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A high-strength, high-conductivity, heat-resistant copper alloy material and preparation method thereof

A copper alloy, high-conductivity technology, applied in the field of copper alloy processing, can solve the problems of difficult composition stabilization control, poor performance uniformity, easy burning of Zr elements, etc. The effect of forming and improving mechanical properties

Active Publication Date: 2019-05-03
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Copper-chromium alloy is a typical aging-strengthened copper alloy, and it is an ideal high-strength and high-conductivity copper alloy.
At home and abroad, by adding elements such as Zr, Ag, Nb and In to improve the performance of copper-chromium alloys, a relatively ideal effect has been achieved, but the Zr element is very easy to burn, difficult to smelt, and difficult to control the stability of the composition, resulting in poor performance uniformity , the solution is mainly to adopt vacuum smelting, but this smelting method is not only difficult to industrialize, but also increases the cost; secondly, other additive elements such as Ag, Nb and In belong to precious metals, and their addition further increases the production cost dramatically

Method used

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  • A high-strength, high-conductivity, heat-resistant copper alloy material and preparation method thereof
  • A high-strength, high-conductivity, heat-resistant copper alloy material and preparation method thereof
  • A high-strength, high-conductivity, heat-resistant copper alloy material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] According to the composition of the alloy, it is Cr 0.36wt%, Mg 0.05wt%, Si 0.09wt%, Ni 0.05wt%, Cu99.45wt%, and the covering agent is added, mixed evenly, put into the induction melting furnace, and then in the atmosphere Melting is carried out at a temperature of 1300°C, the covering agent is added again when the metal starts to melt, and mechanical stirring is carried out. After the smelting is completed and the slag is removed, a copper alloy melt with uniform and stable composition is obtained.

[0035] The copper alloy melt is cast at a temperature of 1250°C, and after air cooling, it is subjected to a homogenization annealing treatment for 8 hours under a protective atmosphere and a temperature of 980°C to obtain a homogenized copper-chromium alloy ingot. Such as figure 2 shown. It can be seen from the figure that the internal structure of the ingot is uniform and there is no obvious second phase.

[0036] The homogenized copper-chromium alloy ingot is cooled ...

Embodiment 2

[0041] According to the composition of the alloy: Cr 0.26wt%, Mg 0.17wt%, Si 0.03wt%, Ni 0.03wt%, Ce0.1wt%, Cu 99.41wt%, add the covering agent, mix well and put it into the induction melting furnace , followed by smelting in the atmosphere and at a temperature of 1300°C. When the metal starts to melt, the covering agent is added again and mechanically stirred. After the smelting is completed and the slag is removed, a copper alloy melt with uniform and stable composition is obtained.

[0042]The copper alloy melt was cast at a temperature of 1280°C, and after air cooling, it was subjected to homogenization annealing treatment for 4 hours in a protective atmosphere at a temperature of 920°C to obtain a homogenized copper-chromium alloy ingot.

[0043] The homogenized copper-chromium alloy ingot is cooled to 850°C with the furnace, and then hot-rolled on an ordinary two-roll mill with a deformation of 50%. After air cooling, a hot-rolled plate is obtained. The hot-rolled sheet ...

Embodiment 3

[0047] According to the composition of the alloy: Cr 0.46wt%, Mg 0.11wt%, Si 0.04wt%, Ni 0.05wt%, Ce0.05wt%, Cu 99.29wt%, add the covering agent, mix well and put it into the induction melting furnace , followed by smelting under atmospheric atmosphere and temperature conditions of 1320°C. When the metal starts to melt, the covering agent is added again and mechanically stirred. After the smelting is completed and the slag is removed, a copper alloy melt with uniform and stable composition is obtained.

[0048] The copper alloy melt was cast at a temperature of 1280°C, and after air cooling, it was subjected to homogenization annealing treatment for 3 hours in a protective atmosphere at a temperature of 950°C to obtain a homogenized copper-chromium alloy ingot.

[0049] The homogenized copper-chromium alloy ingot is cooled to 880°C with the furnace, and then hot-rolled on an ordinary two-roll rolling mill with a deformation of 70%. After air-cooling, a hot-rolled plate is obtai...

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Abstract

The invention discloses a high-strength, high-conductivity and heat-resistance copper alloy material and a preparation method thereof. The high-strength, high-conductivity and heat-resistance copper alloy material comprises the following components: 0.2-1.0 wt% of Cr, 0.05-0.2 wt% of Mg, 0.03-0.2 wt% of Si, 0-0.1 wt% of Ni, 0-0.15 wt% of Ce, and the balance of Cu. The preparation method of the copper alloy comprises several steps of smelting-casting-homogenization-hot rolling-solid solution-combination, deformation and heat treatment. On component design of the copper alloy, cheap, easy-added and difficult-burnt elements are adopted to replace easy-burnt elements; through element component design of the alloy, the precipitation sequence of a precipitated phase and the nucleation and growth mechanism are changed, so that the alloy is excellent in high-temperature resistance and softening resistance; and through combination, deformation and heat treatment, the mechanical performance and the electric performance of the alloy are greatly improved, so that the tensile strength of the alloy reaches 530-620 MPa, and the electric conductivity reaches 75-87% IACS. The prepared high-strength, high-conductivity and heat-resistance copper alloy material is suitable for non-vacuum large-scale industrial manufacturing.

Description

technical field [0001] The invention belongs to the technical field of copper alloy processing, and in particular relates to a high-strength, high-conductivity, heat-resistant copper alloy material and a preparation method thereof. Background technique [0002] With the rapid upgrading of the electronics industry and high-speed railways, the demand for high-strength and high-conductivity copper alloys is increasing, especially with the miniaturization of electronic devices and the increase of train speeds to more than 350km / h, copper alloys are required to have higher lightness. and electrical conductivity, while requiring high-strength and high-conductivity copper alloys to have better high temperature resistance and softening resistance. [0003] Copper-chromium alloy is a typical aging-strengthened copper alloy, and it is an ideal high-strength and high-conductivity copper alloy. However, the disadvantage of this alloy is that it is very easy to overage, that is, its soft...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/00C22C1/02C22F1/08C22F1/02
CPCC22C1/02C22C9/00C22F1/02C22F1/08
Inventor 李周肖柱赵子谦龚深赵郅磊
Owner CENT SOUTH UNIV
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