Preparation method of silver clad aluminum composite filament

A technology of silver-coated aluminum and composite wire, which is applied in the field of preparation of bimetal composite microwires, can solve the problems of difficult deformation of silver-coated layer metal, high cost of composite blank preparation, slow flow of silver-layer metal, etc., and achieves low production cost. , reduce friction, improve the effect of bonding strength

Inactive Publication Date: 2016-07-13
罗奕兵
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  • Application Information

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Problems solved by technology

The existing silver-clad aluminum filament preparation methods mainly include hydrostatic extrusion→drawing method (Xie Jianxin, et al.: A high-performance silver-clad aluminum composite wire and its preparation process [P], Chinese patent, Invention patent, patent number: CN200710063256.6, 2007.01.05), the preparation cost of the composite billet produced by this method is relatively high, and due to the large yield strength ratio of silver / aluminum, during hydrostatic extrusion, the silver-coated metal Deformation is difficult, and the metal flow of the silver layer is relatively slow compared to the core layer aluminum, resulting in the cladding silver layer being prone to bamboo-shaped fracture defects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Example 1: Forming process of φ0.08mm silver-clad aluminum composite filament

[0015] 1) Select a φ16mm aluminum core and a silver tube with a transition fit with the outer diameter of the aluminum core. The outer diameter of the silver tube is φ20mm, the length of the silver tube is 200mm, and the length of the aluminum core is 205mm; the inner wall of the silver tube and the aluminum core are degreased and oxidized Finally, dry and assemble in a vacuum operation box. After assembly, give a certain compression deformation to the protruding aluminum core to seal the gap between the silver tube and the aluminum rod and avoid oxidation of the composite interface;

[0016] 2) After the assembled composite billet is heated by medium frequency induction, it is immediately stretched to a φ2mm silver-clad aluminum composite wire by multiple passes, and the section shrinkage rate of each pass is 15~30%, and the lubricant is vegetable oil;

[0017] 4) The φ2mm silver-clad alumi...

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Abstract

A preparation method of a silver clad aluminum composite filament includes 1), selecting an aluminum core and a silver tube in transition fit with the external diameter of the aluminum core, subjecting metal surfaces to deoiling and oxidation film removal, drying and assembling the aluminum core and the silver tube, and sealing two ends of the assembled aluminum core and the silver tube by means of local plastic deformation; 2), subjecting an assembled composite rod to induction heating, and drawing the heated composite rod to form the phi 1-2 mm silver clad aluminum composite filament; 3), when cold deformation is about 95-99% of section shrinkage rate, subjecting the composite filament to annealing treatment at 200-400 DEG C for 0.1-0.5 hour; 4), drawing the silver clad aluminum filament into a phi 0.05-0.5 mm filament under the action of ultrasonic vibration, wherein kerosene or lubricating oil serves as a lubricant, oil temperature ranges from 150 DEG C to 250 DEG C, and vibration frequency of ultrasonic waves is 10-50 Hz.

Description

technical field [0001] The invention relates to a method for preparing a bimetallic composite microfilament, in particular to a method for preparing a silver-clad aluminum composite filament with a circular cross section. Background technique [0002] With the rapid development of electronic information technology, electronic precision instruments and sensors are becoming more and more miniaturized and high-precision, which puts forward higher requirements for the wires used for signal transmission. As the metal with the highest conductivity, silver has a wide range of applications in microelectronics. However, due to the lack of silver resources, the cost of directly using silver wire as a conductive material is high, which is not conducive to its popularization and application. Composite wire has superior performance that cannot be achieved by a single material, and is widely used in various industries. Silver-clad aluminum composite filaments are widely used in high-per...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/04
CPCB21C37/042B21C37/045B21C37/047
Inventor 罗奕兵
Owner 罗奕兵
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