High-conductivity creep-resistant aluminium alloy cable conductor containing Hf and Ce and preparation method thereof
A technology for cable conductors and high electrical conductivity, applied in the field of aluminum alloy materials, can solve problems such as poor high temperature resistance and creep performance, low electrical conductivity, strength loss, etc., to improve electrical properties and high temperature performance, and improve heat resistance And creep resistance, improve the effect of safety performance
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Embodiment 1
[0041] Put pure aluminum with a mass fraction of 99.99% into the cupola, melt it into aluminum water at 750°C and keep it warm at 700°C, add sodium chloride as a covering agent, and then put in aluminum-iron master alloy, aluminum-copper master alloy, aluminum - Hafnium master alloy, aluminum-boron master alloy and aluminum-cerium master alloy, made into aluminum alloy liquid, adding hexachloroethane as a refining agent, stirring, slag removal, pouring in a mold from 715°C to 150°C, each element The content is (mass fraction): Fe 1.1%, Cu 0.1%, Ce 0.02%, Hf 0.01%, B 0.01%, and the rest is Al. After homogenization treatment at 500°C / 15h, it is cooled to 380°C with the furnace, and extruded in an extrusion die with a mold temperature of 300°C. The extrusion speed is 5m / min, and the extrusion ratio is 25:1. Drawing at a speed of 1 min, annealing at 250°C for 2 hours, and air cooling after taking out the furnace.
Embodiment 2
[0043] Put pure aluminum with a mass fraction of 99.99% into the cupola, melt it into aluminum water at 900°C and keep it warm at 750°C, add a mixed salt of sodium chloride, potassium chloride, calcium fluoride, and sodium carbonate (the mass ratio is 30 :30:25:15) As a covering agent, put in aluminum-iron master alloy, aluminum-copper master alloy, aluminum-hafnium master alloy, aluminum-boron master alloy and aluminum-cerium master alloy in turn to make aluminum alloy liquid, add Hexachloroethane is used as a refining agent, stirred and slag removed, poured in a mold from 725°C to 200°C, the content of each element is (mass fraction): Fe 0.3%, Cu 0.5%, Ce 0.1%, B 0.05%, Hf 0.2%, the rest is Al. After homogenization treatment at 550°C / 10h, it is cooled to 420°C with the furnace, and extruded in an extrusion die with a mold temperature of 420°C. The extrusion speed is 20m / min, and the extrusion ratio is 64:1. Min speed for drawing, annealing at 350 ° C for 1 h, air cooling ou...
Embodiment 3
[0045] Put pure aluminum with a mass fraction of 99.99% into the cupola, melt it into aluminum water at 850°C and keep it warm at 730°C, add a mixed salt of sodium chloride and potassium chloride (mass ratio 1:1) as a covering agent, Put in aluminum-iron master alloy, aluminum-copper master alloy, aluminum-hafnium master alloy, aluminum-boron master alloy and aluminum-cerium master alloy in turn to make aluminum alloy liquid, add hexachloroethane as refining agent, stir, grill The slag is poured from 720°C to 180°C in the mold, and the content of each element is (mass fraction): Fe 0.75%, Cu 0.25%, Ce 0.05%, B 0.03%, Hf 0.1%, and the rest is Al. After homogenization treatment at 530°C / 12h, it is cooled to 400°C with the furnace, and extruded in an extrusion die with a mold temperature of 400°C. The extrusion speed is 15m / min, and the extrusion ratio is 36:1. Min speed for drawing, annealing at 320 ° C for 1.5 h, air cooling out of the furnace.
[0046] The product performance...
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