Manufacture method of medium-strength aluminum alloy wire with electrical conductivity of 59 percent

Abstract

The invention provides a manufacture method of a medium-strength aluminum alloy wire with electrical conductivity of 59 percent. The method comprises the following steps of: A, preparing molten aluminum by selecting an aluminum ingot as a raw material, wherein the aluminum ingot comprises the following impurities in percentage: less than or equal to 0.08 percent of silicon, less than or equal to 0.16 percent of iron, less than or equal to 0.01 percent of copper, less than or equal to 0.015 percent of titanium, vanadium, chromium and manganese, and less than or equal to 0.03 percent of other impurities; B, melting the alloy liquid to realize that the silicon is controlled to be between 0.40 and 0.55 weight percent, magnesium is controlled to be between 0.35 and 0.50 weight percent, and copper is controlled to be between 0.020 and 0.040 weight percent in the alloy liquid; C, casting into an aluminum alloy ingot; D, rolling into a medium-strength aluminum alloy rod; E; drawing into a medium-strength aluminum alloy single wire; and F, twisting to form a medium-strength aluminum alloy wire finished product with electrical conductivity of 59 percent. The medium-strength aluminum alloy wire with electrical conductivity of 59 percent manufactured by adopting the method has higher tensile strength than that of an aluminum wire and higher electrical conductivity than that of a common aluminum alloy conductor, can replace a steel-core aluminum conductor, and can be used as a lead wire of a long-span transmission circuit.

Description

technical field [0001] The invention relates to a wire, in particular to a method for manufacturing a medium-strength aluminum alloy wire with a conductivity of 59%. Background technique [0002] Aluminum alloy wires are usually made of aluminum ingots through smelting, alloying, refining and ordinary continuous casting and rolling to obtain alloy rods, and then wire drawing and heat treatment can meet the mechanical and electrical performance requirements of 60% IACS or more. In order to produce high-conductivity heat-resistant aluminum alloy wire, it is necessary to strictly control the impurity content in the alloy, add trace elements that are beneficial to increase the recrystallization temperature, and adopt a suitable manufacturing process. [0003] The cables in the prior art generally use steel-cored aluminum stranded wires, but with the development of overhead lines to large capacity and ultra-high voltage, the use of split conductors and conductors with large cross...

AI Technical Summary

Problems solved by technology

However, due to the defects of the manufacturing equipment and the instability of the manufacturing process, the main properties (conductivity, tensile strength) of the high-conductivity medium-strength aluminum alloy wire have not yet reached the goal of stable production.

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