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Multi-element composite micro-alloying copper alloy with high strength and high conductivity and preparation method thereof

A technology of micro-alloying and copper alloying, applied in the field of high-strength and high-conductivity copper alloy preparation, can solve the problems of insufficient strength, poor plasticity, and difficulty in achieving high-strength and high-conductivity matching, and achieve the control of product performance and plasticity. Excellent, easy-to-operate and mass-produced results

Inactive Publication Date: 2010-01-20
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The electrical conductivity can reach 80-90% IACS, and the hard-state tensile strength is 520-620MPa. However, its disadvantage is that the plasticity is very poor, and the elongation δ 5 only around 2%
The Chinese patent application with the application number 03135189.1 discloses a non-silver-containing rare earth copper-tellurium high-conductivity alloy material. Its disadvantage is that it is difficult to achieve a high-strength and high-conductivity match, especially when the conductivity reaches 94.5% IACS, the strength is obviously insufficient. Only about 330MPa

Method used

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  • Multi-element composite micro-alloying copper alloy with high strength and high conductivity and preparation method thereof
  • Multi-element composite micro-alloying copper alloy with high strength and high conductivity and preparation method thereof

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Experimental program
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Embodiment 1

[0023] (1) Chemical composition (mass fraction, %) of alloy of table 1

[0024] Alloy

Cr

Zr

Te

Cu

Cu-Cr-Zr-Te

0.2-0.8

0.1-0.3

0.1-0.5

Bal.

[0025] (2) Melt copper, chromium, zirconium, and tellurium in a melting furnace according to the contents required in Table 1. After the electrolytic pure copper is completely melted, add industrial pure chromium and zirconium, and then heat up to 1450°C for 20 minutes, and then cool down to 1100°C. Then add commercially pure tellurium and keep it warm for 30 minutes. After the melt is refined and degassed, it is semi-continuously cast into a flat ingot.

[0026] (3) Homogenize the slab at a temperature of 800°C-900°C for 4h-12h, then air-cool. The homogenized ingot is kept at a temperature of 850°C-920°C for 1h-2h, and then the ingot is hot-rolled through multiple passes to about 5mm and air-cooled. When rolling, the hot-rolled plate needs to be annealed at a temperature ...

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Abstract

The invention relates to a composite micro-alloying copper alloy with high strength and high conductivity, containing micro chromium, zirconium and tellurium, and a preparation method thereof. The alloy is prepared from the following components in part by weight: 0.2-0.8 Cr, 0.1-0.3 Zr, 0.1-0.5 Te and the balance of Cu. The preparation method comprises the steps as follows: component preparation; melting; ingot preparation by semi-continuous casting; casting ingot homogenization; hot rolling; solid solution heat treatment; cold rolling; and aging treatment. The finished copper alloy with high strength and high conductivity are superior to prior similar alloy in comprehensive properties, wherein the tensile strength is 500 MPa, the conductivity is 92% IACS, and the thermal conductivity coefficient is 391cm amplitude. The alloy material of the invention can be used as contact alloy material, electrified railway contact net conductors and fittings thereof, large-scale integrated circuit lead frame material, crystallizer material and the like.

Description

technical field [0001] The invention relates to the technical field of preparation of high-strength and high-conductivity copper alloys, in particular to a novel high-strength and high-conductivity copper alloy compounded and micro-alloyed with trace amounts of chromium, zirconium and tellurium. Background technique [0002] Multi-component composite microalloying technology is a research hotspot of high-performance copper alloy materials. Based on Cu-Cr and Cu-Zr alloys, dispersion-strengthened copper alloys can be obtained. The solubility of Cr and Zr in copper is very low at low temperatures, which can ensure the strength of Cu-Cr and Cu-Zr alloys in the annealed state and after dispersion strengthening. High electrical and thermal conductivity. However, in the temperature range of 400-700 °C, Cu-Cr alloy has a plasticity-reduced area-plastic collapse. Studies have shown that the addition of Zr can improve the temperature brittleness and increase the elongation, so as to...

Claims

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Application Information

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IPC IPC(8): C22C9/00C22C1/02B22D11/00C22F1/08
Inventor 姜锋蒋龙尹志民陈小波宋练鹏
Owner CENT SOUTH UNIV
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