Aluminum alloys having improved mechanical properties and workab

Details Aluminum alloys having improved mechanical properties and workab Aluminum alloys having improved mechanical properties and workab

1975-04-10

1978-03-07

Dean, R.

Metal treatment

Compositions

Heat treating

295277, 75142, 148 3, 148 115A, 148 127A, 148 32, 148 325, C22F 104

Patent

active

040778100

ABSTRACT:
An aluminum alloy consisting essentially of 8 to 15% by weight of silicon, 0.05 to 0.7% by weight of magnesium, 1 to 4.5% by weight of copper, the balance being aluminum, wherein a silicon crystal in eutectic structure crystallized out in an aluminum matrix has a mean grain size not larger than 5 microns and intermetallic compounds of magnesium and copper are finely precipitated in the matrix as age-hardening elements for the matrix, and the alloy has at least 40 kg/mm.sup.2 tensile strength and at least 10% elongation, good antiwearing and excellent workability.
The disclosure is also concerned with a method of making the above-mentioned aluminum alloy.

REFERENCES:
patent: 1508556 (1924-09-01), Jeffries et al.

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