Method for producing aluminum alloy castings and the resulting p

Details Method for producing aluminum alloy castings and the resulting p Method for producing aluminum alloy castings and the resulting p

1986-12-22

1989-02-28

Dean, R.

Alloys or metallic compositions

Aluminum base

Copper containing

148 3, 148159, 148416, 148417, 148437, 148438, 148439, 420534, 420548, C22C 102

Patent

active

048083747

ABSTRACT:
A method for producing aluminum alloy castings and the resulting product having improved toughness. An Al-Si or Al-Si-Cu alloy containing 4 to 24 wt % of silicon, iron and other incidental impurities, the balance being aluminum is melted, and the melt is heated to a temperature between 780.degree. C. and 950.degree. C. The melt is poured into a mold and there solidified. A solution heat treatment and aging are then conducted. The process is suitable for an alloy containing 0.25 to 1.4 wt % of iron. In a preferred embodiment, the alloy consists essentially of 6 to 12 wt % Si, 2 wt % Cu, 0.2 to 0.4 wt % Mg and other incidental impurities, the balance being aluminum. The solution heat treatment is preferably carried out by heating between 525.degree. 545.degree. C. for a period of 1 to 5 hours.

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

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