HIGH CONDUCTIVE HEAT-RESISTANT ALUMINUM ALLOY

摘要

The invention relates to a heat-resistant aluminum alloy for electrical purpose having high heat resistance and conductivity wherein Al-Zr alloy comprising 0.23-0.35% Zr, the residual part consisting of ordinary impurities and aluminum, is melted, cast and hot rolled in the state of high temperature or continuous heating, the hot rolled alloy being cold worked to a predetermined size and then subjected to ageing treatment at a temperature within the range of 310.degree.C-390.degree.C for 50-400 hours so that A13Zr is dispersed uniformly and in fine particles, further cold working being applied, if necessary, to a degree not exceeding 30% of reduction of area, thereby enabling to obtain a high heat-resistant aluminum alloy for electrical purpose having conductivity in excess of 58%, IACS, same strength as that of 1350 aluminum wire, and 10% softening temperature higher than 400.degree.C at one hour annealing.