Process for manufacturing high bonding strength copper clad aluminum wire

A technology of copper-clad aluminum row and bonding strength, which is applied in the direction of manufacturing tools, metal processing equipment, non-electric welding equipment, etc., can solve the problems of copper-aluminum delamination, low interface bonding strength between copper and aluminum, and poor machinability. Achieve the effect of ensuring reliability and improving interface bonding strength

Inactive Publication Date: 2009-09-23
CNGC YIBIN NORTH XINAN COMPOSITE MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The biggest disadvantage of the copper-clad aluminum bars prepared by the above four methods is that the interface bonding strength between copper and aluminum is low, the machining performance is poor, and copper-aluminum delamination is easy to occur. The requirements for machining technology and equipment are high, and special equipment is required. Cutting, punching, bending and other equipment and tooling
In addition, the copper layer is usually very thin and has poor electrical conductivity

Method used

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  • Process for manufacturing high bonding strength copper clad aluminum wire
  • Process for manufacturing high bonding strength copper clad aluminum wire
  • Process for manufacturing high bonding strength copper clad aluminum wire

Examples

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Effect test

Embodiment 1

[0031] The manufacturing process of the copper-clad aluminum bar with high bonding strength of this embodiment comprises the following steps: 1) explosive welding: as figure 1 As shown, the aluminum plate 2 as the substrate, the support ring 3, the copper plate 4 as the cladding plate, and the explosive 5 are stacked on the foundation 1 from bottom to top, and then the explosive 5 is detonated, and the copper plate 4 hits the aluminum plate 2 at high speed, and the two are welded together. , to obtain the copper-aluminum composite panel blank 6 (such as figure 2 shown); 2) roll the copper-aluminum composite plate into a tubular shape, with the copper layer outside, weld the longitudinal seam, then press and form, carry out stress-relief annealing and polishing at a temperature of 350-450°C and a holding time of 30-60min, and obtain Copper clad aluminum row.

Embodiment 2

[0033] The manufacturing process of the copper-clad aluminum bar with high bonding strength in this embodiment includes the following steps: 1) Explosive welding: on the foundation 1, the aluminum plate 2 as the substrate, the support ring 3, and the copper plate 4 as the cladding plate are stacked sequentially from bottom to top and Dynamite 5 (eg figure 1 Shown), detonate explosives 5 then, copper plate 4 impacts aluminum plate 2 at high speed, the two are welded as a whole, obtain copper-aluminum composite plate blank 6 (such as figure 2 shown); 2) the copper-aluminum composite plate 6 is rolled into a tubular shape, the copper layer 4 is outside, the longitudinal seam is welded, and then the molten aluminum 7 is poured to make a copper-clad aluminum rod (such as image 3 shown), then press molding, stress relief annealing and polishing at a temperature of 350-450° C. and a holding time of 30-60 minutes to obtain a copper-clad aluminum row.

Embodiment 3

[0035] The manufacturing process of the high bonding strength copper-clad aluminum bar of this embodiment includes the following steps: 1) Explosive welding: on the basis, the copper plate as the substrate, the support ring, the aluminum plate as the cladding plate and the explosive are stacked sequentially from bottom to top, and then Explosives are detonated, and the aluminum plate impacts the copper plate at a high speed, and the two are welded together to obtain the copper-aluminum composite plate blank; Figure 4 shown), then folded and pressed in half, with the copper layer on the outside, welded the longitudinal seam, and then carried out stress-relief annealing and polishing at a temperature of 350-450°C and a holding time of 30-60min to obtain a copper-clad aluminum row.

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Abstract

The invention discloses a process for manufacturing high bonding strength copper clad aluminum wire, comprising the following steps: (1) explosive welding: a baseplate, a support ring, a covering plate and explosive are sequentially overlapped from the bottom up on a foundation, wherein one of the baseplate and the covering plate is a copper plate and the other one is an aluminum plate, the explosive is ignited, the covering plate impacts the baseplate at a high speed, and the covering plate and the baseplate are integrated by welding to obtain copper-aluminum composite plate blank; and (2) the copper-aluminum composite plate blank is processed by subsequent processing procedures to obtain the copper clad aluminum wire. The process improves the interfacial bonding strength, the copper layer thickness and the electric conductivity of the copper clad aluminum wire, thereby ensuring the usage reliability thereof.

Description

technical field [0001] The invention relates to a manufacturing process of a copper-clad aluminum row. Background technique [0002] Copper bars are widely used in electrical equipment, but my country is poor in copper and rich in aluminum. Copper-clad aluminum bars reduce the dependence of electrical equipment on copper. Making full use of abundant aluminum resources is an important measure to realize "substituting aluminum for copper". [0003] There are three main technical parameters to measure the performance of copper-clad aluminum bars: interface bonding strength, copper layer thickness, and electrical conductivity. Among them, the interface bonding strength is the most critical parameter, which directly affects its processing performance and reliability. The interface bonding strength and manufacturing Craft has a direct relationship. At present, the processes for preparing copper-clad aluminum bars are as follows: [0004] 1. Cladding welding method [0005] This...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K20/08C21D1/30
Inventor 白建华陈志勇秦建超王正森
Owner CNGC YIBIN NORTH XINAN COMPOSITE MATERIALS
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