Heat resistant aluminum alloy conductor material and preparation method thereof

Abstract

The invention provides a heat resistant aluminum alloy conductor material and a preparation method thereof. The heat resistant aluminum alloy conductor material comprises the following components of 0.06-0.15 % of zirconium, 0.15-0.30 % of erbium, 0.10-0.20 % of iron, less than 0.05 % of silicon, less than 0.01 % of inevitable impurities like titanium, vanadium, chromium, manganese and the like and the balance of aluminum. According to the preparation method, the heat resistant aluminum alloy conductor material is directly rolled after each component is fused and cast. The conductor material can realize that the electric conductivity can reach 59.5-60.5 % IACS (International Association Of Classification Societies), the long-term heat resistance temperature can reach 180 DEG C and the short-term heat resistance temperature can reach 210 DEG C without heat treatment; therefore, the conductor material is an electric wire and cable conductor material with great potential. The conductor material can be widely used for construction and capacity expansion reconstruction of electric power engineering; and by using the conductor material, the transmission line capacity is largely increased, the transmission line loss is reduced, the distance between poles of the transmission line can be increased, the line building cost is reduced, the tense corridor resources are saved and obvious economic benefit and energy-saving and environment-friendly significance are obtained. The heat resistant aluminum alloy conductor material provided by the invention has the advantages of reasonable component mixing ratio, simple preparation process, convenience for realizing continuous production and suitability for industrial application; and the production cost and the energy consumption of the heat resistant aluminum alloy can be effectively reduced.

Description

technical field [0001] The invention relates to a conductor material for electric wires and cables, in particular to a heat-resistant aluminum alloy conductor material and a preparation method thereof, belonging to the technical field of alloy materials. Background technique [0002] With the increase of power grid load, power transmission is developing in the direction of high voltage, large capacity, and long distance, which puts forward strict requirements on the transmission wire. Transmission efficiency, on the other hand, requires that the transmission wire has good heat resistance and anti-sag characteristics, so as to reduce the cost of line construction and save the tight corridor resources. However, the conductivity and heat resistance of aluminum conductor materials are a pair of contradictions, and the two are often caught in the dilemma of trade-offs, which is the technical bottleneck for the development of heat-resistant aluminum conductor materials. [0003] ...

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Problems solved by technology

Er is a hotspot in the research of aluminum alloy microalloying. Chinese patent CN 101418401B discloses an Al-Er alloy wire material, which shows that adding an appropriate amount of Er to pure aluminum can increase the hardness of the alloy while maintaining a high electrical conductivity. However, The patent does not demonstrate the beneficial effect of Er on heat resistance

Zr is the most commonly used microalloying element in heat-resistant aluminum conductor materials. Chinese patent CN 1924053A discloses a high-conductivity super-heat-resistant aluminum alloy wire containing Zr. The amount of Zr added is several times that of ordinary heat-resistant alloy wires. When the addition of Zr is too high, the conductivity will be significantly reduced, and part of the solid solution Zr can be precipitated by long-term heat treatment, forming a dispersed Al in the matrix. 3 Zr metal compound can reduce the harmful effect of Zr on conductivity and improve heat resistance. Therefore, the production of the high-conductivity super heat-resistant aluminum alloy wire must be heat-treated at a certain temperature for a long time, and the energy consumption is high and it is difficult to achieve continuous production. Production

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