A kind of high-conductivity aluminum alloy wire and its preparation method

Abstract

The invention discloses a high-conductivity aluminum alloy wire and a preparation method thereof, relating to the technical field of wires, comprising the following elements in weight percent: 1.15-1.28% of Mg, 1.21-1.35% of Si, 0.33-0.42% of Zr, Y is 0.11-0.15%, Ce is 0.25-0.33%, La is 0.06-0.17%, B is 0.41-0.55%, Cu is 0.61-0.85%, other impurities are less than 0.3%, and the balance is Al; including dehumidification, Smelting, refining, slag removal, heat treatment, casting, rolling, wire drawing and heat treatment steps; the wire has very good electrical conductivity, and its elongation has also been very well improved, meeting the needs of the power industry.

Description

Technical field [0001] The present invention belongs to the technical field of wires, and more particularly to a high conductivity aluminum alloy wire and a preparation method thereof. Background technique [0002] With the rapid development of the national economy and the continuous improvement of the people's living standards, the demand for electricity has grown sharply, and the transmission line has become increasingly developed in the large-capacity direction, which requires an increase in the power capacity of the wire. Aluminum alloy wires can meet the needs of the above use as a special wire. During the electric power transmission, the electrical conductivity of the aluminum alloy wire material has a greater determination effect on the use of the wire made of the wire. Conventional aluminum alloy wires are only 50% IACS, which is not better to meet the needs of electricity transmission, so it is necessary to improve the conductivity of the aluminum alloy wire. [0003] Th...

AI Technical Summary

Problems solved by technology

The conductivity of conventional aluminum alloy wires is only 50% IACS, which cannot meet the needs of power transmission, so it is necessary to increase the conductivity of aluminum alloy wires

[0003] The patent with the notification number CN103045915B discloses a high-conductivity, medium-strength heat-resistant aluminum alloy monofilament and its preparation method. The aluminum alloy wire is composed of the following elements in weight percentage: Zr: 0.05-0.09%, B: 0.05 ~0.15%, Si: 0.01~0.2%, Fe: 0.05~0.3%, Mn: 0.2~0.5%, Er: 0.01~0.15% and / or Y: 0.01~0.15%, also contains V, Ti, Cr elements, the rest are Al and inevitable trace impurities; this patent cancels the heat treatment by adjusting the addition sequence of alloying elements and the holding time, thereby simplifying the preparation process and saving costs, but although the patent improves the conductivity of the wire, but Due to the cancellation of heat treatment in this patent, the mechanical strength of the wire is poor and it is easy to break

[0004] The patent with the notification number CN104674074B discloses a heat-resistant and high-conductivity aluminum alloy wire and its preparation method and application. The aluminum alloy wire produced by this invention includes Mn, Ta, Cr, Ga, Ba, Eu, Dy, Yu The amount is Al; the preparation method comprises the following steps: (1) take the elemental or oxide of the following components, Mn, Ta, Cr, Ga, Ba, Eu, Dy, and the balance is Al; (2) when the temperature in the smelting furnace When the temperature is 725-765°C, put in the mixed ingredients in step (1) and smelt for 3 hours; (3) reduce the temperature in the melting furnace to 630-660°C at a cooling rate of 40°C / min, and then smelt for 2 hours; (4) reduce the temperature of the smelting furnace After the temperature in the furnace is 225-245°C, keep it warm for 2 hours; (5) re-stretch the aluminum alloy material into an aluminum alloy rod, and then draw it into a drawn alloy wire; this patent significantly improves the heat resistance of the aluminum alloy wire, Electrical conductivity and tensile strength, but the patent has very high requirements in the production process. These added elements often form solid solution strengthening. Even if the second phase is formed, it is difficult to form fine dispersion strengthening. As a result, the strength increases and the conductivity decreases.

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