EP0147769A2
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EP
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Dispersion-strengthened heat- and wear-resistant aluminum alloy and process for producing same
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1984-12-18
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Granted: —
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Expires: 2004-12-18
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 C/O Itami W. Sumitomo E. Ind. Ltd. Akechi
- 👤 Nobuhito C/O Itami W Sumitomo E Ind.Ltd. Kuroishi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 10:12
CPC Classifications
C; C22; C22C; C22C32/00; C22C32/0084; C22C1/00; C22C1/10; C22C1/1084; C22C32/0047; C22C32/0068
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
83 words
A dispersion-strengthened heat- and wear-resistant aluminum alloy produced .by the process comprising the steps of: blending 80 to 99.5% by volume of an aluminum alloy powder or a mixed powder composed of pure metal powders or master alloy powders with 0.5 to 20% by volume of at least one component selected from the group consisting of a carbon powder or graphite powder, an oxide powder, a carbide powder and a nitride powder; mechanically alloying the blend; and subjecting the obtained powder to working.
Claim 2
Dependent Claim
83 words
A dispersion-strengthened heat- and wear-resistant aluminum alloy produced .by the process comprising the steps of: blending 80 to 99.5% by volume of an aluminum alloy powder or a mixed powder composed of pure metal powders or master alloy powders with 0.5 to 20% by volume of at least one component selected from the group consisting of a carbon powder or graphite powder, an oxide powder, a carbide powder and a nitride powder; mechanically alloying the blend; and subjecting the obtained powder to working.
Claim 3
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 4
Dependent Claim
47 words
The dispersion-strengthened heat- and wear-resistant aluminum alloy according to claim 1, wherein the aluminum alloy powder, mixed powder or master alloy powder consists of 5 to 45% Si, 0 to 5% Cu, 0 to 2% Mg, and the balance Al, the percentages being on a weight basis.
Claim 5
Dependent Claim
62 words
The dispersion-strengthened heat- and wear-resistant aluminum alloy according to claim 1, wherein the aluminum alloy powder, mixed powder or master alloy 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, and the balance Al, the percentages being on a weight basis.
Claim 6
Dependent Claim
93 words
A process for producing a dispersion-strengthened heat- and wear-resistant aluminum alloy comprising the steps of: preparing an aluminum alloy powder or mixed powder by rapid solidification at 100°C/sec or higher; blending 80 to 99.5% by volume of said aluminum alloy powder or mixed powder with 0.5 to 20% by volume of at least one component selected from the group consisting of a carbon powder or graphite powder, an oxide powder, a carbide powder and a nitride powder; mechanically alloying the blend to form a composite powder; and subjecting the obtained powder to working.
Claim 7
Dependent Claim
93 words
A process for producing a dispersion-strengthened heat- and wear-resistant aluminum alloy comprising the steps of: preparing an aluminum alloy powder or mixed powder by rapid solidification at 100°C/sec or higher; blending 80 to 99.5% by volume of said aluminum alloy powder or mixed powder with 0.5 to 20% by volume of at least one component selected from the group consisting of a carbon powder or graphite powder, an oxide powder, a carbide powder and a nitride powder; mechanically alloying the blend to form a composite powder; and subjecting the obtained powder to working.
Claim 8
Dependent Claim
34 words
The process for producing a dispersion-strengthened heat- wear-resistant aluminum alloy according to claim 5, wherein said step of working comprises at least one of compaction and hot forging, and isostatic pressing and hot extrusion.
Claim 9
Dependent Claim
63 words
A high-temperature and wear-resistant aluminum alloy produced by the process comprising the steps of: first blending 80 to 99.5% by volume of a rapidly solidified aluminum alloy powder or mixed powder composed of pure metal powders or master alloy powders with 0.5 to 20% by volume of a carbon or graphite powder; mechanically alloying the blend; and subjecting the obtained powder to working.
Claim 10
Dependent Claim
63 words
A high-temperature and wear-resistant aluminum alloy produced by the process comprising the steps of: first blending 80 to 99.5% by volume of a rapidly solidified aluminum alloy powder or mixed powder composed of pure metal powders or master alloy powders with 0.5 to 20% by volume of a carbon or graphite powder; mechanically alloying the blend; and subjecting the obtained powder to working.
Claim 11
Dependent Claim
37 words
The high temperature and wear-resistant aluminum alloy according to claim 7, 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 12
Dependent Claim
45 words
The high-temperature and wear-resistant aluminum alloy according to claim 8, wherein the rapidly solidified aluminum alloy powder or mixed powder consists of 5 to 45% Si, 0 to 5% Cu, 0 to 2% Mg, and the balance Al, the percentage being on a weight basis.
Claim 13
Dependent Claim
60 words
The high-temperature and wear-resistant aluminum alloy according to claim 8, wherein the rapidly solidified aluminum alloy powder or mixed 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, and the balance Al, the percentage being on a weight basis.
Claim 14
Dependent Claim
72 words
ll. The high-temperature and wear-resistant aluminum alloy according to claim 8, wherein the rapidly solidified aluminum alloy powder or mixed powder consists of 5 to 25% Si, 2 to 12% Fe, 0 to 5% Cu, 0 to 2% Mg, 0 to 7% of at least one element selected from the group consisting Co, Ni, Cr, Mn, Ce, Ti, Zr and Mo, and the balance Al, the percentage being on a weight basis.
Claim 15
Dependent Claim
65 words
A process for producing a high-temperature and wear-resistant aluminum alloy comprising the steps of: blending 80 to 99.5% by volume of a rapidly solidified aluminum alloy powder or mixed powder with 0.5 to 20% by volume of a carbon or graphite powder; adding 0.05 to 3% by volume of a lubricant to the blend; mechanically alloying the blend; and subjecting the obtained powder to working.
Claim 16
Dependent Claim
65 words
A process for producing a high-temperature and wear-resistant aluminum alloy comprising the steps of: blending 80 to 99.5% by volume of a rapidly solidified aluminum alloy powder or mixed powder with 0.5 to 20% by volume of a carbon or graphite powder; adding 0.05 to 3% by volume of a lubricant to the blend; mechanically alloying the blend; and subjecting the obtained powder to working.
Claim 17
Dependent Claim
40 words
The process for producing a high-temperature and wear-resistant aluminum alloy according to claim 12, wherein said step of working comprises at least one of compaction and sintering, hot pressing, powder forging, powder rolling, hot isostatic pressing and hot extrusion molding.
Claim 18
Dependent Claim
29 words
The process for producing a high-temperature and wear-resistant aluminum alloy according to claim 13, wherein said lubricant is selected from the group consisting of water, oil and organic solvents.
References Cited (Backward Citations)
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