Furukawa Electric Review No.56Development of Conductive Aluminum Wires and Electric Wires/Cables With High Cyclic Durability

Akiyoshi Araki, Kaho Miyazaki, Kaho Imai, Yasumichi Cho, Hiroshi Kaneko, Taku Kato, Kazuhiro Koseki, Ryuichi Hashimoto

We have developed a new metallographic crystal structure control technology and a new manufacturing technology that significantly increases the strength and the fatigue durability of aluminum alloy wire materials while making the wire diameters smaller than those of conventional wires utilizing the technologies acquired in the development and the manufacturing of high-performance copper alloy wires and automotive rectangular magnet wires. The developed aluminum alloy wire material achieves the world’s highest strength and a cyclic fatigue life, a high workability, and a high electrical conductivity at the same time, making it suitable for applications that require durability against oscillation, vibration, cyclic motion and manufacturing. Through the development of elemental technologies such as the fine-diameter wire drawing, its twisting, and its coating, we are proceeding with demonstrations of the developed aluminum alloy wire material on its applications in various electric wires and cables. By expanding the range of applications of aluminum electric wires using the developed aluminum alloy wire material, we will contribute to resolving social issues such as energy conservation, decarbonization, resource conservation, labor shortages, and resource exploration.