Highly conductive heat-resistant aluminum conductor and production process thereof

The invention discloses a highly conductive heat-resistant aluminum conductor and a production process thereof. The highly conductive heat-resistant aluminum conductor is characterized by comprising a bearing core wire and an electric conductor, wherein the bearing core wire is a steel strand fabricated by stranding a plurality of high-strength or ultrahigh-strength steel wires with the tensile strength being equal to or larger than 1560 MPa, the electric conductor is fabricated by stranding highly conductive heat-resistant aluminum round wires and aluminum mold lines with the conductivity being higher than 62 percent IACS (International Annealed Copper Standard) on the periphery of the core wire, the bearing steel core wire is subjected to prestress treatment and has low creep rate and ultrahigh strength, and the electric conductor is subjected to heat treatment at the temperature of not more than 400 DEG C so as to resist heat and enable the strength remaining rate to be higher than 95 percent after being heated at the temperature of 150 DEG C for 1 hour. As a power transmission line, the highly conductive heat-resistant aluminum conductor disclosed by the invention can run at a high temperature of 150 DEG C for a long time, has excellent and high conductivity and good sag property, is applicable to capacitance expansion of newly built transmission lines and old transmission lines, and has the remarkable advantages of high conductivity, heat resistance, good sag property, less loss of transmission lines, smoothness of surface, and high resistance to wind, vibration, freezing, rain and snow.