Manufacturing method of high-strength and high-conductivity Cu-Ag alloy microwire

A manufacturing method and technology of fine wires, applied in the field of new materials, can solve the problems of low yield, difficulty of thin wires, high strength and electrical conductivity, etc., and achieve high material utilization, ensure purity, and improve strength.

Pending Publication Date: 2022-01-25
JIANGXI COPPER TECHNOLOGY RESEARCH INSTITUTE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the Cu-Ag alloy thin wires prepared by various methods on the market mainly have problems such as easy wire breakage during the thinning process, low yield, and difficulty in ensuring high strength and electrical conductivity of the prepared thin wires.

Method used

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  • Manufacturing method of high-strength and high-conductivity Cu-Ag alloy microwire
  • Manufacturing method of high-strength and high-conductivity Cu-Ag alloy microwire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Cu-2Ag alloy Φ0.055mm fine wire preparation, according to the proportion of high-purity electrolytic copper plate (purity greater than 99.95wt%, the same below) into the crucible, high-purity silver (purity greater than 99.95wt%, the same below) into the feeding chamber, the furnace Vacuum degree is 5×10 -2 Pa, the molten copper is heated to 1300°C for 30 minutes, and then silver and lanthanum are successively added from the feeding bin, and the copper-silver alloy casting rod with a diameter of Φ16mm is continuously cast at a speed of 2mm / s. The down-drawing continuous casting rod is extruded into a billet with a diameter of 8mm at a speed of 30mm / s on a continuous extruder, wherein the mold temperature of the continuous extrusion machine is 480°C, and the down-drawing continuous casting rod is not heated. After the continuous extrusion, the rod billet is drawn to 2.6mm through multiple passes; after the large drawing, it is drawn to 0.9mm by multiple passes on the int...

Embodiment 2

[0042] Cu-2Ag alloy Φ0.03mm fine wire preparation, Cu-2Ag alloy Φ0.055mm fine wire preparation, according to the proportion of high-purity electrolytic copper plate (purity greater than 99.95wt%, the same below) into the crucible, high-purity silver (purity greater than 99.95wt%) , the same below) into the feeding chamber, the vacuum in the furnace is 5×10 -2 Pa, the molten copper is heated to 1300°C for 30 minutes, and then silver and lanthanum are successively added from the feeding bin, and the copper-silver alloy casting rod with a diameter of Φ16mm is continuously cast at a speed of 2mm / s. The down-drawing continuous casting rod is extruded into a billet with a diameter of 8mm at a speed of 30mm / s on a continuous extruder, wherein the mold temperature of the continuous extrusion machine is 480°C, and the down-drawing continuous casting rod is not heated. After the continuous extrusion, the rod billet is drawn to 2.6mm through multiple passes; after the large drawing, it i...

Embodiment 3

[0044] Cu-2Ag alloy Φ0.02mm fine wire preparation, Cu-2Ag alloy Φ0.03mm fine wire preparation, Cu-2Ag alloy Φ0.055mm fine wire preparation, according to the proportion of high-purity electrolytic copper plate (purity greater than 99.95wt%, the same below) Put into the crucible, high-purity silver (purity greater than 99.95wt%, the same below) is put into the feeding chamber, and the vacuum in the furnace is 5 × 10 -2Pa, the molten copper is heated to 1300°C for 30 minutes, and then silver and lanthanum are successively added from the feeding bin, and the copper-silver alloy casting rod with a diameter of Φ16mm is continuously cast at a speed of 2mm / s. The down-drawing continuous casting rod is extruded into a billet with a diameter of 8mm at a speed of 30mm / s on a continuous extruder, wherein the mold temperature of the continuous extrusion machine is 480°C, and the down-drawing continuous casting rod is not heated. After the continuous extrusion, the rod billet is drawn to 2....

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Abstract

The invention belongs to the technical field of new materials, and particularly relates to a preparation method of a high-strength and high-conductivity Cu-Ag alloy microwire. The preparation method comprises the following steps: preparing a Cu-Ag alloy cast rod by adopting a down-drawing vacuum casting method; continuously extruding the obtained Cu-Ag alloy cast rod, so as to obtain a rod blank of which the diameter is greater than or equal to 4 mm; and carrying out multi-mold cold drawing on the rod blank and carrying out drawing again after annealing, so as to prepare the Cu-Ag alloy microwire of 0.016-0.055 mm. According to the preparation method, a wire-drawing round rod is prepared through vacuum down-drawing continuous casting and continuous extruding methods; on the one hand, the purity of the round rod is guaranteed; on the other hand, the follow-up wire drawing strength is improved by continuously extruding large-deformation refined crystal grains; the tensile strength of the microwire is higher than or equal to 700 MPa; the electric conductivity is higher than or equal to 75% IACS; the material utilization rate is high; and the industrialized large-scale batch stable production can be achieved.

Description

technical field [0001] The invention belongs to the technical field of new materials, and in particular relates to a method for manufacturing high-strength and high-conductivity Cu-Ag alloy fine wires. Background technique [0002] Cu-Ag alloy has excellent electrical conductivity, thermal conductivity and mechanical properties, and is widely used in the fields of microelectronics, transportation, aerospace and machinery manufacturing. Key materials in machine field products. With the continuous development and upgrading of smart electronic devices and the continuous expansion of 5G application fields, the market demand for high-performance Cu-Ag alloy micro-wires continues to rise, which drives the greater development of Cu-Ag alloy micro-wires. [0003] At present, the Cu-Ag alloy thin wires prepared by various methods on the market mainly have problems such as easy wire breakage during the thinning process, low yield, and difficulty in ensuring high strength and electric...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/04B21C23/08B22D11/04C22F1/08C21D1/26C21D8/06
CPCB21C37/047B21C23/08B22D11/004B22D11/04C22F1/08C21D1/26C21D8/06
Inventor 陈岩赵久辉洪明陈飞鹏张士宏刘昆林毅李怡
Owner JIANGXI COPPER TECHNOLOGY RESEARCH INSTITUTE CO LTD
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