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Processing method for improving wiredrawing strength of copper alloy

A processing method and technology of copper alloy, applied in the field of processing to improve the strength of copper alloy wire drawing, can solve the problems of frequent wire breakage, affecting processing efficiency, insufficient wire drawing process control, etc., to reduce wire breakage rate, improve elongation and strength Effect

Pending Publication Date: 2021-10-29
诺克威新材料江苏有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the alloy wire used for ultra-fine conductors, its wire diameter often needs to be processed to 0.050mm-0.016mm. The traditional process generally uses direct wire drawing of the cast alloy rod, but in the actual processing process due to the structure of the rod , Insufficient control of wire drawing die ratio and wire drawing process, which leads to frequent wire breakage and greatly affects processing efficiency. To solve this problem, annealing process is widely used to improve its wire drawing performance, and this process will reduce the tensile strength of the final product Strength, can not play the performance of the material itself well

Method used

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  • Processing method for improving wiredrawing strength of copper alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 10 kg of copper-silver alloy wire billet with a silver content of 2% and a wire diameter of 2.6 mm were selected for processing the alloy wire billet.

[0017] (1), carry out vacuum annealing to this copper alloy, the vacuum degree in the annealing process is 2.0 * 10 -2 Pa, the elongation after annealing is 31%;

[0018] (2) Cold-press the annealed copper alloy wire billet to form a flat wire. After cold-pressing, the aspect ratio of the flat wire is 1.6, and the maximum distance between the two curved surfaces of the flat wire that has not been cold-pressed is 3.2mm ;

[0019] (3) Wire drawing processing is carried out on the above-mentioned copper alloy wire billet flat wire. The first mold is matched according to the maximum size of the flat wire of 3.2mm. After wire drawing processing, 0.041mm copper alloy ultra-fine wire is obtained. The 10kg copper-silver alloy did not break during the wire drawing process.

Embodiment 2

[0023] 20 kg of copper-tin alloy wire billets with a tin content of 0.6% and a wire diameter of 2.1 mm were selected to process the alloy wire billets.

[0024] (1), carry out argon protection annealing to this copper alloy, the elongation after annealing is 26%;

[0025] (2) Cold-press the annealed copper alloy wire billet to form a flat wire. After cold-pressing, the aspect ratio of the flat wire is 2.0, and the maximum distance between the two curved surfaces of the flat wire that has not been cold-pressed is 3.5mm ;

[0026] (3) Wire drawing processing is carried out on the above-mentioned copper alloy wire billet flat wire. The first mold is matched according to the maximum size of the flat wire of 3.5mm. After wire drawing processing, 0.022mm copper alloy ultra-fine wire is obtained. The 20kg copper-tin alloy did not break during the wire drawing process.

Embodiment 3

[0030] 10 kg of copper-magnesium alloy wire billets with a magnesium content of 0.4% and a wire diameter of 3.0 mm were selected to process the alloy wire billets.

[0031] (1), carry out ammonia decomposition furnace annealing to this copper alloy, the elongation after annealing is 22%;

[0032] (2) The annealed copper alloy wire billet is cold-pressed to form a flat wire. After cold-pressing, the aspect ratio of the flat wire is 2.2, and the maximum distance between the two curved surfaces of the flat wire that has not been cold-pressed is 3.8mm. ;

[0033] (3) For wire drawing processing of the above-mentioned copper alloy wire billet flat wire, the first mold is matched according to the maximum size of the flat wire of 3.8mm, and 0.031mm copper alloy ultra-fine wire is obtained after wire drawing processing. The 10kg copper-magnesium alloy has a broken wire during the wire drawing process, at 0.036mm.

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Abstract

The invention relates to a processing method for improving the wiredrawing strength of a copper alloy. The processing method comprises the following steps: (1) annealing heat treatment is carried out on a copper alloy wire blank with the wire diameter of 2.0-3.0 mm, and the elongation is greater than 20%; (2) the annealed copper alloy wire blank is subjected to cold pressing, and the length-width ratio after cold pressing ranges from 1.5 to 2.5; and (3) according to the maximum distance between the two cambered surfaces which are not subjected to cold pressing, wiredrawing machining is conducted through a circular die hole. According to the processing method for improving the wiredrawing strength of the copper alloy, under the condition that the wire diameter of a wire rod is large, machining deformation is conducted on the interior of the copper alloy wire rod in advance, then the state that the round wire rod evenly changes from the outside to the inside in the machining process is changed, and finally the purpose of collaborative deformation of the surface and the interior of a material in the wiredrawing machining process is achieved; therefore, the purposes of improving the elongation and strength of the wire rod and reducing wire breakage are achieved.

Description

technical field [0001] The invention relates to the technical field of electronic materials, in particular to a processing method for improving the drawing strength of copper alloy. Background technique [0002] As a typical electronic material, high-strength and high-conductivity copper alloy is an important material basis for the development of modern electronics industry and science and technology. Its excellent flexibility, fatigue life, and electrical properties are widely used in optoelectronics, microelectronics, medical, robotics, aviation, The key basic fields for the development of high-tech fields such as aerospace are also an important support for the development of information technology. For the alloy wire used for ultra-fine conductors, its wire diameter often needs to be processed to 0.050mm-0.016mm. The traditional process generally uses direct wire drawing of the cast alloy rod, but in the actual processing process due to the structure of the rod , Insuffi...

Claims

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Application Information

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IPC IPC(8): B21C37/04C22F1/08C22F1/02
CPCB21C37/047C22F1/08C22F1/02Y02P10/20
Inventor 程赏赐
Owner 诺克威新材料江苏有限公司