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A kind of all-aluminum alloy overhead wire and its preparation method
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An overhead wire, aluminum alloy technology, applied in the direction of metal/alloy conductors, conductors, conductive materials, etc., can solve the problem of inability to take into account electrical conductivity and strength, and achieve the effect of reducing line construction costs, excellent electrical conductivity, and reducing tower height.
Inactive Publication Date: 2018-03-20
HEFEI UNIV OF TECH
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Problems solved by technology
[0006] The purpose of the present invention is to provide a high-strength and high-conductivity aluminum alloy wire and its preparation method for the outstanding problem that the existing overhead wire preparation technology cannot take into account the conductivity and strength.
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Embodiment 1
[0050] The first step: alloy batching, carry out an alloy melting
[0051] 90kg of industrial aluminum (99.99% purity), 0.250kg Al-Si master alloy (20%Si, 80wt%Al), 0.050kg metal Re, 0.090kg Al 2 (SeO 3 ) 3 Powder, 2.5kg Al-Sc master alloy (2wt%Sc, 98wt%Al), 0.030kg Ru lumps are evenly mixed, put into 1# smelting furnace hearth, heat the furnace body to fully melt the material, and heat the aluminum alloy melt After reaching 700-750°C and keeping the temperature for 1 hour, stop heating to obtain a primary alloyed aluminum alloy melt.
[0052] The second step: ball milling Mo and Nb powders, preparing alloying additives, and performing secondary alloying and smelting
[0053] Mix 500g of pure Mo powder and 500g of Nb powder evenly, put them into the stainless steel grinding tank of KQM-X4 planetary ball mill, put in the cemented carbide grinding balls with a diameter of 8mm and 20mm according to the number of 5:1, seal and pass Enter high-purity argon gas (purity is 99.99%...
Embodiment 2
[0073] The first step: alloy batching, carry out an alloy melting
[0074] 90kg of industrial aluminum (99.99% purity), 1kg of Al-Si master alloy (20%Si, 80wt%Al), 0.080kg of metal Re, 0.15kg of Al 2 (SeO 3 ) 3 Powder, 5kg Al-Sc master alloy (2wt%Sc, 98wt%Al), after 0.080kg Ru block is uniformly mixed, pack into 1# smelting furnace hearth, heating body of furnace makes material fully melt, and aluminum alloy melt is heated to 750°C, heat preservation for 1 hour, stop heating, and obtain a primary alloyed aluminum alloy melt.
[0075] The second step: ball milling Mo and Nb powders, preparing alloying additives, and performing secondary alloying and smelting
[0076] Mix 500g of pure Mo powder and 500g of Nb powder evenly, put them into the stainless steel grinding tank of KQM-X4 planetary ball mill, put in the cemented carbide grinding balls with a diameter of 8mm and 20mm according to the number of 5:1, seal and pass Enter high-purity argon gas (purity is 99.99%) to reduc...
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Abstract
The invention provides an all-aluminum alloy overhead conductor and a preparation method thereof. The all-aluminum alloy overhead conductor comprises the components of Al, Mg, Si, Mo, Re, Se, Sc, Nb, Ru and Zr. The Vickers hardness is not less than 100HV, the tensile strength at a room temperature is not less than 330Mpa, elongation is not less than 7%, and electric conductivity is not less than 57% IACS. The long-term using temperature of the all-aluminum alloy overhead conductor is not less than 100 DEG C; and after the conductor is continuously heated for 1 hour at the temperature of 230 DEG C, the strength residual rate is not lower than 85%. The method disclosed by the invention includes the following steps of three times of alloying, modification, melt refining, as-cast rod material annealing treatment, cold drawing and the like, and the product with excellent physical and chemical properties is obtained ultimately. According to the all-aluminum alloy overhead conductor and the preparation method thereof, common industrial-grade aluminum ingots are used as the raw material for production, the production cost is equal to that of a conventional aluminum alloy conductor, and the Vickers hardness, tensile strength at the room temperature, elongation and electric conductivity are enhanced significantly compared with an existing product.
Description
technical field [0001] The invention belongs to the technical field of power transmission equipment, in particular relates to an overhead power transmission wire and its preparation technology, which has high strength and high conductivity, and specifically relates to an all-aluminum alloy wire and a preparation method thereof. Background technique [0002] In recent years, with the continuous, rapid and healthy development of my country's economy, the power industry has developed rapidly as a guarantee for the national economy, gradually forming a strategic pattern of "power transmission from west to east, mutual supply between north and south, and national networking". Long-distance, large-capacity power transmission The construction and reconstruction of the line is also imperative. As the carrier of the transmission circuit, the overhead transmission wire and its infrastructure occupy a very important position in the transmission line. [0003] Most of the wires used in ...
Claims
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Application Information
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