Aluminum alloy ingot and production technology thereof

Abstract

The invention provides an aluminum alloy ingot. The aluminum alloy ingot comprises an aluminum ingot and aluminum plate waste, wherein the mass ratio of the aluminum ingot to the aluminum plate wasteis 4:1-10:1. The invention further provides a production technology of the aluminum alloy ingot. The production technology comprises the following steps that (1) raw materials are smelted, wherein thealuminum ingot and the aluminum plate waste are placed into a smelting furnace for smelting; (2) primary refining and slagging-off are carried out in an upper furnace body; (3) the mixture is put into a lower furnace body for refining and slagging-off; (4) sampling is performed, the content of Si and Mg in molten aluminum is adjusted by adding magnesium ingots and silicon ingots, and step (3) andstep (4) are repeated until the content of each chemical element in the molten aluminum reaches a target value; (5) gas and slag are removed, and the molten aluminum is purified; (6) the molten aluminum is cast into an aluminum bar, and Al-Ti5-B0.2 wires are added in the casting process; (7) high-temperature annealing is carried out; and (8), the head and tail portions of the aluminum bar are cutoff after being discharged from the furnace and cooled. According to the aluminum alloy ingot, the defects of coarse grains and feather-shaped crystals on the edge of the ingot are reduced.

Description

technical field [0001] The invention relates to the technical field of aluminum rod casting, in particular to an aluminum alloy ingot and a production process thereof. Background technique [0002] The 6063 aluminum rod belongs to the low alloyed Al-Mg-Si series high plasticity alloy, which is a heat treatable strengthening alloy with medium strength in the Al-Mg-Si series, and Mg and Si are the main alloying elements. The role and influence of Mg is that Mg and Si form a strengthening phase Mg 2 The higher the content of Si and Mg, the higher the Mg 2 The greater the amount of Si, the greater the strengthening effect of heat treatment, the higher the tensile strength of the profile, but the deformation resistance also increases, the plasticity of the alloy decreases, the processing performance deteriorates, and the corrosion resistance deteriorates. The role and influence of Si is that the amount of Si makes all the Mg in the alloy available as Mg 2 The form of Si exists...

AI Technical Summary

Problems solved by technology

[0003] The existing 6063 material aluminum alloy ingots were subjected to low-magnification microstructure tests after heat treatment, and it was found that there were feathery grains at the 1 / 2 radius of the test piece and serious coarse grains at the edges (such as figure 1 and figure 2 As shown), the grain size and porosity are both high, both of which are grade 2, resulting in more aluminum rod head and tail scrapping, resulting in increased production costs

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