Preparation method of copper-tantalum composite wire with high strength and high conductivity

A composite wire, high conductivity technology, applied in the field of preparation of high-strength and high-conductivity copper-tantalum composite wire, can solve the problems of core wire fracture mechanical properties, reduction and other problems, achieve high shear modulus, reduce deformation, and improve mechanical properties Effect

Active Publication Date: 2018-06-29
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is mainly due to the obvious hardening of the Ta core wire, which leads to the fracture of the core wire and the reduction of mechanical properties.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Step 1. Copper foil of 6.4m (length)×150mm (width)×0.20mm (thickness) and tantalum foil of 6.4m (length)×150mm (width)×0.14mm (thickness) are overlapped and wound on Φ7. On the copper rod of 0mm×150mm, the oxygen-free copper rod is engraved with a groove along the axial direction. The depth of the groove is 3mm and the width is 1mm. It is used for curling, and then the wound copper foil and tantalum foil composite are packed into Φ65mm × 5mm (tube thickness) × 160mm (length) oxygen-free copper tube, and insert a pure copper plunger into the gap between the copper foil tantalum foil composite and the inner wall of the oxygen-free copper tube, the copper foil tantalum foil composite The filling rate of the body in the oxygen-free copper tube reaches 92%;

[0027] Step 2. Carry out vacuum electron beam sealing welding to the two ends of the oxygen-free copper tube and the pure copper plunger loaded in step 1, and the vacuum degree reaches 10 -3 Pa, to obtain the wrapping ...

Embodiment 2

[0033] Step 1. Overlap oxygen-free copper foil of 4m (length)×120mm (width)×0.16mm (thickness) and pure tantalum foil of 4m (length)×120mm (width)×0.08mm (thickness) and wind it on Φ7 On the copper rod of .0mm×150mm, the oxygen-free copper rod is engraved with a groove along the axial direction. The depth of the groove is 2mm and the width is 1mm. Φ45mm×4mm (tube thickness)×125mm (length) oxygen-free copper tube, and insert a pure copper plunger into the gap between the copper foil tantalum foil composite and the inner wall of the oxygen-free copper tube, the copper foil tantalum foil The filling rate of the composite in the oxygen-free copper tube reaches 90%;

[0034] Step 2. Carry out vacuum electron beam sealing welding to the two ends of the oxygen-free copper tube and the pure copper plunger loaded in step 1, and the vacuum degree reaches 10 -3 Pa, to obtain the wrapping body, and then carry out cold isostatic pressing treatment to the wrapping body, the pressure of the...

Embodiment 3

[0040] Step 1. Overlap oxygen-free copper foil of 5m (length)×130mm (width)×0.2mm (thickness) and pure tantalum foil of 5m (length)×130mm (width)×0.12mm (thickness) and wind it on Φ6 On the copper rod of .0mm×130mm, the oxygen-free copper rod is engraved with a groove along the axial direction. The depth of the groove is 3mm and the width is 1mm. Φ55mm×4mm (tube thickness)×135mm (length) oxygen-free copper tube, and insert a pure copper plunger into the gap between the copper foil tantalum foil composite and the inner wall of the oxygen-free copper tube, the copper foil tantalum foil The filling rate of the composite in the oxygen-free copper tube reaches 93%;

[0041] Step 2. Carry out vacuum electron beam sealing welding to the two ends of the oxygen-free copper tube and the pure copper plunger loaded in step 1, and the vacuum degree reaches 10 -3 Pa, to obtain the wrapping body, and then carry out cold isostatic pressing treatment to the wrapping body, the pressure of the ...

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Abstract

The invention discloses a preparation method of a copper-tantalum composite wire with high strength and high conductivity. The method comprises the steps of (1) overlapping a pure tantalum foil and ananaerobic copper foil, jointly winding on a central copper rod, and forming a densely arranged winding copper foil-tantalum foil composite; (2) loading the copper foil-tantalum foil composite into acopper sleeve body, vacuum seal welding, and carrying out isostatic cool pressing treatment and hot extrusion processing, so as to obtain an extrusion composite rod; (3) drawing to obtain a compositecore rod; (4) after sizing and cutting, straightening and acid pickling, loading a multi-core bundle into a copper pipe, carrying out hot extrusion and drawing processing, and cooperating with intermediate annealing, so as to obtain the copper-tantalum composite wire with high strength and high conductivity. According to the preparation method of the copper-tantalum composite wire with high strength and high conductivity provided by the invention, the copper foil and the tantalum foil are selected as raw materials, so that the plastic deformation degree of tantalum is greatly reduced, a Cu / Tainterface is remarkably increased, the advantages of the high shear modulus and the high strength of the tantalum are fully played, the mechanical property of the wire is further improved, and the copper-tantalum composite wire with high strength and high conductivity can be applicable to a high field pulse magnet.

Description

technical field [0001] The invention belongs to the technical field of composite wires, and in particular relates to a preparation method of high-strength and high-conductivity copper-tantalum composite wires. Background technique [0002] High-strength and high-conductivity copper-based composite materials (it is generally believed that the tensile strength of such materials at room temperature is greater than 900MPa, and the conductance is greater than 70% IACS) are the main conductor materials for pulsed strong magnetic fields. The rapid development of materials. International famous strong magnet laboratories have discussed that the performance of the current mainstream copper-niobium and copper-silver materials has gradually approached the limit, which greatly limits the further improvement of high-field pulsed magnets. Scholars are actively exploring a new generation of copper-based composite materials to achieve significant breakthroughs in the strength and electrica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/04B21C23/08B21C1/02
CPCB21C1/02B21C23/08B21C37/045B21C37/047
Inventor 梁明王鹏飞徐晓燕李成山张平祥
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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