Liquid-solid composite forming copper-clad aluminum bus duct busbar and manufacturing method thereof

Abstract

A liquid-solid composite forming copper-clad aluminum bus duct busbar and a manufacturing method thereof are disclosed, belonging to the field of power supply and distribution. The copper-clad aluminum bus duct busbar is a composite structure, is rectangular and is composed of an aluminum busbar core layer and a clad copper layer; the manufacturing method is implemented by the following steps of: (1) extrusion casting to prepare a blank, (2) intermediate annealing, (3) thermal extrusion and (4) annealing treatment. The manufactured copper-clad aluminum blank has excellent bonding force between the copper layer and the aluminum core and quality of composite material is improved; in the meantime, the plasticity of the busbar is outstanding, which enhances the production efficiency and automatic production level of composite wires; the invention can improve uniformity of the product, plasticity of the thickness and reliability of the bonding as well as has the advantages of high production rate, low material costs, high conductivity of the product and stable electrochemical performances; the invention also has favorable economical benefit and extensive development prospect.

Description

technical field [0001] The invention belongs to the field of power supply and distribution, and particularly relates to a liquid-solid composite formed copper-clad aluminum busway conductive bar and a preparation method thereof. A production process in which a billet is made by a squeeze casting method and then subjected to hot extrusion molding. Background technique [0002] At present, the conductive bars of bus ducts are mostly made of pure copper. Although there are also aluminum bus duct bars, they have not been widely used in practical applications. Compared with the busway conductive bar made of copper and the busway conductive bar made of aluminum, there is a big difference between the two. The difference is mainly reflected in the fact that the busway made of copper has stable electrochemical performance and high conductivity. , Low resistivity and some other advantages. However, pure copper bus duct also has the following disadvantages: [0003] 1. Since copper r...

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Problems solved by technology

[0004] 2. The rapid increase in the price of pure copper has also brought great pressure to the busway industry;

[0005] 3. The density of copper is high, and the weight per unit volume is very large, which brings great inconvenience to installation and maintenance

The electroplating method will cause the copper-clad aluminum busway conductive bar to have a small plastic range and low conductivity; the cost of the raw materials and combined processing investment of the coating method is high; the product quality of the crimping method is unstable and the production efficiency is low; the horizontal continuous casting method product electric Unstable chemical and mechanical properties

These methods cannot meet the needs of customers at all levels to a large extent

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