| 摘要 |
PURPOSE: A high strength cast Al alloy and a knuckle for a suspension of a vehicle is provided to improve aluminum alloy comparison intensity by adding magnesium, zinc, copper, niobium and manganese, titanium, and zirconium etc in the main component. CONSTITUTION: A high strength cast Al alloy and a knuckle for a suspension of a vehicle comprises aluminum as main component. High strength cast Al alloy is made from magnesium of 2.0~2.5 wt%, zinc of 5.7~6.7 wt%, copper of 2.0~2.4wt%, niobium of 0.1~0.9 wt%, Magnesium is the solid solution hardening element of aluminum. If the magnesium is excessively added, aciform compound including the Mg3Al 2 is formed. Therefore, the magnesium contained quantity is controlled to 2.0~2.5 wt%. Zinc is the precipitation reinforcing element. |
