C - Chemistry – Metallurgy – 22 – F
Patent
C - Chemistry, Metallurgy
22
F
148/11
C22F 1/04 (2006.01) C22C 21/02 (2006.01) C22F 1/043 (2006.01)
Patent
CA 1235048
ABSTRACT OF THE DISCLOSURE 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°C and 950°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 and 545°C for a period of 1 to 5 hours.
454955
Awano Yoji
Shimizu Yoshihiro
Takabatake Junichi
Kabushiki Kaisha Toyota Chuo Kenkyusho
Riches Mckenzie & Herbert Llp
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