▎ 摘　　要

Developing excellent performance conductors with high strength and electrical conductivity is a key issue in the electrical conductor industries. In this paper, an extruded composites containing trace amounts of Sc, Zr and graphene was prepared. Then all samples were extruded into round bars with a final diameter of 6.3 mm. Research results show that the UTS of one stage aging is 1812.7 MPa and the elongation is 21.4%. The hardness increases rapidly from 25.8HB(Brinell hardness) to 69.8HB within the first 12 h when the aging temperature at 280 C. During the secondly stage aging, a peak electrical conductivity of 58.5%IACS(International annealed copper standard, 100%IACS=58.0 MS m(?1)), which is obtained after a secondary aging at 380 C for 48 h. A large number of nano-sized precipitates phase with smaller diameter are uniformly distributed throughout the matrix after aging at 280 C for 24 h. With the increasing of aging time, the size of the precipitates phase increases significantly. This work also provides a good guideline for designing heat-resistant conductors.