US4702885A
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US
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Aluminum alloy and method for producing the same
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1986-06-27
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Granted: 1987-10-27
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Expires: 2006-06-27
Abstract
Abstract A process for producing an aluminum alloy comprises: producing an aluminum alloy powder, consisting of (A) 10 to 36 wt % of Si, 1 to 12 wt % of Fe, 2 to 10 wt % of at least one of metal selected from the group consisting of Ni, Co, Cr and Mn, reminder of the alloy powder consisting of aluminum, or consisting of (B) 10 to 36 wt % of Si, 2 to 10 wt % of Ni, 2 to 10 wt % of at least one of metal selected from the group consisting of Fe, Co, Cr, and Mn, and remainder of the alloy powder consisting of aluminum; compressing a mass of the powder by either compacting the power or accumulating the powder in a can where in case of compacting the powders are so as to have its actual density ratio of 65% to 90%, and in case of the accumulation the powders are compressed so as to have its actual density ratio of not more than 90%; heating the thus compressed mass of powder in convection type heating furnace at a temperature of 250 DEG C. to 550 DEG C. for 5 to 20 hours; and hot extrusion-working the mass of powders at extrusion ratio not less than 4:1, without cooling said heated compressed mass of powders.
Inventors
- 👤 Yusuke Odani
- 👤 Kiyoaki Akechi
- 👤 Nobuhito Kuroishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:00
CPC Classifications
C; C22; C22C; C22C21/00; C22C21/02; C22C21/04; C22C1/00; C22C1/04; C22C1/0408; C22C1/0416
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
183 words
A method for producing aluminum alloy comprising the steps of: (a) producing an aluminum alloy powder, said alloy powder consisting of 10 to 36 wt % of Si, 2 to 12 wt % of Fe, 2 to 10 wt % of at least one of metal selected from the group consisting of Ni, Co, Cr and Mn, the reminder consisting of aluminum; (b) compressing the mass of said powder by compacting said powder, or accumulating said powder in a can, in the case of said compacting, said powder being compacted to have an actual density ratio of 65% to 90%, and in the case of said accumulation, said powder being compressed to have an actual density ratio of not more than 90%; (c) heating said compressed mass of powder in a convection type heating furnace at a temperature of 250° C. to 550° C. for 5 to 20 hours; and (d) hot extrusion-working said mass of powder at an extrusion ratio of not less than 4 : 1, without cooling the resulting heated compressed mass of powder to produce an aluminum alloy product.
Claim 2
Independent Claim
183 words
A method for producing aluminum alloy comprising the steps of: (a) producing an aluminum alloy powder, said alloy powder consisting of 10 to 36 wt % of Si, 2 to 12 wt % of Fe, 2 to 10 wt % of at least one of metal selected from the group consisting of Ni, Co, Cr and Mn, the reminder consisting of aluminum; (b) compressing the mass of said powder by compacting said powder, or accumulating said powder in a can, in the case of said compacting, said powder being compacted to have an actual density ratio of 65% to 90%, and in the case of said accumulation, said powder being compressed to have an actual density ratio of not more than 90%; (c) heating said compressed mass of powder in a convection type heating furnace at a temperature of 250° C. to 550° C. for 5 to 20 hours; and (d) hot extrusion-working said mass of powder at an extrusion ratio of not less than 4 : 1, without cooling the resulting heated compressed mass of powder to produce an aluminum alloy product.
Claim 3
Dependent Claim
28 words
The method of claim 1, wherein not more than 6.5 wt % of Cu and not more than 2 wt % of Mg are added in step (a).
Claim 4
Dependent Claim
24 words
The method of claim 1, wherein said aluminum alloy powder has precipitate particles having crystal grains being not more than 10 μm in size.
Claim 5
Dependent Claim
40 words
The method of claim 1, wherein said aluminum alloy powder is produced by melting component raw materials in a hot crucible and atomizing the melted alloy, with simultaneous cooling, at a cooling rate of not less than 10 2 K/sec.
Claim 6
Dependent Claim
18 words
The method of claim 4, wherein said atomized aluminum alloy powder has a mesh size of -40 mesh.
Claim 7
Dependent Claim
19 words
The method of claim 1, wherein said aluminum alloy powder is filled in a metal die in step (b).
Claim 8
Dependent Claim
18 words
The method of claim 1, wherein cold-isostatic pressure is applied to said aluminum alloy powder in step (b).
Claim 9
Dependent Claim
22 words
The method of claim 1, wherein said aluminum alloy product has a modulus of elasticity not less than 8,000 kg/cm 2 .
Claim 10
Dependent Claim
22 words
The method of claim 1, wherein during step (c), said mass of said powder is heated in air by an electric heater.
Claim 11
Dependent Claim
24 words
The method of claim 1, wherein during step (c), said mass of said powder is heated in a non-oxidative condition by an electric heater.
Claim 12
Dependent Claim
15 words
The method of claim 1, wherein said mass of powder is degassed during step (c).
Claim 13
Dependent Claim
29 words
The method of claim 15, wherein said aluminum alloy product consists of 20 wt % of Si, 8 wt % of Ni, Cu, and Mg, and the remainder, Al.
Claim 14
Dependent Claim
30 words
The method of claim 1, wherein said aluminum alloy product consists of 20 wt % of Si, 5 wt % of Fe, 2 wt % of Ni, and remainder Al.
Claim 15
Dependent Claim
27 words
The method of claim 1, wherein said aluminum alloy product consists of 12 wt % of Si, 5 wt % of Fe, Co, Mg and remainder Al.
Claim 16
Independent Claim
184 words
A method for producing aluminum alloy comprising the steps of: (a) producing an aluminum alloy powder, said alloy powder consisting of 10 to 36 wt % of Si, 2 to 10 wt % of Ni, 2 to 10 wt % of at least one of metal selected from the group consisting essentially of Fe, Co, Cr and Mn, and the remainder consisting of aluminum; (b) compressing the mass of said powder by compacting said powder, or accumulating said powder in a can, in the case of said compacting, said powder being compacted to have an actual density ratio of 65% to 90%, and in the case of said accumulation, said powder being compressed to have an actual density ratio of not more than 90%; (c) heating said compressed mass of powder in a convection type heating furnace at a temperature of 250° C. to 550° C. for 5 to 20 hours;and (d) hot extrusion-working said mass of powder at an extrusion ratio of not less than 4 : 1, without cooling the resulting heated compressed mass of powder to produce an aluminum alloy product.
Claim 17
Independent Claim
184 words
A method for producing aluminum alloy comprising the steps of: (a) producing an aluminum alloy powder, said alloy powder consisting of 10 to 36 wt % of Si, 2 to 10 wt % of Ni, 2 to 10 wt % of at least one of metal selected from the group consisting essentially of Fe, Co, Cr and Mn, and the remainder consisting of aluminum; (b) compressing the mass of said powder by compacting said powder, or accumulating said powder in a can, in the case of said compacting, said powder being compacted to have an actual density ratio of 65% to 90%, and in the case of said accumulation, said powder being compressed to have an actual density ratio of not more than 90%; (c) heating said compressed mass of powder in a convection type heating furnace at a temperature of 250° C. to 550° C. for 5 to 20 hours;and (d) hot extrusion-working said mass of powder at an extrusion ratio of not less than 4 : 1, without cooling the resulting heated compressed mass of powder to produce an aluminum alloy product.
Claim 18
Dependent Claim
28 words
The method of claim 15, wherein not more than 6.5 wt % of Cu and not more than 2 wt % of Mg are added in step (a).
Claim 19
Dependent Claim
24 words
The method of claim 15, wherein said aluminum alloy powder has precipitate particles having crystal grains being not more than 10 μm in size.
Claim 20
Dependent Claim
40 words
The method of claim 15, wherein said aluminum alloy powder is produced by melting component raw materials in a hot crucible and atomizing the melted alloy, with simultaneous cooling, at a cooling rate of not less than 10 2 K/sec.
Claim 21
Dependent Claim
18 words
The method of claim 18, wherein said atomized aluminum alloy powder has a mesh size of -40 mesh.
Claim 22
Dependent Claim
19 words
The method of claim 15, wherein said aluminum alloy powder is filled in a metal die in step (b).
Claim 23
Dependent Claim
18 words
The method of claim 15, wherein cold-isostatic pressure is applied to said aluminum alloy powder in step (b).
Claim 24
Dependent Claim
22 words
The method of claim 15, wherein said aluminum alloy product has a modulus of elasticity not less than 8,000 kg/cm 2 .
Claim 25
Dependent Claim
22 words
The method of claim 15, wherein during step (c), said mass of said powder is heated in air by an electric heater.
Claim 26
Dependent Claim
24 words
The method of claim 15, wherein during step (c), said mass of said powder is heated in a non-oxidative condition by an electric heater.
Claim 27
Dependent Claim
15 words
The method of claim 15, wherein said mass of powder is degassed during step (c).
Claim 28
Dependent Claim
30 words
The method of claim 15, wherein said aluminum alloy product consists of 20 wt % of Si, 5 wt % of Fe, 2 wt % of Ni, and remainder Al.
Claim 29
Dependent Claim
27 words
The method of claim 15, wherein said aluminum alloy product consists of 12 wt % of Si, 5 wt % of Fe, Co, Mg and remainder Al.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1990-10-26 | 1991-04-27 | 1991-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-26 | 1995-04-27 | 1995-10-27 | $3760.00 | Window Closed / Lapsed |
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