C - Chemistry – Metallurgy – 22 – F
Patent
C - Chemistry, Metallurgy
22
F
148/11
C22F 1/04 (2006.01)
Patent
CA 1180988
Abstract of the Disclosure: A cast article of aluminum alloy is produced by pour- ing into a mold a molten Al-Si-Cu type or Al-Si-Cu-mg type cast- ing alloy having an antimony (Sb) content in the ran e of about 0.03% - 1.0% by weight and, while the alloy cast body is cooling following complete solidification but before its temperature has fallen below 450°C, placing the solidified cast body into a heat- ing furnace kept at temperatures in the range of from 480 to 530°C and retaining it at an intermediately high-temperature with- in that temperature range for not more than two hours, subsequently quenching said cast body in cold water or hot water and there- after subjecting the quenched cast body to a treatment for artificial aging at temperatures in the range of from 140 to 230°C for a period in the range of from one to 12 hours. The resulting cast articles are, in terms of strength, toughness and resistance to thermal shocks, comparable with or superior to cast articles obtained by conventional methods but can be manufactured in a reduced period of time with consequential savings in cost.
390203
Hashimoto Akio
Ito Tadao
Kirby Eades Gale Baker
Nippon Light Metal Company Limited
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