High-strength high-conductivity heat-resistant aluminum alloy wire and preparation method thereof

Abstract

The invention relates to a high-strength high-conductivity heat-resistant aluminum alloy wire. The wire consists of the following raw materials by weight percent: 98.5 to 99.6% of aluminum Al, 0.1 to 0.4% of lanthanum La, 0.1 to 0.4% of cerium Ce, 0.1 to 0.4 % of scandium Sc, 0.01 to 0.2% of Ferrum Fe, 0.01 to 0.1% of silicon Si, and less than 0.01% of titanium Ti, vanadium V, manganese Mn, chromium Cr and other impurity elements all together. Compared with the aluminum alloy wire in the prior art, the aluminum alloy wire of the invention has high strength and high conductivity simultaneously, the tensile strength reaches over 255 Mpa, the electric conductivity can reach over 60.0% IACS (International Annealed Copper Standard), and the high-strength high-conductivity heat-resistant aluminum alloy wire with the heat resistance reaching more than 180 DEG C during long-term running can effectively improve the power transmission capability of conducting wire and simultaneously widen the spacing between conducting wire towers, thereby furthering lowering the investment cost. The aluminum alloy wire has small sag, and the span of an iron tower can be increased by 30% in general. The high-strength high-conductivity heat-resistant aluminum alloy wire can be used in densely populated urban areas. In the process of the invention, both the burning loss of a variety of elements and the oxidation of materials can be reduced by adopting an intermediate frequency furnace for smelting, the smelting time is relatively short so as to raise the productivity, and long-time thermal treatment is not required in the production process, so the cost is saved.

Description

technical field [0001] The invention belongs to the technical field of alloy wire manufacture, and in particular relates to a high-strength, high-conductivity and heat-resistant aluminum wire for transmission lines and a manufacturing process thereof. Background technique [0002] In the past, the main component of wires used as transmission lines in my country was copper. As we all know, my country's copper resources are extremely short, and aluminum resources are very rich. Why do we have to use copper conductors when wires and cables can use copper and aluminum? From a foreign point of view, no country has to use copper conductors like our country. Even for high-voltage and ultra-high-voltage power cables, countless aluminum conductors are used. More than 80% of the wires and cables in France are aluminum conductors, and the aluminum conductors in Japan also account for more than 50%. my country's current application volume is less than 1%. The main reason for this is ...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the existing aluminum alloy wires cannot meet the requirements of high strength, high conductivity and heat resistance at the same time, the present invention provides a new formula of high strength, high conductivity and heat-resistant aluminum alloy wire