Strength at elevated temperature and the aluminum alloy and its production manner null Si which are superior in

摘要

Aluminum alloy having a high thermal conductivity and high temperature strength by addition to the composition adjusted to suppress the decrease of high temperature strength, to reduce the solid solution of the aluminum is therefore possible to minimize the Mn content. 12 to 16% by weight of Si, 0.1~2.5 mass% Ni, 3~5 mass% Cu, 0.3~1.2 mass% Mg, 0.3~1.5 mass Fe %, 0.004-0.02% by mass of P, and includes the following Mn 0 to 0.1% by mass, 0.01 to 0.1 mass% of V, 0 and Zr if necessary further. 01 to 0.6 mass%, 0.01 to 0.2 mass% of Cr, aluminum alloy having a chemical composition comprising one or more types of 0.01 to 0.2 wt% Ti. The molten aluminum alloy having a chemical composition such, it was irradiated with ultrasonic waves at a temperature of liquidus above is produced by casting 100 seconds sonication after completion.