Direct aging method for preparing high-strength high-conductivity Cu-Ni-Al conductor material

Abstract

The invention discloses a method for preparing a high-strength high-conductivity Cu-Ni-Al conductor material. By taking Cu-0.4 percent (mass percent, the same below) Ni-0.4 percent Al for example, an alloy raw material is smelted and poured into a water-cooled copper mold, is directly subjected to cold rolling to produce certain deformation, and is aged at the temperature of between 200 and 600 DEG C for 0.1 to 10 hours. The strength of the Cu-Ni-Al alloy is 450 to 900MPa, and the conductivity is 70 to 90 percent international annealed copper standard (IACS). The method is short in production flow, simple in process and suitable for large-scale industrial production. Meanwhile, the prepared alloy has a wide performance range, can achieve various strengths and conductivities by adjusting an aging process, and meets the actual requirements of application in various aspects.

Description

technical field [0001] The invention belongs to the field of Cu alloys, and relates to a production method for preparing Cu-Ni-Al conductor materials with high strength and high conductivity. Background technique [0002] High-speed railway is a key development project of my country's Twelfth Five-Year Plan, and its demand for high-performance special copper materials required for high-speed trains and railway electrification is growing explosively. However, the contact wire, one of the key components of the power supply grid, still relies heavily on foreign imports, and has not yet formed independent independent intellectual property rights and related production capacity in China. In order to ensure stable and economical operation of high-speed railways, contact wires are required to have both high electrical conductivity and high strength. Many high-strength and high-conductivity alloy materials have been gradually developed, among which Cu-Cr-Zr alloy has attracted much...

AI Technical Summary

Problems solved by technology

This high-temperature solid solution process consumes a lot of energy and has a long cycle, which is not conducive to the actual production of the alloy.

At the same time, because the Zr element is very active, its density is small, and its melting point is high, it is easy to burn out during the smelting process, so that the actual Zr content of the alloy is low and difficult to control, resulting in a decrease in the performance of the alloy and making it difficult to mass-produce

[0004] Therefore, although the Cu-Cr-Zr alloy exhibits good high-strength and high-conductivity properties, it is still difficult to apply on a large scale.