Production method of high-performance aluminum alloy rod

Abstract

The invention discloses a production method of a high-performance aluminum alloy rod. The production method includes the following steps that Al99.70 and Al99.85 remelting aluminum ingots are used in cooperation to be put into an aluminum smelting furnace for smelting; obtained smelted molten aluminum is transferred and poured into a heat preservation furnace to be evenly stirred and sampled for quick analysis through a direct-reading spectrometer, and the content of Al, Si and Fe in a solution and the content of Mn, Cr, Ti and V in the solution are detected; and a boron aluminum intermediate alloy and an aluminum cerium rare earth intermediate alloy are added into the molten aluminum obtained after smelting, the temperature of the molten aluminum in the heat preservation furnace is controlled to be 740+ / -10 DEG C, hand stirring and electromagnetic stirring are carried out for 20 minutes, alloy molten aluminum is obtained, wherein in the alloy molten aluminum, the Al is larger than or equal to 99.82 wt.%, the Si is smaller than or equal to 0.04 wt.%, the Fe ranges from 0.08 wt.% to 0.12 wt.%, the sum of the Mn, the Cr, the Ti and the V is smaller than 0.01 wt.%, the Ce ranges from 0.01 wt.% to 0.05 wt.%, and the ratio of Fe to Si is larger than or equal to 2.0. According to the production method, needle-like crystals are reduced, spheroidal crystals are increased, high purity aluminum dendritic structure coarsening is effectively controlled, the high purity aluminum mechanical property is improved, and the aluminum conductor extension strength and elongation are improved.

Description

technical field [0001] The invention relates to a manufacturing process of an aluminum alloy rod, in particular to a production method of a high-performance aluminum alloy rod. Background technique [0002] At present, 5154 alloy wire is widely used in cable TV coaxial cable and communication cable braided shielding due to its low density, high strength and a series of excellent comprehensive properties such as strong plasticity, electrical conductivity, corrosion resistance and winding resistance. Network cables and military industry and aerospace fields. However, the 5154 aluminum alloy wire rod produced by the current technology level casting method has problems such as low strength of the alloy wire and high wire breakage rate in the development of the direction of Φ0.10mm or less and even ultra-fine, which greatly affects the aluminum alloy cable. The enterprise develops in the direction of ultra-strong and ultra-fine. [0003] Overhead power transmission wires are ge...

AI Technical Summary

Problems solved by technology

However, the 5154 aluminum alloy wire rod produced by the current technology level casting method has problems such as low strength of the alloy wire and high wire breakage rate in the development of the direction of Φ0.10mm or less and even ultra-fine, which greatly affects the aluminum alloy cable. The enterprise develops in the direction of ultra-strong and ultra-fine

[0003] Overhead power transmission wires are generally composed of conductor materials and reinforcing materials. At present, the domestically developed high-conductivity wire products: steel core soft aluminum stranded wire, stress transfer type extra strong steel core soft aluminum stranded wire, composite core soft aluminum double capacity Wires, etc., mainly adopt the annealing process for the aluminum conductor after wire drawing, and replace the electrical hard aluminum with soft aluminum, and the conductivity of the conductor can be increased from 61% IACS to 63% IACS. However, the conductivity of the annealed soft aluminum conductor can be obtained. has been improved, but the tensile strength is greatly reduced, from 160-200 MPa in the original duralumin to 60-98 MPa, which cannot meet the requirements of GB / T 17048-2009 duralumin wire for overhead conductors. The aluminum conductor has defects such as low strength and surface hardness, and it is easy to scratch the surface of the conductor during laying-out construction, so the requirements for the construction and operation of the conductor are relatively high

Therefore, it is not suitable for large-span, high-voltage or ultra-high-voltage transmission projects

Images