Zhejiang University

Litian Wang

Hongtao Wang

Youtong Fang

Jiabin Liu

Liang Meng

Yu Tian

Yuqing Xu

Xiaoyang Fang

Jindong Zhang

A high-efficiency and short-process method for preparing a high-strength and high-conductivity copper alloy is disclosed, comprising the following steps: performing horizontal continuous casting to obtain an as-cast primary billet of copper alloy, wherein the alloying elements in the obtained as-cast primary billet being in a supersaturated solid solution state; after peeling the obtained as-cast primary billet, directly performing continuous extrusion, cold working and aging annealing treatment to obtain a copper alloy, and keeping the alloying elements of the billet in a supersaturated solid solution state during the process of continuous extrusion. The method shortens the flow, reduces energy consumption and improves the product forming rate.

High-efficiency and short-process method for preparing a high-strength and high-conductivity copper alloy

The present invention discloses a super-strong high-conductivity copper alloy and applications thereof as the contact wire materials of high speed railways allowing a speed of over 400 km per hour. The copper alloy comprises niobium, chromium, zirconium, titanium and remaining copper; the copper alloy exists in the form of long bar or wire, wherein niobium is distributed in the copper matrix in the form of nanofibers and solid solution atoms, chromium is distributed around the niobium fibers and the copper matrix in the form of nano-particles and solid solution atoms, zirconium is distributed around the niobium fibers and in the copper matrix in the form of copper-zirconium compound nano-particles and solid solution atoms; titanium is distributed in the copper matrix in the form of copper-titanium GP zone and solid solution atoms; the total amount of niobium, chromium and zirconium solid solution atoms contained in the copper alloy is less than 0.2%.

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

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.

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Hangzhou, China

Litian Wang