High strength alloy round aluminium rod and production method thereof

Abstract

The invention provides a high strength alloy round aluminium rod and a production method thereof. Liquid aluminium with the content of more than 99.5% is added into a smelting furnace, the temperature is controlled to be 760-800 DEG C; silicon and magnesium and iron chelating agent are added, wherein the content of Si is controlled to be less than or equal to 0.6%, the content of Mg is controlled to be 0.3-0.9%, and the content of Fe is controlled to be less than or equal to 0.3%; aluminium melt is prepared, nitrogen is utilized to blow powder refining agent into the solution for refining, the usage amount of refining agent is 1.2kg / ton, and the pressure of nitrogen which is led in is 0.05-0.4MPa, thus obtaining aluminium melt with higher purity; and continuous casting and tandem rolling are carried out on aluminium melt subject to standing, before casting, Al-Ti-B rod is added in a chute at the speed of 150mm / min, so as to carry out online grain refinement treatment on the aluminium melt; and the rolled wire is subject to solid solution strengthening by virtue of an atomization quenching channel. Compared with common pure aluminium electrician round aluminium rod, the Al-Si-Mg alloy round aluminium rod of the invention has the advantages that: tensile strength is improved by 56.5%, the maximum can reach 64.6%; corresponding elongation is increased by 200%, the maximum can reach 228%; and resistivity is increased by only 28%.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy materials, in particular to a high-strength alloy round aluminum rod and a production method thereof. Background technique [0002] At present, the production of wires and cables in my country is mainly made of pure aluminum electrical round aluminum rods. Due to the low strength of pure aluminum electrical round aluminum rods and the tensile strength ≤ 140MPa, steel cores are usually added to form steel-cored aluminum stranded wires when making wires and cables. , This will increase the weight of the wire and cable, increase the resistance, and reduce the corrosion resistance, resulting in an increase in the load of the pole, increased line loss, and shortened life, which is not conducive to the realization of high-voltage power transmission with large span and high carrying capacity. High-strength alloy aluminum wire has the characteristics of good heat resistance and large carrying capaci...

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Problems solved by technology

However, domestic mature and industrialized manufacturers of high-strength alloy round aluminum rods do not yet exist. Even the current domestic round aluminum rod production line with the highest level of equipment is imported from Italy’s Continuus by Baotou Aluminum in 2005 and Chinalco Guizhou Branch In 2002, the two continuous casting and rolling production lines imported from Magnesia South Wire Co., Ltd. (Southwire) were unable to purchase alloy formula technology when the equipment was introduced, and did not carry out in-depth research and development on the production process of high-strength alloy round aluminum rods in the later period. The production of high-strength alloy round aluminum rods can only provide pure aluminum electrical round aluminum rod products in the market

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