Copper-clad aluminum alloy composite conducting wire and preparation method thereof

Abstract

The invention relates to a copper-clad aluminum alloy composite conducting wire and a preparation method thereof. The copper-clad aluminum alloy composite conducting wire comprises the following elements in percentage by mass: 0.5 to 1.0 percent of iron (Fe), 0.05 to 0.15 percent of magnesium (Mg), 0.15 to 0.3 percent of copper (Cu), 0.02 to 0.06 percent of boron (B), less than 0.1 percent of silicon (Si) and other impurities, wherein the sum of the contain percentage of manganese (Mn), chromium (Cr) and vanadium (V) in the impurities is less than or equal to 0.05 percent. The preparation method comprises the following steps of continuously extruding aluminum alloy wire poles at low temperature under the horizontal continuous casting by a cladding welding method; directly cladding copper layers outside the aluminum wire poles; and thus preparing the high-strength and high-conductivity copper-clad aluminum alloy composite conducting wire by a multi-stage cold drawing process and a finished product annealing process. The copper-clad aluminum alloy composite conducting wire has the advantages that the mechanical properties and the electric properties of the copper-clad aluminum alloy composite conducting wire are better than those of the conventional copper-clad aluminum and copper-clad aluminum magnesium alloy wires, and the copper-clad aluminum alloy composite conducting wire has the characteristics of high yield, low production cost and the like.

Description

technical field [0001] The invention belongs to the technical field of plastic processing of layered metal materials, and in particular relates to a copper-clad aluminum alloy composite wire and a preparation method thereof. Background technique [0002] Bimetallic copper-clad aluminum wire is a copper layer concentrically coated on the outer surface of the aluminum core wire, so that the two metals form an interatomic metallurgical bond at the interface to form a whole metal wire. Under the premise of ensuring the performance, it can have both. advantages of the metal. Since the 1960s and 1970s, foreign industrialized countries have begun to widely use bimetallic composite wires such as copper-clad aluminum and copper-clad steel. The United States, Japan and other countries have formed large-scale industries, and each has certain characteristic patented technologies. For example, American Copewell Company has its own patented technology called large-scale production of co...

AI Technical Summary

Problems solved by technology

However, whether it is a copper-clad aluminum wire, a copper-clad aluminum-magnesium alloy wire or a copper-clad rare earth aluminum-magnesium alloy wire, the improvement of its strength is achieved by increasing the magnesium content in the core aluminum alloy and increasing the amount of cold-drawing deformation. The increase will inevitably lead to a decrease in conductivity

In addition, for copper-clad aluminum conductors and copper-clad aluminum-magnesium alloy conductors, since the core material is pure aluminum or low-magnesium aluminum-magnesium alloy, the difference in strength between the surface copper and the surface copper increases under high elongation. It is so large that it cannot be drawn into a fine wire (diameter below 0.08mm) after being stretched to a certain size

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