Al/Cu/Mg composite sheet rolling preparation method

Abstract

The invention discloses a Al / Cu / Mg composite sheet rolling preparation method. The method comprises the following steps (1) homogenization treatment is carried out on aluminum alloy or pure aluminum billets, and magnesium alloy billets; (2) slotting is conducted on the corresponding position of the aluminum alloy or the pure aluminum billets, the magnesium alloy billets and a horizontal copper net; (3) oxide layers on the surfaces of the aluminum alloy or the pure aluminum billets, and the magnesium alloy billets are removed, surface coarsen treatment is carried out, then absolute ethyl alcohol is added to an ultrasonic cleaner to clean and dry, and impurities at the composite material interface joints are removed; (4) the billets are stacked in the order of the aluminum alloy or the purealuminum billets, the horizontal copper net, the magnesium alloy billets, the horizontal copper net, the aluminum alloy or the pure aluminum billets, and a vertical copper net is inserted into a stacked billet groove to form composite billets; (5), cold rolling is carried out; (6) hot rolling is carried out; and (7) ply rolling is carried out. The Al / Cu / Mg composite sheet material rolling preparation method can improve the interface bonding strength of a magnesium and aluminum composite plate, and enhance the impact toughness of materials, so that the integrated mechanical performance of composite materials is improved.

Description

technical field [0001] The invention belongs to the technical field of composite material production, and in particular relates to an Al / Cu / Mg composite plate rolling preparation method. Background technique [0002] Magnesium and magnesium alloys have low density (about 1.7g / cm 3 ), is currently the lightest material among metal structural materials, but its corrosion resistance is poor. Aluminum alloy and pure aluminum have good corrosion resistance. In humid air, an oxide film can be formed to prevent metal corrosion. Al / Mg / Al laminated composite material combines the excellent properties of the two alloys, which not only makes up for the shortcomings of the poor corrosion resistance of the magnesium alloy, but also achieves the effect of lightweighting the aluminum alloy or pure aluminum billet, and has broad application prospects. In the composite rolling deformation of magnesium and aluminum at about 420 °C, brittle Mg will appear at the interface junction of lamina...

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Problems solved by technology

In recent years, the research on metal laminated composite materials has mainly focused on how to improve the bonding performance of the metal laminated composite material interface, such as selecting the appropriate surface pretreatment, rolling temperature, reduction rate, rolling speed and rolling Post-heat treatment process, etc., there are few reports on adding an intermediate substance to the interface of magnesium-aluminum plates for rolling to prepare composite materials, so as to enhance the ability of interface bonding and improve the comprehensive mechanical properties of composite materials.

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