High-strength and high-conductivity copper alloy and applications of alloy as material of contact line of high-speed railway allowing speed higher than 400 kilometers per hour

Abstract

A high-strength and high-conductivity copper alloy and applications of the alloy as a material of a contact line of a high-speed railway allowing a speed higher than 400 kilometers per hour. The copper alloy has the following characteristics: (1) constituents of the copper alloy are in the form of CuXY, X is one or more selected from Ag, Nb and Ta, and Y is one of more selected from Cr, Zr and Si; (2) at a room temperature, the element X in the copper alloy exists in the form of a pure phase and solid solution atoms, the element Y exists in the form of a pure phase and solid solution atoms or a CuY compound and solid solution atoms, the content of the element X existing in the form of the solid solution atoms is lower than 0.5%, and the content of the element Y existing in the form of the solid solution atoms is lower than 0.1%; and (3) the copper alloy exists in the form of long strip rods or lines, the element X in the form of the pure phase is embedded in the copper alloy in the form of fibers disposed in parallel approximately, and the axial direction of the fibers is approximately in parallel with the axial direction of the copper alloy rods or lines; and the element Y existing in the copper alloy in the form of the pure phase or the CuY compound is embedded in the copper alloy in the form of particles. The copper alloy is suitable for being used as a material of a contact line of a high-speed railway allowing a speed higher than 400 kilometers per hour.