Furukawa-sky Aluminum Corporation

Yoki Hirano

Ryo Shoji

Toshiya Okada

Takayuki Sotome

A compressor wheel made of a cast aluminum alloy, wherein the cast aluminum alloy contains Cu 1.4 to 3.2 mass %, Mg 1.0 to 2.0 mass %, Ni 0.5 to 2.0 mass %, Fe 0.5 to 2.0 mass %, and at least one selected from the group consisting of Ti 0.01 to 0.35 mass %, Zr 0.01 to 0.30 mass %, Sc 0.01 to 0.8 mass %, and V 0.01 to 0.5 mass %, with the balance being aluminum and inevitable impurities, with the [(Cu content)+0.5&#xd7;(Mg content)] being 3.8 mass % or less, and with a secondary dendrite arm spacing being 50 &#x3bc;m or less, wherein the cast aluminum alloy is being reinforced by a solution treatment and an aging treatment, and wherein the compressor wheel shows good heat resistant strength, and is for use in a turbocharger.

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Tokyo, Japan

Yoki Hirano