A kind of impact-resistant aluminum alloy composite plate and its preparation method

Abstract

The invention relates to an impact-resistant aluminum alloy composite plate and a preparation method thereof. The impact-resistant aluminum alloy composite plate includes a first aluminum alloy layer, an aluminum alloy connecting layer, a second aluminum alloy unit, an aluminum alloy connecting layer, and a second aluminum alloy layer connected in sequence, and the second aluminum alloy unit includes One or more second aluminum alloy layers connected by the connection layer; the thicknesses of the first aluminum alloy layer, the second aluminum alloy layer and the aluminum alloy connection layer are respectively 8-15%, 85-92%, and 1-5%. The preparation method provided by the invention can prepare an aluminum alloy composite plate with a component layer ratio of 20% to 40%, and the aluminum alloy composite plate has high strength and excellent impact resistance.

Description

technical field [0001] The invention relates to the field of preparation of aluminum alloy materials, in particular to an impact-resistant aluminum alloy composite plate and a preparation method thereof. Background technique [0002] With the development of high-speed, low-cost, and lightweight industrial applications such as automobiles, rail transit, construction, aerospace, and military, traditional steel materials are gradually being replaced by aluminum alloys and aluminum alloy composite materials. The mechanical properties of aluminum alloy composites put forward higher requirements. For example, in extreme cases, such as high-speed impact, collision, explosion and other instantaneous impact dynamic loads, the material must have a comprehensive matching of high strength and good plasticity and toughness to ensure the material's resistance to high-speed impact damage, so that Ensure the safety of relevant personnel and the reliability of equipment. [0003] At presen...

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Problems solved by technology

[0004] However, in the prior art, when preparing aluminum alloy layered composite materials, there are mainly the following problems: (1) It is difficult to control the cumulative rolling process and interface cleaning, it is difficult to realize the continuous production of large-scale aluminum alloy composite plates, and the production efficiency is low. (2) The casting composite method has high requirements on equipment, process level, operation skills and automatic control, especially the need to control the pouring speed to form a stable and good composite interface, and it is difficult to achieve three-layer Mass production of layered composite materials and above

(3) The friction stir welding method has low efficiency when preparing aluminum alloy composite plates. Due to the large difference in physical properties of different materials, the control of process parameters is difficult, and the manufacturing cost is high. It is difficult to prepare composite plates with uniform deformation and thickness greater than 20mm.

Although the strength or plastic toughness of current materials can be close to the performance limit of this material, it is difficult to achieve a high level of comprehensive performance at the same time, resulting in insufficient impact resistance of existing high-strength aluminum alloy materials.

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