Preparation method of molten-copper-aluminum melt alloy bus

Abstract

The invention provides a preparation method of a molten-copper-aluminum melt alloy bus. The preparation method includes: removing an oxide layer on the surface of an aluminum bar and oxide on the inner wall of a copper tube, and preheating the copper tube; melting the aluminum bar, feeding inert gas, adding rare-earth elements, and performing high-energy ultrasonic treatment; melting the aluminum bar, adding intermediate alloy, fast cooling, preparing semi-solid slurry, and performing heat preservation; placing the preheated copper tube into the female die cavity of a hydraulic machine, quantitatively pouring the semi-solid rare-earth molten-aluminum slurry into the female die cavity, using the hydraulic machine to perform fast extrusion forming through the female die cavity, and performing heat preservation; performing multi-pass continuous rolling, and cooling in the air. The preparation method has the advantages that the mechanical performance of the prepared molten-copper-aluminum melt alloy bus can stably shows excellent combining and tensile properties as compared with that of similar products on the market; the prepared molten-copper-aluminum melt alloy bus is excellent in conductivity, and the measured conductivity of the prepared molten-copper-aluminum melt alloy bus is stably higher than that of the similar products; the preparation method is energy-saving, environmentally friendly and promising in industrial application prospect.

Description

technical field [0001] The invention belongs to the field of electrical alloys, and in particular relates to a method for preparing a copper-aluminum liquid fusion alloy busbar. Background technique [0002] Bus bar refers to products made of high-conductivity copper and aluminum materials to transmit electric energy, and to collect and distribute electric power. The main wire used to transmit electric energy in a power plant or substation. Through it, the electric energy output by the generator, transformer or rectifier is transmitted to various users or other substations. [0003] Copper can provide a stronger conductive effect and is not easily corroded. It has been widely used in electrical and thermal conductor materials, but it is expensive, and my country is not a copper-rich country. Aluminum material has excellent mechanical properties and lower cost than copper, but its electrical conductivity is poor. [0004] As a new type of composite material, copper-aluminu...

AI Technical Summary

Problems solved by technology

In the existing copper and aluminum production methods, such as pouring method, horizontal continuous casting method, extrusion method, hydrostatic extrusion method, casing drawing method, cladding welding method and rolling crimping method, it is difficult to prepare copper and aluminum with relatively large section size. High-performance copper-aluminum composite busbar with large, thin and uniform coating copper layer and complete metallurgical bonding at the copper-aluminum bonding interface

In terms of mechanical properties and electrical conductivity, in reality, it is not yet possible to stably reflect good effects and meet market expectations.

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