Metal treatment – Process of modifying or maintaining internal physical... – With casting or solidifying from melt
Patent
1994-03-01
1997-05-06
Simmons, David A.
Metal treatment
Process of modifying or maintaining internal physical...
With casting or solidifying from melt
148437, 148549, 164 661, 164 97, 420528, 420590, 428614, C22F 104
Patent
active
056266928
ABSTRACT:
The invention provides an aluminum-base composite material. The aluminum-base material contains a uniform distribution of carbide particles and lubricating phase particles such as carbon or graphite. The carbide particles increase hardness for improved wear resistance. The lubricating phase particles provide improved wear resistance and especially improve unlubricated wear resistance under increased loads. Finally, a dispersoid of nickel aluminide intermetallic phase may also be used to provide additional hardness and wear resistance. The composite is formed by introducing carbide particles and lubricating phase such as graphite into a molten aluminum alloy to neutraliize buoyancy and to form an aluminum-base mixture. Mixing the aluminum-base mixture to uniformly distribute carbide and carbon particles throughout the molten aluminum. Carbide and carbon particles counteract each other to remain uniformly distributed throughout the aluminum-base alloy despite prolonged holding or cooling times.
REFERENCES:
patent: 3885959 (1975-05-01), Badia et al.
patent: 5187021 (1993-02-01), Vydra et al.
Bell James A. E.
Rohatgi Pradeep K.
Stephenson Thomas F.
Biederman Blake T.
Inco Limited
Koehler Robert R.
Simmons David A.
Steen Edward A.
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