Preparation method of high-strength and high-conductivity copper-silver alloy wire

A technology of copper-silver alloy and high conductivity, which is applied in the field of preparation of high-strength and high-conductivity copper-silver alloy wire, can solve the problems of alloy wire strength reduction, deformation recovery, recrystallization, recrystallization, etc., to improve strength and conductivity, High continuous preparation and production, the effect of increasing the contact area

Active Publication Date: 2021-03-16
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process has the following three shortcomings: ① solid solution treatment will lead to a large number of solid solution Ag atoms in the matrix, and the solid solution atoms cannot be completely precipitated during the later aging process
Therefore, a large amount of solid-solution atoms of Ag atoms caused by solution treatment will deteriorate the electrical conductivity of Cu-Ag alloy wire in the later stage.
② During the drawing process, the aging treatment carried out to improve the drawable phase of the wire rod and the aging precipitation strengthening effect of the alloy cannot completely precipitate the solid-solution Ag atoms of the solution treatment, resulting in a high alloy after aging. Solid solubility, in the later large deformation process, it is easy to cause the deformation energy storage of the alloy to increase and recrystallization occurs, which is not conducive to the improvement of the strength of the alloy wire
③Aging treatment after drawing and deformation will lead to partial recovery and recrystallization of the Cu-Ag alloy with large deformation energy storage, resulting in a decrease in the strength of the alloy wire and affecting the final performance of the wire

Method used

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  • Preparation method of high-strength and high-conductivity copper-silver alloy wire
  • Preparation method of high-strength and high-conductivity copper-silver alloy wire
  • Preparation method of high-strength and high-conductivity copper-silver alloy wire

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Experimental program
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Effect test

Embodiment 1

[0027] Step 1. The alloy composition is 4.5 wt.% Ag, and the balance is Cu, wherein the purity of Ag and Cu are both above 99.95 wt.%. Put the raw materials into the feeding bin and vacuum melting furnace, vacuumize the feeding, melting chamber, and heat preservation chamber to 0.08Pa, fill in argon to 0.9MPa, start the melting furnace power supply for melting, and the melting temperature is 1150℃± 10°C. After it is completely melted, pour it into the holding furnace for heat preservation. The heat preservation temperature is 1150°C±5°C.

[0028] Step 2. Use a horizontal continuous casting device to carry out horizontal continuous casting of φ8mm Cu-Ag alloy rods. The traction temperature is 1150°C±5°C, the horizontal traction speed is 10mm / s, the pitch is 5mm, the pause time is 0.2s, and the cooling water flow rate is 100L / min, the cooling water inlet temperature is 37°C. Such as figure 1 It is shown that by controlling the cooling intensity of vacuum continuous casting C...

Embodiment 2

[0033] Step 1. The alloy composition is 8.0 wt.% Ag, and the balance is Cu for batching, wherein the purity of Ag and Cu are both above 99.95wt.%. Put the raw materials into the feeding bin and vacuum melting furnace, evacuate the feeding, melting chamber, and heat preservation chamber to 0.1Pa, fill the argon gas to 0.95MPa, start the melting furnace power supply for melting, and the melting temperature is 1140℃± 10°C. After it is completely melted, pour it into the holding furnace for heat preservation. The heat preservation temperature is 1140°C±5°C. After the melt is melted and before it is poured into the holding furnace, the melting chamber is subjected to two cycle operations of "independently vacuuming to 0.1Pa and filling with argon to 0.95MPa".

[0034] Step 2. Use a horizontal continuous casting device to carry out horizontal continuous casting of Cu-Ag alloy rods with a diameter of 20 mm. The pulling temperature is 1140°C±5°C, the horizontal pulling speed is 2 mm / ...

Embodiment 3

[0039] Step 1. The alloy composition is 2.0 wt.% Ag, and the balance is Cu, and the purity of Ag and Cu are both above 99.95wt.%. Put the raw materials into the feeding bin and vacuum melting furnace, vacuumize the feeding, melting chamber, and heat preservation chamber to 0.05Pa, fill in argon gas to 0.85MPa, start the melting furnace power supply for melting, and the melting temperature is 1170℃± 10°C. After it is completely melted, pour it into the holding furnace for heat preservation. The heat preservation temperature is 1160°C±5°C. After the melt is melted and before it is poured into the holding furnace, the melting chamber is subjected to a cycle of "independently vacuuming to 0.05Pa and filling with argon to 0.85MPa".

[0040] Step 2. Use a horizontal continuous casting device to carry out horizontal continuous casting of Cu-Ag alloy rods with a diameter of 16 mm. The traction temperature is 1160°C±5°C, the horizontal traction speed is 6 mm / s, the pitch is 4 mm, the ...

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Abstract

The invention discloses a preparation method of a high-strength and high-conductivity copper-silver alloy wire. The alloy mainly comprises 0.2 to 8.0 percent by weight of Ag, not more than 0.1 percentof impurities and the balance of Cu. The preparation method sequentially comprises the steps of vacuum melting, vacuum continuous casting, aging and multi-pass drawing. By means of the technology, the content of solid solution Ag atoms in the alloy can be well controlled, and meanwhile, nano Ag is separated out, so that the dislocation density of the alloy is improved, and the alloy obtains the maximum separation strengthening and dislocation strengthening effects. Compared with a traditional method that solid solution is conducted firstly and then aging is conducted, the preparation method provided by the invention has the advantages that the mechanical property of the Cu-Ag alloy is guaranteed, meanwhile, higher electrical conductivity can be obtained, the mechanical property and the electrical conductivity of the prepared copper-silver alloy wire are well matched, the technological process is shortened, and the production cost is reduced.

Description

technical field [0001] The invention belongs to the field of nonferrous metal processing, and in particular relates to a preparation method of high-strength and high-conductivity copper-silver alloy wire. Background technique [0002] With the development of information and intelligent society, the demand for electromagnetic wire in the fields of electronics and medical products is increasing. Cu alloy has high electrical conductivity and elongation, but the strength is too low to meet the quality requirements in the winding coil and wire drawing process. Microalloying is an important way of alloy strengthening. Adding Ag to Cu alloy can greatly increase the strength of the alloy while retaining the high electrical conductivity of the alloy. Due to the coil materials used in strong magnetic fields and strong magnets, they need to withstand strong Loren magnetic force during use, so the electromagnetic wire must have a high tensile strength. In order to avoid a large amount...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/00C22C1/02B22D11/055C22F1/08
CPCC22C9/00C22C1/02B22D11/055C22F1/08
Inventor 陈辉明汤林胜罗鑫谢伟滨肖翔鹏汪航杨斌
Owner JIANGXI UNIV OF SCI & TECH
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