| 摘要 |
<p>An aluminum alloy suitable for machining, said alloy consisting essentially of: about 0.15-1.0 wt.percent copper, about 0.4-1.5 wt.percent tin, about 0.65-1.35 wt.percent magnesium, about 0.4-1.1 wt.percent silicon, about 0.002-0.35 wt.percent manganese, up to about 0.5 wt.percent iron, up to about 0.15 wt.percent chromium and up to about 0.15 wt.percent titanium, the remainder substantially aluminum. On a preferred basis, this alloy contains about 0.45-0.7 wt.percent copper, about 0.9-1.3 wt.percent tin, about 0.7-0.9 wt.percent magnesium and about 0.45-0.75 wt.percent silicon. The alloy is lead-free, bismuth-free, nickel-free, zirconium-free and cadmium-free. There is further disclosed an improved method for making screw machine stock or wire, rod and bar product from this alloy by casting, preheating, extruding, solution heat treating, cold finishing and thermally processing the aforementioned alloy composition.</p> |
