| 摘要 |
PROBLEM TO BE SOLVED: To provide an aluminum alloy material, in a heat sink requiring satisfactory heat radiation, while maintaining its thermal conductivity, having material strength enough for withstanding local pressurization such as bolting, and satisfactory castability at the time of die casting. SOLUTION: The aluminum alloy material for a heat sink has a composition comprising, by weight, 4.5 to 13.5% Si, 0.20 to 0.70% Mg, 0.20 to 1.00% Fe and 0.002 to 0.08% B, and the balance aluminum with inevitable impurities, and also has an electric conductivity of≥38 IACS(International Annealed Copper Standard)% and a Brinell hardness value of≥60. In the method for producing the aluminum alloy material for a heat sink, an alloy in the above compositional range is cast by die casting, and is thereafter subjected to aging heat treatment at 180 to 250°C for 0.8 to 5.0 hr. A heat sink is produced from the alloy material. COPYRIGHT: (C)2006,JPO&NCIPI
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