Five-layer aluminum alloy composite material and manufacturing method thereof

Abstract

The invention relates to a five-layer aluminum alloy composite material and a manufacturing method. The five-layer aluminum alloy composite material is used for manufacturing a heat exchanger and comprises a core material layer, middle layers located on the two sides of the core material layer and skin material layers located on the outer sides of the middle layers. The weight percentage of Mn in the aluminum alloy of the core material layer is 1.40-1.90%; and the weight percentage of Mn in the aluminum alloy of the middle layer is 1.40-1.80%. The manufacturing method comprises the following steps: casting, specifically, smelting the skin material, the middle layer and the core material separately into a skin material cast ingot, a middle layer cast ingot and a core material cast ingot according to the weight percentage of each component; performing hot rolling on the leather material and the middle layers; subjecting the core material, the middle layer and the skin material to composite hot rolling, wherein the rolling reduction of the first two bonding passes is controlled to be 0.5-1 mm; conducting cold rolling; and annealing a finished product. According to the five-layer aluminum alloy composite material, the composite interface defects are few, the production efficiency is high, the yield is high and can reach 55%-65%, and therefore the manufacturing cost of the aluminum alloy composite material is greatly reduced.

Description

technical field [0001] The invention relates to the field of metal composite materials, in particular to a material and a composite method of a multilayer aluminum alloy composite material. Background technique [0002] With the application of aluminum alloy composite materials in heat exchangers more and more widely, the performance requirements are also getting higher and higher, especially the strength and corrosion resistance after welding. According to different brazing needs, two-layer and three-layer aluminum alloy composite materials are widely used at present, and four-layer aluminum alloy composite materials are mainly used in relatively high-end products to meet the special needs of high-end products. [0003] In the production process, the more layers of aluminum alloy composite materials, the more complicated the deformation of each metal layer in the rolling composite process, the more difficult the composite processing, the lower the yield, and the higher the ...

AI Technical Summary

Problems solved by technology

However, in the manufacturing process, it is necessary to repeat the hot rolling process of the three materials for 2 to 3 times, and the final composite plate still inevitably produces air bubbles between the core material layer and the middle layer, and between the middle layer and the skin layer Defects, resulting in a low final product rate of only 20-30%; even sometimes in the hot rolling process, the direct rolling fails due to the weak adhesion between the middle layer and the skin layer

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