Hypereutectic aluminum silicon alloy

Details Hypereutectic aluminum silicon alloy Hypereutectic aluminum silicon alloy

1989-04-14

1990-11-13

Dolinar, Andrew M.

Internal-combustion engines

Frame construction

Horizontal cylinder

420534, C22C 2100

Patent

active

049694286

ABSTRACT:
A hypereutectic aluminum silicon alloy having an improved distribution of primary silicon in the microstructure. The alloy is composed by weight of 20% to 30% silicon, 0.4% to 1.6% magnesium, up to 1.4% iron, up to 0.3% manganese, 0.25% copper maximum and the balance aluminum. With this composition the aluminum silicon alloy system exhibits near zero shrinkage on solidification, a similarity of the liquid aluminum-silicon alloy and the primary silicon during the early stages of primary silicon precipitation, and thereby minimizes floatation of the precipitated primary silicon and to provide a more uniform distribution of the primary silicon in the microstructure and increase the wear resistant characteristics of the alloy.

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Alloy Digest, Reynolds 390 and A390, Aug. 1971.
Alloy Digest, Aluminum 392.0, Sep., 1970.
Ward's Engine Update, "Top Engine Designers Laud Sleeveless Alloy Use", May 1982.

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