Superhigh-strength steel core and high-strength heat-resistant aluminum-alloy conductor used for smart power grids and preparation method thereof

Abstract

The invention discloses an ultra-high-strength steel-core high-strength heat-resistant aluminum alloy wire for smart grids and a preparation method thereof. An ultra-high-strength steel-core high-strength heat-resistant aluminum alloy wire for smart grids consists of 54 single wires with a diameter of 4.33mm The high-strength heat-resistant aluminum alloy wire is concentrically stranded with 19 ultra-high-strength steel cores with a single wire diameter of 2.60mm. The DC resistance of the wire at 20°C is ≤0.0403Ω/km, and the entire tensile force is ≥335.27kN; High-strength heat-resistant aluminum alloy wire at 20°C conductor resistivity ≤0.031065Ω·mm2/m, minimum tensile strength 228-238MPa, elongation 1.8-2.2%, electrical conductivity ≥55% IACS, after 1 hour high temperature treatment at 230°C , the residual rate of tensile strength is more than 90%; the tensile strength of the ultra-high-strength steel core monofilament is more than or equal to 1870MPa, the 1% elongation stress is more than or equal to 1550MPa, and the elongation is more than or equal to 2.0%. The conductor of the present invention has the advantages of high operating temperature of 150°C, large carrying capacity, large breaking force of the whole root, good sag characteristics, etc., and can increase the transmission capacity without replacing poles and towers when applied to long-span transmission lines Doubling, the economic benefits of using the wire are good.

Description

technical field [0001] The invention relates to an ultra-high-strength steel core high-strength heat-resistant aluminum alloy wire for a smart grid and a preparation method thereof. Background technique [0002] At present, the research and development of aluminum alloy conductor materials for overhead transmission lines in my country has shifted from the field of high strength to the direction of heat resistance. And it has developed rapidly and achieved remarkable results. With the rapid development of my country's national economy, the construction of the electric power industry presents a trend of rapid development. Force transmission lines to develop and extend to high voltage, large capacity, and long distance. At the same time, higher requirements are put forward for overhead transmission lines. Only using the high-strength aluminum-magnesium-silicon alloy wires developed and applied earlier can no longer meet the strategic deployment of "power transmission from we...

AI Technical Summary

Problems solved by technology

It is known that the electrical properties and mechanical properties of aluminum alloy wire are mutually restricted. In order to ensure the mechanical properties of aluminum alloy wire, it is necessary to meet the performance of single wire and the

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