Preparation method of 1xxx/7xxx aluminium-alloy composite material

Abstract

The invention discloses a preparation method of a 1xxx / 7xxx aluminium-alloy composite material. The preparation method comprises the following steps of: (1) preparation of a core-layer alloy casting plate and a coating-layer alloy casting plate; (2) surface treatment: respectively carrying out surface treatment on the core-layer alloy casting plate and the coating-layer alloy casting plate obtained in the step (1); (3) welding fixation: carrying out welding fixation on the core-layer alloy casting plate and the coating-layer alloy casting plate after surface treatment in the step (2) accordingto a coating-layer / core-layer combined mode; (4) preheating and hot rolling: preheating the alloy casting plate welded in the step (3), carrying out hot-rolling bonding and following machining according to the thickness of a finished product after the heating is finished to obtaining a product. The preparation method disclosed by the invention has the beneficial effects that two layers of aluminium-alloy composite plates have the characteristics of high hardness and high strength, meanwhile the anodic oxidation effect of an electronic product is obviously improved, so that after the anode ofthe electronic product is oxidized and colored, the surface has metallic luster and is uniform in color.

Description

technical field

[0001] The invention relates to a preparation method of an aluminum alloy composite material, in particular to a preparation method of a 1xxx / 7xxx aluminum alloy composite material. Background technique

[0002] With the rapid development of electronic products, electronic products such as smart phones, tablet computers and digital cameras are required to develop in a light and thin direction. At the same time, higher requirements are put forward for the performance (such as strength) and aesthetics (such as anodized coloring) of electronic products. Substituting aluminum alloys for steel and plastic to prepare product appearance parts is the main solution chosen by most 3C electronics manufacturers for the above-mentioned development trends. At present, the widely used aluminum alloys include three series of alloy products: 5xxx, 6xxx, and 7xxx. : The 5xxx series alloys are the earliest to be used, and their anodic oxidation effect is good, but the hardness...

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