According to recent foreign media reports, the Russian State Research University of Science and Technology and the Krasnoyarsk (Klasnoyarsk) Magnet Dynamics Science production Center have jointly developed a new process to prepare a unique and unprecedented high-strength special heat-resistant conductive aluminum alloy to replace the more expensive and heavier copper wires used in aeronautics and spacecraft and high-speed rail. In this new process, the wire billet with diameter 10mm is first cast by electromagnetic mold casting, and then treated at 400 ℃ to obtain stable structure. The thermal stability of aluminum alloy with this structure is higher than that of all existing aluminum alloys, and its excellent properties can be maintained at 250 ℃-300 ℃.
"in the past, attempts have been made to prepare alloys with similar structures and structures using complex and expensive technologies, including ultra-fast melt solidification, powder production and powder metallurgy," said N Belov, a professor in the Department of Metal pressure processing at the Russian State University of Science and Technology. "
After casting, the wire billet is directly rolled and drawn into wire without homogenization annealing, and at the same time, it has been annealed in the processing process, so there are dispersed, nano-sized compound particles containing Cu, Mn and Zr in the alloy structure. This new type of heat-resistant and high conductivity aluminum alloy wire can replace copper wire and is widely used in aerospace and high-speed rail.
