Patent ID: 8936688
Filing Date: 2015-01-20
Classification: C22C,C22F

Abstract:
1. A manufacturing method of an aluminum alloy cast having a thermal conductivity of at least 160 W/(m*K), wherein the amount of Si in solid solution within an aluminum matrix is adjusted to 0.5-1.1% by mass, and an area ratio of crystallized products within a metal structure is adjusted to 5-8%, comprising: casting a molten aluminum alloy comprising 6.0-8.0% by mass of silicon, 0.2-0.5% by mass of magnesium, 0.6% by mass or less of iron, titanium and/or zirconium in an amount of 0.03% by the mass or less, the remainder consisting of aluminum and 0.2% by mass or less of elements other than silicon, aluminum, magnesium, and iron, heating and holding said cast aluminum alloy cast for 1 hour or longer at 400-450 degrees Celsius, subsequently cooling said cast aluminum alloy cast by furnace cooling.