Plastically worked cast aluminum alloy product, a...

Details Plastically worked cast aluminum alloy product, a... Plastically worked cast aluminum alloy product, a...

2005-03-15

2005-03-15

Wyszomierski, George (Department: 1742)

Metal founding

Process

Shaping liquid metal against a forming surface

C164S122000, C164S076100, C164S120000, C228S136000

Reexamination Certificate

active

06866085

ABSTRACT:
The newly proposed cast aluminum alloy product has the composition consisting of 6.5-8.0% Si, 0.25-0.45% Mg, 0.08-0.40% Fe, 0.001-0.01% Ca, P less than 0.001%, 0.02-0.1% Ti, 0.001-0.01% B, optionally one or two of 0.05-0.3% Cr and 0.05-0.2% Mn, and the balance being Al except inevitable impurities. It has the metallurgical structure that an α-Al phase in a surface layer is of average grain size different by 50 μm or less from an α-Al phase in an inner part, and that a maximum size of eutectic Si particles is 400 μm or smaller. It is manufactured by injecting a molten aluminum alloy into metal dies at an injection speed of 0.05-0.25 m/second, and then cooling the injected alloy at a cooling speed of 20° C./or higher in a temperature range between liquidus and solidus curves in a state charged with a pressure of 30 MPa or higher. Since the cast product is good of ductility, it is used as a member for coupling another member therewith by calking or the like.

REFERENCES:
patent: 5230754 (1993-07-01), Setzer et al.
patent: 59189055 (1984-10-01), None
patent: 06-145866 (1994-05-01), None
“Aluminum and Aluminum Alloys”, ASM International, 1993, pp 89,98 and 99.*
ASM Handbook: “Casting”, vol. 15, pp. 476-486, Sep. 1988; May 1992.

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