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Production process of high-strength high-conductivity copper-chromium-zirconium alloy long wire

A preparation process, copper-chromium-zirconium-zirconium technology, is applied in the field of preparation process of high-strength and high-conductivity copper-chromium-zirconium alloy long wire, which can solve problems such as the decline of mechanical properties, achieve the goal of improving mechanical properties, improving mechanical and electrical properties, and relieving stress concentration Effect

Active Publication Date: 2013-09-04
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a high-strength and high-conductivity copper-chromium-zirconium alloy long wire preparation process, which overcomes the shortcoming of the alloy’s mechanical properties declining after welding, and makes it meet the requirements of service conditions

Method used

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  • Production process of high-strength high-conductivity copper-chromium-zirconium alloy long wire
  • Production process of high-strength high-conductivity copper-chromium-zirconium alloy long wire
  • Production process of high-strength high-conductivity copper-chromium-zirconium alloy long wire

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Effect test

Embodiment 1

[0029] Raw materials such as pure copper, copper-chromium master alloy and pure zirconium are used for vacuum smelting. The chemical composition of the alloy is shown in Table 1.

[0030] Table 1 Chemical composition of the alloy (wt.%)

[0031] Alloy

Cr

Zr

Cu

Cu-0.36Cr-0.12Zr

0.36

0.15

margin

[0032] The specific production process such as figure 1 , the actual operation steps are as follows:

[0033] (1) CuCrZr alloy rods (wires) were prepared by hot extrusion for casting ingots, the hot extrusion temperature was 800-900°C, and the holding time was 1-3h (in this embodiment, the hot extrusion temperature was 850°C, and the time was 2h);

[0034] (2) Flash butt welding is used to weld alloy rods (wires). The process parameters of flash butt welding are: flash time 1-3s; flash speed 10-15mm / s; upsetting pressure: 150-200MPa; Amount of 10-15mm (in this example, flashing time 2s; flashing speed 12mm / s; upsetting pressure: 180MPa;...

Embodiment 2

[0047] Raw materials such as pure copper, copper-chromium master alloy and pure zirconium are used for vacuum smelting. The chemical composition of the alloy is shown in Table 3.

[0048]Table 3 Chemical composition of the alloy (wt.%)

[0049] Alloy

[0050] Specific steps are as follows:

[0051] (1) CuCrZr alloy rods (wires) were prepared by hot extrusion for casting ingots. The hot extrusion temperature was 840°C and the holding time was 3h;

[0052] (2) Flash butt welding is used to weld alloy rods (wires). The process parameters of flash butt welding are: flash time 3s; flash speed 10mm / s; upsetting pressure: 150MPa; upsetting allowance 10mm;

[0053] (3) Solution treatment at 950°C for 2 hours, water quenching to room temperature;

[0054] (4) Alloy rods (wires) are subjected to continuous extrusion treatment with an extrusion ratio of 0.64 and water cooled to room temperature;

[0055] During the continuous extrusion process through the continuous extrusio...

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Abstract

The invention relates to the field of high-strength high-conductivity copper-chromium-zirconium alloy, in particular to a production process of a high-strength high-conductivity copper-chromium-zirconium alloy long wire. The process includes the steps of subjecting copper-chromium-zirconium alloy rods (wires) to flash butt welding, subjecting welds and matrix grains to continuous extrusion and refining, and performing cold deforming and ageing. The process has the advantages that mechanical properties of copper-chromium-zirconium alloy matrix and welds are improved, mechanical properties and electrical properties of the welds are close to those of the matrix, the problem that the performance of the copper-chromium-zirconium alloy decreases after welding is solved, and the copper-chromium-zirconium alloy long wire with fine performance is produced. The production process is applicable to high-strength high-conductivity copper-chromium-zirconium alloy, and the diameter of the copper-chromium-zirconium alloy rods (wires) for connection ranges from 10mm to 40mm.

Description

technical field [0001] The invention relates to the field of high-strength and high-conductivity copper-chromium-zirconium alloys, in particular to a preparation process for high-strength and high-conductivity copper-chromium-zirconium alloy long wires. Background technique [0002] Copper-chromium-zirconium alloy is a precipitation-strengthened copper alloy, which is widely used in the fields of electronics and machinery due to its high strength, good electrical and thermal conductivity, and oxidation resistance, as well as high softening temperature and good wear resistance. , and is expected to be used as a new electrified railway contact wire material. With the further development of the demand for copper-chromium-zirconium alloys in different fields, the welding research work of copper-chromium-zirconium alloys is particularly important and urgent. Especially for application environments with high requirements on length, such as contact wires and electric cables, since...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
Inventor 姜海昌封辉戎利建闫德胜赵明久胡小锋宋元元陈胜虎
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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