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A kind of preparation method of high-strength and high-conductivity copper-silver alloy wire rod

A copper-silver alloy, high-conductivity technology is applied in the field of preparation of high-strength and high-conductivity copper-silver alloy wires, which can solve the problems of deformation recovery and recrystallization, reduction of the strength of alloy wires, recrystallization, etc., and achieves high continuous preparation and production. The effect of improving strength and electrical conductivity, and increasing the contact area

Active Publication Date: 2021-12-21
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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  • A kind of preparation method of high-strength and high-conductivity copper-silver alloy wire rod
  • A kind of preparation method of high-strength and high-conductivity copper-silver alloy wire rod
  • A kind of preparation method of high-strength and high-conductivity copper-silver alloy wire rod

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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 method for preparing a high-strength and high-conductivity copper-silver alloy wire. The alloy mainly consists of 0.2-8.0 wt.% Ag, the total amount of impurities is not more than 0.1%, and the balance is Cu. The steps of the preparation method are: vacuum smelting-vacuum continuous casting-aging-aging-multi-pass drawing. Through this process, the content of solid-solution Ag atoms in the alloy can be well controlled, and at the same time, nano-Ag is precipitated to increase the dislocation density of the alloy, so that the alloy can obtain the maximum effect of precipitation strengthening and dislocation strengthening. Compared with the traditional method of first solid solution and then aging, the preparation method of the present invention not only ensures the mechanical properties of the Cu-Ag alloy, but also obtains higher electrical conductivity, and the mechanical properties and electrical conductivity of the prepared copper-silver alloy wire are improved. A good match is achieved, the process flow 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 Patents(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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