7-series aluminum alloy and preparation method thereof

Abstract

The invention discloses a preparation method of a 7-series aluminum alloy. The preparation method comprises the following steps of firstly, melting an aluminum ingot into molten aluminum and then carrying out alloying treatment; then carrying out degassing, refining and slagging off; subsequently casting the alloy melt subjected to degassing and refining continuously; straightening the prepared casting blank, heating the casting blank before the casting blank enters a rolling mill, adopting emulsion for lubrication in the rolling process, and performing rolling to obtain an aluminum alloy; then carrying out finish rolling and quenching on the aluminum alloy obtained through rolling; and carrying out artificial aging treatment on the aluminum alloy subjected to finish rolling and quenching.According to the preparation method of the 7-series aluminum alloy, artificial aging treatment and mixed gas refining treatment are adopted, the efficiency is high, the cost is low, and the prepared7-series aluminum alloy is stable in performance.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy materials, in particular to a 7-series aluminum alloy and a preparation method thereof. Background technique [0002] At present, with the development of conductor alloying, new types of overhead transmission conductors that use aluminum alloy materials as conductor materials and reinforcement materials are increasingly used at home and abroad, and their representative types include all-aluminum alloy stranded wires and aluminum alloy cored aluminum stranded wires. All aluminum alloy stranded wire is composed of the same material, the manufacturing process is very simple, and has many advantages in engineering applications; compared with the traditional steel-reinforced aluminum stranded wire, the aluminum alloy-reinforced aluminum stranded wire can guarantee the strength of the reinforced core material. , can make full use of the conductive performance of the reinforced core aluminum alloy...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, in the process of preparing 7-series aluminum alloys, the refining agent used is selected from solid refining agents or solid-gas mixed refining agents. Since the simple fixed refining agent reacts slowly after use, in the prior art, most of them use Introduce nitrogen or argon for refining treatment, but nitrogen or argon will react with aluminum at 725°C to 730°C to form a large amount of alumina inclusions, so pure refining gas cannot achieve a good refining effect

At the same time, the synergistic effect of various elements in the alloy aluminum alloy is poor, resulting in short life and poor performance of the produced aluminum alloy

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