Method for preparing multi-grain-size heterogeneous aluminum alloy plate through composite rolling

Abstract

The invention discloses a preparation method for preparing a multi-grain-size heterogeneous aluminum alloy plate through composite rolling. The method comprises the four specific procedures of surfacerolling deformation, homogenizing annealing treatment, non-uniform rolling deformation and recrystallization annealing treatment. According to material performance requirements, computer programmingis utilized, rolling tool paths of different patterns are compiled, and aluminum alloy plates of different thicknesses are obtained; the unequal-thickness aluminum alloy plate are fully annealed, so that the microstructure of the unequal-thickness aluminum alloy plate recovers to an annealed structure before deformation; non-uniform rolling deformation is carried out on the annealed unequal-thickness aluminum alloy plate to obtain an aluminum alloy rolled plate with a flat surface and uniform thickness; and the multi-grain-scale heterogeneous aluminum alloy plate is obtained through recrystallization annealing.

Description

technical field [0001] The invention relates to the field of plastic forming of metal materials, in particular to a method for preparing multi-grain scale heterogeneous aluminum alloy plates by compound rolling. Background technique [0002] Aluminum alloy has low density, light weight, good plasticity, and is easy to process into various profiles. It is widely used in important structural components such as aerospace engines and automobile covers. However, for the aluminum alloy sheet prepared by the ordinary process, the structure is single, and the performance cannot meet the use requirements in some special environments, such as the aluminum alloy panel for automobile application. Although the aluminum alloy prepared by the ordinary process can ensure the lightness of the automobile, it is It cannot meet the high-strength performance of local areas, and it is difficult to achieve the safety performance indicators of auto parts during use. [0003] After searching the li...

AI Technical Summary

Problems solved by technology

However, the stacking technology requires repeated cutting and stacking of the processed plates. For Al alloys, the surface oxide film will have an adverse effect on the interface bonding, greatly reducing the yield

In addition, the stack rolling process is complicated, the production efficiency is low, the thickness of the prepared composite plate is small, the bonding interface is easily oxidized, and the bonding is poor, which also has high requirements for the rolling capacity of the rolling mill.

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