US4722751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dispersion-strengthened heat- and wear-resistant aluminum alloy and process for producing same
Assignee: Sumitomo Electric Industries Ltd
•
Filing: 1984-12-19
•
Granted: 1988-02-02
•
Expires: 2004-12-19
Abstract
Abstract A light weight and high strength aluminum alloy and a process for producing such an alloy, which alloy is suitable for forming automotive engine components, including pistons. In a preferred embodiment, 80 to 99.5% by volume of an aluminum alloy powder or a mixed powder composed of pure metal powders or master alloy powders is blended with 0.5 to 20% by volume of at least one of carbon or graphite powder, an oxide powder, a carbide powder and a nitride powder. The blend is then mechanically alloyed, following which the thereby-obtained powder is subjected to working such as by compaction and hot forging, hot pressing, cold isostatic pressing and hot forging, or cold isostatic pressing and hot extrusion. By the use of mechanical alloying, the advantages of a rapidly solidified powder having a supersaturated solid solution and uniform fine crystal grains are attained, and the effect of dispersion-strengthening is brought about by the addition of dispersion particles to the micro structure of the rapidly solidified powder.
Inventors
- 👤 Kiyoaki Akechi
- 👤 Nobuhito Kuroishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:34
CPC Classifications
C; C22; C22C; C22C32/00; C22C32/0084; C22C1/00; C22C1/10; C22C1/1084; C22C32/0047; C22C32/0068
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
123 words
A dispersion-strengthened heat-resistant and wear-resistant aluminum alloy produced by the process comprising the steps of: blending 80% to 99.5% by volume of an aluminum-containing powder consisting essentially of a rapidly solidified aluminum alloy powder, a mixed powder consisting essentially of pure metal powders, or a master alloy powder with, 0.5 to 20% by volume of at least one component selected from the group consisting of carbon powder, graphite powder, silicon oxide powder, aluminum oxide powder, silicon carbide powder, aluminum carbide powder, silicon nitride powder, aluminum nitride powder and mixtures thereof, whereby a blend is obtained, mechanically alloying the thus obtained blend to obtain a powder, and subjecting the thus obtained powder to working whereby a dispersion-strengthened heat-resistant and wear-resistant aluminum alloy is obtained.
Claim 2
Dependent Claim
123 words
A dispersion-strengthened heat-resistant and wear-resistant aluminum alloy produced by the process comprising the steps of: blending 80% to 99.5% by volume of an aluminum-containing powder consisting essentially of a rapidly solidified aluminum alloy powder, a mixed powder consisting essentially of pure metal powders, or a master alloy powder with, 0.5 to 20% by volume of at least one component selected from the group consisting of carbon powder, graphite powder, silicon oxide powder, aluminum oxide powder, silicon carbide powder, aluminum carbide powder, silicon nitride powder, aluminum nitride powder and mixtures thereof, whereby a blend is obtained, mechanically alloying the thus obtained blend to obtain a powder, and subjecting the thus obtained powder to working whereby a dispersion-strengthened heat-resistant and wear-resistant aluminum alloy is obtained.
Claim 3
Dependent Claim
29 words
A dispersion-strengthened, heat-resistant and wear-resistant aluminum alloy according to claim 1, wherein said aluminum-containing powder is blended with 0.5 to 20% by volume of carbon powder or graphite powder.
Claim 4
Dependent Claim
37 words
The high temperature and wear-resistant aluminum alloy according to claim 2, wherein said step of working comprises at least one of compaction and sintering, hot pressing, P/M forging, powder rolling, hot isostatic pressing and hot extrusion molding.
Claim 5
Dependent Claim
51 words
The dispersion-strengthened, high-temperature and wear-resistant aluminum alloy according to claim 3, wherein the rapidly solidified aluminum containing powder consists of 5 to 45% Si, 0 to 5% Cu, 0 to 2% Mg, with the balance of said aluminum containing powder being on an Al, said percentages being on a weight basis.
Claim 6
Dependent Claim
62 words
The dispersion-strengthened, high-temperature and wear-resistant aluminum alloy according to claim 3, wherein the rapidly solidified aluminum-containing powder consists of 2 to 12% Fe, 0 to 7%, of at least one element selected from the group consisting of Co, Ni, Cr, Mn, Ce, Ti, Zr and Mo, with the balance of said aluminum-containing powder being Al, said percentages being on a weight basis.
Claim 7
Dependent Claim
73 words
The dispersion-strengthened, high-temperature and wear-resistant aluminum alloy according to claim 3, wherein the rapidly solidified aluminum-containing powder consists of 5 to 25% Si, 2 to 12% Fe, 0 to 5% Cu, 0 to 2% Mg, 0.7% of at least one element selected from the group consisting of Co, Ni, Cr, Mn, Ce, Ti, Zr and Mo, with the balance of said aluminum-containing alloy powder being Al, said percentages being on a weight basis.
Claim 8
Dependent Claim
48 words
The dispersion-strengthened, heat-resistant and wear-resistant aluminum alloy according to claim 1, wherein the aluminum-containing powder consists of 5% to 45% Si, 0% to 5% Cu, 0% to 2% Mg, with the remainder as said aluminum containing alloy powder being Al, said percentage as being on a weight basis.
Claim 9
Dependent Claim
44 words
The dispersion-strengthened heat-resistant and wear-resistant aluminum alloy according to claim 3, wherein said component is a carbon powder, graphite powder, a silicon oxide powder, and an aluminum carbide powder, a silicon carbide powder, an aluminum nitride powder, a silicon nitride powder, and mixtures thereof.
Claim 10
Dependent Claim
59 words
The dispersion-strengthened, heat-resistant and wear-resistant aluminum alloy according to claim 1, wherein the aluminum-containing powder consists of 2% to 12% Fe, 0% to 7% of at least one element selected from the group consisting of Co, Ni, Cr, Mn, Ce, Ti, Zr and Mo, with the balance of said aluminum-containing powder being aluminum, said percentages being on weight basis.
Claim 11
Dependent Claim
43 words
The dispersion-strengthened heat-resistant and wear-resistant aluminum alloy according to claim 9, wherein said component is a carbon powder, graphite powder, a silicon oxide powder, an aluminum carbide powder, a silicon carbide powder, an aluminum nitride powder, a silicon nitride powder, and mixtures thereof.
Claim 12
Dependent Claim
40 words
The dispersion-strengthened heat- and wear-resistant aluminum alloy according to claim 1, wherein said step of working comprises at least one of compaction and hot forging, hot pressing, cold isostatic pressing and hot forging, and cold isostatic pressing and hot extrusion.
Claim 13
Dependent Claim
20 words
The dispersion-strengthened heat-resistant and wear-resistant aluminum alloy according to claim 1, wherein said component is Al 4 C 3 .
Claim 14
Dependent Claim
18 words
The dispersion-strengthened heat-resistant and wear-resistant aluminum alloy according to claim 1, wherein said component is silicon carbide (SiC).
Claim 15
Dependent Claim
22 words
The dispersion-strengthened heat-resistant and wear-resistant aluminum alloy according to claim 1, wherein said component is silicon nitride (Si 3 N 4 ).
Claim 16
Dependent Claim
43 words
The dispersion-strengthened heat-resistant and wear-resistant aluminum alloy according to claim 1, wherein said component is a carbon powder, graphite powder, a silicon oxide powder, an aluminum carbide powder, a silicon carbide powder, an aluminum nitride powder, a silicon nitride powder, and mixtures thereof.
References Cited (Backward Citations)
US2974039A
Cited
US3791800A
Cited
US3816080A
Cited
US3961945A
Cited
US4156053A
Cited
GB2088409A
Cited
JPS6050137A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-02-01 | 1991-08-03 | 1992-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-01 | 1995-08-03 | 1996-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-01 | 1999-08-03 | 2000-02-02 | $7700.00 | Window Closed / Lapsed |