein X is at least one element selected from the group consisting of Zn, Co, Ni, Cr, Mo, V, Zr, Ti, Y, Si and Ce, "a" ranges from about 7-15 wt %, "b" ranges from 1.5-10 wt % and the balance is aluminum, said alloy having a microstructure which is at least 70 % microeutectic.
Claim 2
Dependent Claim
70 words
An aluminum-base alloy consisting essentially of the formula Al bal Fe a X b , wherein X is at least one element selected from the group consisting of Zn, Co, Ni, Cr, Mo, V, Zr, Ti, Y, Si and Ce, "a" ranges from about 7-15 wt %, "b" ranges from 1.5-10 wt % and the balance is aluminum, said alloy having a microstructure which is at least 70 % microeutectic.
Claim 3
Dependent Claim
22 words
An alloy as recited in claim 1, wherein said alloy has an as-cast hardness of at least 320 kg/mm2 at room temperature.
Claim 4
Dependent Claim
21 words
An aluminum-base alloy as recited in claim 2, wherein said alloy has a microstructure which is at least about 90% microeutectic.
Claim 5
Dependent Claim
19 words
An aluminum alloy as recited in claim 1, wherein said alloy has a microstructure which is approximately 100% microeutectic.
Claim 6
Dependent Claim
182 words
- An apparatus for forming rapidly solidified metal within an ambient atmosphere, comprising: (a) a movable casting surface which has a quenching region for solidifying molten metal thereon; (b) reservoir means for holding molten metal, said reservoir means having orifice means for depositing a stream of molten metal on said casting surface quenching region; (c) heating means for heating molten metal contained in said reservoir; (d) gas means for providing a non-reactive gas atmosphere at said quenching region to minimize oxidation of said deposited metal; (e) conditioning means for disrupting a moving gas boundary layer carried along by said moving. casting surface to minimize disturbances of said molten metal stream that would inhibit quenching of the molten metal on the casting surface, said conditioning means comprised of a high velocity gas jet spaced from said reservoir in a direction counter to the direction ot casting surface movement and directed toward said movable casting surface to strike and disrupt the moving gas boundary layer carried along by the casting surface and thereby minimize disturbance of said molten metal stream by said boundary layer.
Claim 7
Dependent Claim
182 words
- An apparatus for forming rapidly solidified metal within an ambient atmosphere, comprising: (a) a movable casting surface which has a quenching region for solidifying molten metal thereon; (b) reservoir means for holding molten metal, said reservoir means having orifice means for depositing a stream of molten metal on said casting surface quenching region; (c) heating means for heating molten metal contained in said reservoir; (d) gas means for providing a non-reactive gas atmosphere at said quenching region to minimize oxidation of said deposited metal; (e) conditioning means for disrupting a moving gas boundary layer carried along by said moving. casting surface to minimize disturbances of said molten metal stream that would inhibit quenching of the molten metal on the casting surface, said conditioning means comprised of a high velocity gas jet spaced from said reservoir in a direction counter to the direction ot casting surface movement and directed toward said movable casting surface to strike and disrupt the moving gas boundary layer carried along by the casting surface and thereby minimize disturbance of said molten metal stream by said boundary layer.
Claim 8
Independent Claim
157 words
A method for casting metal strip in an ambient atmosphere, comprising of steps of: moving a casting surface, which is adapted to quench and solidify molten metal thereon, at a selected velocity; depositing a stream of molten metal onto a quenching region of said casting surface to solidify said molten metal at a quench rate of at least about 10 6 °C/sec; providing a non-reactive gas atmosphere at said quenching region to minimize oxidation of said deposited metal; and disrupting a moving gas boundary layer carried along by said moving casting surface to minimize disturbances of said molten metal stream that would inhibit the quenching of the molten metal on the casting surface by directing a high velocity jet of gas toward said boundary layer , said jet impacting said boundary layer at a location spaced from said quenching region in a direction counter to the direction of casting surface movement to thereby disrupt said boundary layer.
Claim 9
Independent Claim
157 words
A method for casting metal strip in an ambient atmosphere, comprising of steps of: moving a casting surface, which is adapted to quench and solidify molten metal thereon, at a selected velocity; depositing a stream of molten metal onto a quenching region of said casting surface to solidify said molten metal at a quench rate of at least about 10 6 °C/sec; providing a non-reactive gas atmosphere at said quenching region to minimize oxidation of said deposited metal; and disrupting a moving gas boundary layer carried along by said moving casting surface to minimize disturbances of said molten metal stream that would inhibit the quenching of the molten metal on the casting surface by directing a high velocity jet of gas toward said boundary layer , said jet impacting said boundary layer at a location spaced from said quenching region in a direction counter to the direction of casting surface movement to thereby disrupt said boundary layer.
Claim 10
Dependent Claim
116 words
A consolidated metal article compacted from particles of an aluminum-base alloy having a microeutectic microstructure, that is at least 90% microeutetic, and consisting essentially of the formula Al bal Fe a X b' wherein X is at leat one element selected from the group consisting of Zn, Co, Ni, Cr, Mo, V, Zr, Ti, Y, Si and Ce, "a" ranges from about 7 to 15 wt%, "b" ranges from about 1.5 to 10 wt%, and the balance is Al; said consolidated article composed of an aluminum solid solution phase containing therein a substantially uniform distribution of dispersed, intermetallic phase precipitates, wherein said precipitates are fine intermetallics measuring less than about 100 nm in all dimensions thereof.
Claim 11
Dependent Claim
116 words
A consolidated metal article compacted from particles of an aluminum-base alloy having a microeutectic microstructure, that is at least 90% microeutetic, and consisting essentially of the formula Al bal Fe a X b' wherein X is at leat one element selected from the group consisting of Zn, Co, Ni, Cr, Mo, V, Zr, Ti, Y, Si and Ce, "a" ranges from about 7 to 15 wt%, "b" ranges from about 1.5 to 10 wt%, and the balance is Al; said consolidated article composed of an aluminum solid solution phase containing therein a substantially uniform distribution of dispersed, intermetallic phase precipitates, wherein said precipitates are fine intermetallics measuring less than about 100 nm in all dimensions thereof.
Claim 12
Dependent Claim
24 words
8 . A consolidated metal article as recited in claim 7, wherein the volume fraction of said fine intermetallics ranges from 25 to 45%.
Claim 13
Dependent Claim
26 words
A consolidated metal article as recited in claim 7, wherein each of said fine intermetallics has a largest dimension measuring not more than about 20 nm.
References Cited (Backward Citations)
No citation records indexed.
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