| 摘要 |
Ductile aluminum alloy destined for casting under pressure has the following composition (% by wt): (a) Si : 2 - 6, Mg less than 0.40, Cu less than 0.30, Zn less than 0.30, Fe less than 0.50, Ti less than 0.30; (b) at least one element destined to reduce sticking on the mould, such as Mn (0.3 1%), Cr (0.1 - 0.3), Co (0.1 - 0.3), V (0.1 - 0.3) or Mo (0.1 - 0.4); (c) at least one element for eutectic modification, such as Sr (50 - 500 ppm), Na (20 - 100 ppm) and Ca (30 - 120 ppm); (d) other elements less than 0.05 each and less than 0.10 in total; (e) the remainder being aluminum. |
