Deckel für ein Getriebegehäuse aus einer Aluminiumlegierung mit einem Einsatz

摘要

Thin automobile components, such as a transmission case made of an aluminum alloy, are provided which are less likely to create vibration-derived noise. An aluminum alloy member, with an insert provided therein, possessing improved damping capacity, comprising: an austempered graphite cast iron member inserted into an aluminum alloy with the thickness of a section constituting a product being not more than 6 mm. A process for producing an aluminum alloy member, with an insert provided therein, wherein cooling is performed so as for the temperature of a graphite cast iron material to reach 400 DEG C. or below within 10 sec after pouring of an aluminum alloy. The graphite cast iron material comprises by weight 2.5 to 4.0% of carbon, 2.0 to 3.5% of silicon, 0.1 to 0.8% of manganese, and at least one member selected from the group consisting of 0.1 to 2.0% of copper, 0.1 to 2.0% of nickel, and 0.05 to 0.5% of molybdenum with the balance consisting of iron and unavoidable impurities. The aluminum alloy comprises by weight 2.0 to 4.0% of copper, 7 to 12% of silicon, and not more than 0.3% of magnesium with the balance consisting of aluminum and unavoidable impurities.