Large-capacity non-heat treated high-conductivity aluminum alloy conductive material

Abstract

The invention discloses a large-capacity non-heat treated high-conductivity aluminum alloy conductive material belonging to the technical field of electric wire and cable conductive materials. The aluminum alloy conductive material is mainly composed of the four following elements: aluminum, erbium, yttrium and ferrum, and the mass percent of each element is as follows: the mass percent of the erbium is 0.21-0.30%, the mass percent of the yttrium is 0.26-0.30%, the mass percent of the ferrum is 0.15-0.25%, the mass percent of the impurity silicon is not more than 0.06%, the sum of the mass percent of the impurities including chromium, manganese, vanadium and titanium is not more than 0.012%, and the rest is aluminum. The aluminum alloy conductive material provided by the invention has the tensile strength of more than 160 MPa, the elongation of more than 2.0% and the conductivity of more than 61% IACS. On the aspects of normal temperature mechanics performance and electrical properties, the aluminum alloy conductive material is as good as the duralumin conductive material, even better, and on the aspect of heat resistance, the aluminum alloy conductive material meets the heat resistance requirement of the heat-resisting aluminum alloy conductive material, in comparison with the 60% IACS heat-resisting aluminum alloy conductor, the aluminum alloy conductive material can reduce line loss by 1.5% and get obvious economic benefits.

Description

technical field [0001] The invention belongs to the technical field of wire and cable conductors, in particular to a large-capacity non-heat-treated high-conductivity aluminum alloy conductor material. Background technique [0002] Under the situation of State Grid's "West-East Power Transmission, North-South Mutual Supply, and National Networking", there are more and more long-distance, large-capacity, and high-voltage transmission lines. There are two main forms of large-capacity transmission wires: large-section duralumin wires and high-current aluminum alloy wires. Under the condition of a certain transmission current density, the advantage of increasing the cross-sectional area of ​​the duralumin conductor material to increase the transmission capacity is that the line loss is small, but the problem is that the weight of the wire is large, more conductor materials need to be consumed and a tower with higher strength is required. and fittings, the construction is more d...

AI Technical Summary

Problems solved by technology

Under the condition of a certain transmission current density, the advantage of increasing the cross-sectional area of ​​the duralumin conductor material to increase the transmission capacity is that the line loss is small, but the problem is that the weight of the wire is large, more conductor materials need to be consumed and a tower with higher strength is required. and fittings, the construction is more difficult; under the condition of a certain wire cross section, the advantage of using heat-resistant aluminum alloy wires that can withstand higher current density to increase the transmission capacity is that the strength requirements for pole towers and fittings are lower, and construction is easier. The problem is that the conductivity of the existing heat-resistant aluminum alloy wire is 58% IACS and 60% IACS, which is 1 to 3% IACS lower than that of the hard aluminum wire, which increases the transmission loss