High conductivity rare earth hard aluminum conductor and preparation method

Abstract

The invention discloses a high conductivity rare earth hard aluminum conductor which comprises, by weight, 0.0887% to 0.145% of iron, iron with a weight ratio of 1.7 to 2.5 with the silicon, 0.01 % to 0.12 % of boron, 0.01% to 0.15% of gadolinium and aluminum. The invention further discloses a preparation method of the high conductivity rare earth hard aluminum conductor. The preparation method mainly comprises matching aluminum ingots, melting and carrying out boronizing, refining and other processes, the intensity of an obtained hard aluminum conductor is 160Mpa, electric conductivity is 63% IACS, and tensile strength is 160Mpa. Cables produced by utilizing the conductor can continue to be erected by using a traditional construction process, in a line operating process, line loss is reduced, and construction cost is saved.

Description

technical field [0001] The invention relates to an aluminum wire and a preparation method thereof, in particular to a rare earth duralumin wire with high conductivity and a preparation method thereof. Background technique [0002] The overhead transmission wires in my country are mainly steel-cored aluminum stranded wires with aluminum as the conductor and steel core as the supporting member. The conductivity of the aluminum wire used is required to be >61%IACS, and the resistivity is 0.02790~0.028264Ω·mm 2 / m. In response to the policy of “energy saving and emission reduction” for the long-term development of the national industry, the State Grid Corporation of China proposed to build a new type of smart grid that is “resource-saving, environment-friendly, new technology, new material, and new process”. Over the past 30 years, the overhead conductor industry has been continuously developing overhead conductors with higher conductivity to reduce line energy consumption a...

AI Technical Summary

Problems solved by technology

However, although the soft aluminum wire improves the conductivity of the aluminum wire, it also significantly reduces the strength and surface hardness of the aluminum wire, which makes it difficult to deploy during construction. Larger surface scratches will increase the noise of the line running and enhance electromagnetic interference. , Reduce the corona inception voltage, greatly weaken the low-resistance energy-saving effect of the low-resistance annealed aluminum wire

Therefore, although the annealed aluminum wire has been developed for 10 years, it has not been widely promoted so far, and it has only been used in the expansion of a very small number of special lines.