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Preparation method of high-strength and high-conductivity copper alloy

A copper alloy and high-conductivity technology, applied in the field of non-ferrous metal processing, can solve the problems of reducing the electrical conductivity of the alloy, and it is difficult to obtain high-strength and high-conductivity copper alloys at the same time, to achieve increased strength, good industrial application prospects, and good electrical conductivity. sexual effect

Active Publication Date: 2012-12-26
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the supersaturated matrix formed by alloying elements, the precipitated second phase, and the increased grain boundaries during processing, the electrical conductivity of the alloy will be reduced, and it is difficult to obtain high-strength and high-conductivity copper alloys at the same time.

Method used

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  • Preparation method of high-strength and high-conductivity copper alloy
  • Preparation method of high-strength and high-conductivity copper alloy
  • Preparation method of high-strength and high-conductivity copper alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Chromium-zirconium-copper alloy (the composition of chromium Cr 0.5-1.0%, zirconium Zr 0.2-1.0%, lanthanum La 0.1-0.4%, magnesium Mg and other impurity elements figure 1 shown.

[0029] Finally, a high-strength and high-conductivity copper alloy sample is obtained, and the microstructure of the sample is as follows: figure 2 As shown, many dispersed fine grains are formed, the texture type of the sample is {110} type texture, and the Φ cross-sectional view of the spatial orientation distribution of the high-strength and high-conductivity copper alloy crystal is shown in image 3 shown. The tensile strength of the obtained sample is 610MPa, the elongation is 16%, and the electrical conductivity is 83%IACS. For the performance comparison of the obtained samples under different temperature and deformation conditions, see Figure 7 shown.

Embodiment 2

[0031] Chromium-zirconium-copper alloy (the composition of chromium Cr 0.5-1.0%, zirconium Zr 0.2-1.0%, lanthanum La 0.1-0.4%, magnesium Mg and other impurity elements figure 1 shown.

[0032] Finally, a high-strength and high-conductivity copper alloy sample was obtained. The texture type of the obtained sample was {100} texture. Figure 4 shown. The tensile strength of the obtained sample is 635MPa, the elongation is 13%, and the electrical conductivity is 81%IACS. For the performance comparison of the obtained samples under different temperature and deformation conditions, see Figure 7 shown.

Embodiment 3

[0034] Chromium-zirconium-copper alloy (the composition of chromium Cr 0.5-1.0%, zirconium Zr 0.2-1.0%, lanthanum La 0.1-0.4%, magnesium Mg and other impurity elements figure 1 shown.

[0035] Finally, a high-strength and high-conductivity copper alloy sample was obtained, Figure 5 Shown is the EBSD orientation imaging map of high-strength and high-conductivity copper alloy crystals. The tensile strength of the obtained sample is 615MPa, the elongation is 15%, and the electrical conductivity is 87%IACS. For the performance comparison of the obtained samples under different temperature and deformation conditions, see Figure 7 shown.

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Abstract

The invention relates to a preparation method of high-strength and high-conductivity copper alloy. The preparation method comprises the following steps: (1) solid-solution treatment and hot rolling; (2) cold rolling and annealing at a normal temperature; (3) low-temperature treatment; and (4) quick deformation treatment and final annealing. According to the preparation method of the high-strength and high-conductivity copper alloy, low-temperature quick deformation treatment is carried out at a temperature lower than a temperature, at which the copper alloy slips and deforms; compared with a sample piece which is not subjected to low-temperature quick deformation treatment, not only is the strength of the copper alloy improved, but also the conductivity of the copper alloy is kept well. The copper alloy prepared in the invention has performances better than those of the copper alloy which is not prepared by the method in the invention, wherein the tensile strength is bigger than 600 MPa, the elongation is bigger than 10% and the conductivity is higher than 80% IACS (international annealed copper standard).

Description

technical field [0001] The invention belongs to the technical field of non-ferrous metal processing, and in particular relates to a method for obtaining high-strength and high-conductivity copper alloy by adopting low-temperature treatment followed by rapid deformation processing technology. Background technique [0002] my country is a big copper consumer, especially in recent years, with the rapid development of electrified railways and electronic products, the demand for high-strength and high-conductivity copper alloy materials has also become increasingly strong. However, due to the late start of research in the field of high-strength and high-conductivity copper alloy materials in my country, there is a certain gap between the level of research and development and foreign countries. At present, large-scale production has not yet been formed, and most high-strength and high-conductivity copper alloy materials still rely on imports. Therefore, it is of great significance...

Claims

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Application Information

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IPC IPC(8): C22F1/08
Inventor 黄新民吴玉程秦永强王岩舒霞郑玉春曹钧力
Owner HEFEI UNIV OF TECH
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