HIGH PERFORMANCE AlSiMgCu CASTING ALLOY

摘要

New aluminum casting alloys having 8.5-9.5 wt. % silicon, 0.8-2.0 wt. % copper (Cu), 0.20-0.53 wt. % magnesium (Mg), and 0.35 to 0.8 wt. % manganese are disclosed. The alloy may be solution heat treated, treated in accordance with T5 tempering and/or artificially aged to produce castings, e.g., for cylinder heads and engine blocks. In one embodiment, the castings are made by high pressure die casting.

主权项

1. An aluminum casting alloy consisting of:
8.5-9.5 wt. % silicon; 0.8-2.0 wt. % copper (Cu);
wherein 2.5≦ (Cu+10Mg)≦5.8; 0.20-0.53 wt. % magnesium (Mg); 0.35 to 0.8 wt. % manganese; up to 5.0 wt. % zinc; up to 1.0 wt. % silver; up to 1.0 wt. % nickel; up to 1.0 wt. % hafnium; up to 1.0 wt. % iron; up to 0.30 wt. % titanium; up to 0.30 wt. % zirconium; up to 0.30 wt. % vanadium; up to 0.10 wt. % of one or more of strontium, sodium and antimony; other elements being ≦0.04 wt. % each and ≦0.12 wt. % in total; the balance being aluminum.