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

A composite material and nanoparticle technology, which is applied in the field of aluminum-based composite material processing, can solve the problems of unsatisfactory reinforced composite materials, easy aggregation of in-situ nanoparticles, and difficult size control.

Active Publication Date: 2020-12-18
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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

Examples

Experimental program
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Effect test

Embodiment 1

[0030] (1) In-situ preparation of composite materials: 2vol% ZrB with a diameter of 100 mm was prepared by the direct melt reaction method (DMR) and a copper crystallizer 2 / AA6111 composite material semi-continuous casting cast rod, generated ZrB 2 The average particle size of the particles is between 50nm and 80nm.

[0031] (2) Two-stage homogenization treatment: put the cast rod into a resistance furnace for two-stage homogenization annealing treatment at 470°C×3h+545°C×17h, and cool with the furnace.

[0032] (3) Extrusion deformation pretreatment: use 600-mesh sandpaper to remove the oxide skin on the surface of the sample after homogenization treatment, and polish it smoothly, then put the polished and smooth sample into acetone for degreasing treatment, and then wipe it off with alcohol cotton The oxide film on the surface was finally cleaned with ethanol and dried with a hair dryer before use.

[0033] (4) Plastic deformation by hot extrusion: Put the pretreated cast...

Embodiment 2

[0036] The preparation method of the cast rod is basically the same as in Example 1, the difference is that: 1. the research object is different, and the present embodiment is 1vol%Al 2 o 3 / AA6111 aluminum matrix composites, the generated Al 2 o 3 The average particle size of the particles is 70nm-100nm. ②The two-stage homogenization treatment is different: 480℃×2h+540℃×18h. ③The hot extrusion process is different: the extrusion temperature of the cast rod is 400°C, the extrusion speed is 1.5m / min, and the extrusion ratio is 20:1. ④The heat treatment process is different: solution quenching is 550℃×1.5h, pre-aging is 160℃×5min, and artificial aging is 180℃×20min.

Embodiment 3

[0038] The preparation method of the cast rod is basically the same as in Example 1, the difference is that: 1. the research object is different, and the present embodiment is 3vol%TiB 2 / AA6016 Aluminum Matrix Composite, Generated TiB 2 The average particle size of the particles is 50-100nm. ②The two-stage homogenization treatment is different: 465℃×4h+555℃×16h. ③The hot extrusion process is different: the extrusion temperature of the cast rod is 500°C, the extrusion speed is 0.5m / min, and the extrusion ratio is 12:1. ④The heat treatment process is different: solution quenching is 540℃×2h, pre-aging is 160℃×5min, and artificial aging is 175℃×30min.

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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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/05B21C23/08
CPCB21C23/08C22F1/002C22F1/05
Inventor 赵玉涛丁仁发吴继礼陶然赵志豪梁亮
Owner JIANGSU UNIV
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