Preparation method of high-strength high-conductivity copper-silver multi-core composite wire

A composite wire, high conductivity technology, used in cable/conductor manufacturing, circuits, electrical components, etc., can solve the problems of small final material size and inability to meet practical engineering applications, and achieve the effect of improving mechanical properties and strength.

Active Publication Date: 2014-02-26
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this type of technology has obtained better material properties, it cannot meet the practical application of engineering due to the small size of the final material (usually the wire diameter is less than 1mm).

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Preparation of copper-silver multi-core composite wire with a specification of Ф2.5mm:

[0027] Step 1. Put a rod of Cu-24Ag alloy with a specification of Ф57.8mm (the mass percentage of Ag in the alloy is 24%, and the balance is Cu) into the first copper tube with a specification of Ф65mm×3.5mm to obtain The ratio of the cross-sectional area of ​​the Cu-24Ag alloy rod to the cross-sectional area of ​​the first copper tube is a copper-silver single-core composite sheath that is 3.9:1, and then the two copper-silver single-core composite sheaths are welded by a vacuum electron beam welder. The end is vacuum electron beam welded; the mass purity of the first copper tube is not less than 99.99%, and the remaining resistivity ratio is not less than 200;

[0028] Step 2. Place the copper-silver single-core composite sheath after vacuum electron beam welding and sealing in step 1 in a vacuum box, and heat it for 3.5 hours at a temperature of 740° C. for solution treatment;

...

Embodiment 2

[0036] Preparation of copper-silver multi-core composite wire with a specification of Ф2.5mm:

[0037] Step 1. Put the Cu-24Ag alloy rod with a specification of Ф71mm into the first copper tube with a specification of Ф80mm×4.4mm, and obtain the ratio of the cross-sectional area of ​​the Cu-24Ag alloy rod to the cross-sectional area of ​​the first copper tube as 3.8:1 copper-silver single-core composite sheath, and then vacuum electron beam welding is performed on both ends of the copper-silver single-core composite sheath with a vacuum electron beam welding machine; the mass purity of the first copper tube is not less than 99.99% %, the remaining resistivity ratio is not less than 200;

[0038] Step 2. Place the copper-silver single-core composite sheath after vacuum electron beam welding and sealing in step 1 in a vacuum box, and heat it for 3.5 hours at a temperature of 745° C. for solution treatment;

[0039] Step 3. Extrude the copper-silver single-core composite sheath ...

Embodiment 3

[0046] Preparation of copper-silver multi-core composite wire with a specification of Ф3mm:

[0047] Step 1. Put the Cu-24Ag alloy rod with a specification of Ф75mm into the first copper tube with a specification of Ф85mm×4.9mm, and obtain the ratio of the cross-sectional area of ​​the Cu-24Ag alloy rod to the cross-sectional area of ​​the first copper tube: 3. 6:1 copper-silver single-core composite sheath, and then use vacuum electron beam welding machine to carry out vacuum electron beam welding on both ends of the copper-silver single-core composite sheath; the mass purity of the first copper tube is not less than 99.99% %, the remaining resistivity ratio is not less than 200;

[0048] Step 2. Place the copper-silver single-core composite sheath after vacuum electron beam welding and sealing in step 1 in a vacuum box, and heat it for 3 hours at a temperature of 750° C. for solution treatment;

[0049] Step 3. Extrude the copper-silver single-core composite sheath after so...

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Abstract

The invention provides a preparation method of a high-strength high-conductivity copper-silver multi-core composite wire. The preparation method comprises the following steps: A, loading a Cu-24Ag alloy rod into a first copper tube, and carrying out solder sealing on two ends of the first copper tube; B, carrying out the solution treatment; C, squeezing; D, carrying out multi-pass drawing, and carrying out the aging treatment in the drawing process, thereby obtaining a copper-silver single-core composite wire; E, sequentially carrying out the sizing cutting, straightening and acid pickling treatment, loading 559 wire bundles into a second copper tube, and carrying out solder sealing on two ends of the second copper tube; F, squeezing; G, carrying out the multi-pass drawing, and carrying out the aging treatment and recrystallization treatment in the drawing process, thereby obtaining the IACS high-strength high-conductivity copper-silver multi-core composite wire with the tensile strength of more than or equal to 920MPa and the conductivity of more than or equal to 70 percent. The prepared copper-silver multi-core composite wire has high strength and high conductivity and can meet the real application requirement in the fields of pulse magnets, contact wires and the like.

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-silver multi-core composite wires. Background technique [0002] Copper-silver alloys with high strength and high electrical conductivity are now commercially available as lead frame materials and contact wires for electrified railways. As one of the core technologies of national economic development, integrated circuit technology has attracted widespread attention in recent years. There have also emerged high-end lead frame material manufacturers represented by Chinalco Luotong and Ningbo Xingye. However, the preparation process usually adopts conventional melting and plastic Processing technology is often limited by high-precision equipment conditions, and there is still a certain gap compared with foreign high-precision and high-performance copper-based lead frame materials. At the same tim...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B13/00
Inventor 梁明徐晓燕王鹏飞焦高峰段颖李成山
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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