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

A high-conductivity and high-strength technology is applied in the field of preparing Cu-Ni-Al conductor materials with high-strength and high-conductivity properties. A wide range of performance, the effect of avoiding oxidation and overburning

Inactive Publication Date: 2011-05-04
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0016] Composition: 0.4% Ni, 0.4% Al, the rest is Cu.

[0017] Preparation method: Put Cu and Al in a vacuum induction furnace, melt them at an atmospheric pressure lower than 0.1Pa, let them stand at 1000°C for degassing, then fill the furnace with Ar to 60kPa, then add Ni and melt them, and stir them evenly Cast into a water-cooled copper mold, and the flow rate of cooling water in the copper mold is 0.1m / s. The ingot was cold rolled to a reduction of 85%, and then aged at 500°C for 0.5h in air cooling.

[0018] Performance: According to the national standard GB / T228-2002, the tensile strength of the alloy is 510MPa, and the conductivity of the alloy at room temperature is 90%IACS according to the four-point method.

Embodiment 3

[0020] Composition: 0.4% Ni, 0.4% Al, the rest is Cu.

[0021] Preparation method: Put Cu and Al in a vacuum induction furnace, melt them at an atmospheric pressure lower than 0.1Pa, let them stand at 1000°C for degassing, then fill the furnace with Ar to 60kPa, then add Ni and melt them, and stir them evenly Cast into a water-cooled copper mold, and the flow rate of cooling water in the copper mold is 0.4m / s. The ingot was cold rolled to a reduction of 95%, and then aged at 200°C for 10 hours in air cooling.

[0022] Performance: According to the national standard GB / T228-2002, the tensile strength of the alloy is 790MPa, and the conductivity of the alloy at room temperature is 70%IACS according to the four-point method.

Embodiment 4

[0024] Composition: 0.4% Ni, 0.4% Al, the rest is Cu.

[0025] Preparation method: Put Cu and Al in a vacuum induction furnace, melt them at an atmospheric pressure lower than 0.1Pa, let them stand at 1000°C for degassing, then fill the furnace with Ar to 60kPa, then add Ni and melt them, and stir them evenly Cast into a water-cooled copper mold, and the flow rate of cooling water in the copper mold is 1.0m / s. The ingot was cold rolled to a reduction of 90%, and then aged at 600°C for 0.2h in air cooling.

[0026] Performance: According to the national standard GB / T228-2002, the tensile strength of the alloy is 900MPa, and the electrical conductivity of the alloy at room temperature is 75%IACS according to the four-point method.

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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 productionflow, 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D8/00C22F1/08C22C9/06C22C9/01
Inventor 刘嘉斌孟亮胡金力秦海英
Owner CHINA JILIANG UNIV
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