Extrusion process of in-situ nanoparticle-reinforced aluminum matrix composites for vehicle body

Abstract

The invention relates to the field of aluminum base composite material processing, in particular to an extrusion process for a vehicle body in-situ nanoparticles enhancing aluminum base composite material. The vehicle body in-situ nanoparticles enhancing aluminum base composite material synthesized in situ under the outer field control is used as a research object, the casting defects such as holes and loosening are eliminated by adopting the hot extrusion plasticity, so that the texture is refined and dense, the extruded grains are uniform and small, and the mechanical properties are obviously improved; meanwhile, under the action of the extrusion pressure, the agglomeration particles are dispersed and dispersed in a matrix, the bonding force with the matrix is higher, a lot of dislocation is generated, a high-density dislocation mesh is formed, and dislocation enhancement is produced accordingly. The T4P+ artificial aging heat treatment of the follow-up extrusion material can eliminate the thermal residual stress caused by the different thermal expansion coefficients of nanoparticles and matrix in the process of the hot extrusion, the plasticity of the vehicle body extrusion material is further improved, and the vehicle body in-situ nanoparticles enhancing aluminum base composite material extrusion material which can replace the steel plate is obtained.

Description

technical field [0001] The invention relates to the field of processing aluminum-based composite materials, in particular to an extrusion process for in-situ nano particle-reinforced aluminum-based composite materials for vehicle bodies. Background technique [0002] The vigorous development of the world's automobile industry has brought convenience to people's lives, but it has also brought about three major problems: fuel consumption, safety and environmental protection. According to relevant information, under normal circumstances, for every 10% reduction in vehicle weight, fuel consumption can be reduced by 6% to 8%, and emissions can be reduced by 5% to 6%. For every 1 liter reduction in fuel consumption, CO 2 The emission is reduced by 2.45kg. While reducing fuel consumption and saving energy, it also reduces the emission of carbon dioxide and other harmful substances and reduces environmental pollution. At the same time, the weight reduction of automobiles can also ...

AI Technical Summary

Problems solved by technology

However, in-situ nanoparticles are easy to agglomerate and the size is not easy to control, which leads to the unsatisfactory effect of improving the strong plasticity of in-situ nanoparticle-reinforced composite materials. Therefore, the present invention uses hot extrusion plastic deformation to solve these problems.

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