Heat treatment technology for markedly raising comprehensive performance of aluminium alloy

Abstract

A heat treatment technology for markedly raising comprehensive performance of aluminium alloy is accomplished by the adoption of the following scheme: carrying out a solid solution treatment on the aluminium alloy, taking the aluminium alloy out of a furnace and carrying out water quenching, and carrying out a pre-aging treatment, cold deformation and a secondary aging treatment. Nanometer-level aging precipitation strengthening phase is formed by the pre-aging treatment, and dislocation configuration generated from the subsequent cold deformation can be changed, so as to improve the strength, ductility and toughness of the alloy; during the cold deformation, nanometer-level atomic clusters will precipitate out from solute atoms precipitated during the pre-aging treatment, or ''pinning'' air mass is formed around the dislocation structure, thus further raising the strength of the alloy. The precipitated precipitation strengthening phase is nanometer level, thus raising the ductility and toughness of the alloy and markedly enhancing the strength of the alloy on the basis of guaranteeing good plasticity. The technological process provided by the invention is simple, is convenient to operate, can be adopted to markedly raise comprehensive performance such as the strength and plasticity of the aluminium alloy and improve the corrosion resistant performance and fatigue resistant performance of the aluminium alloy, and is suitable for industrial application.

Description

technical field [0001] The invention relates to a heat treatment process for aluminum alloys, in particular to a heat treatment process for significantly improving the comprehensive performance of aluminum alloys; it belongs to the technical field of nonferrous metal heat treatment processes. technical background [0002] Improving the strength of materials has always been a core issue in materials research. The strengthening of materials is often accompanied by a sharp decrease in plasticity or toughness, while the strength of high plasticity and toughness materials is often very low. For a long time, the "inverted relationship" of strength and toughness of this material has become a bottleneck restricting the development of materials. In order to enable aluminum alloys to further meet the requirements of higher comprehensive performance, the improvement of the comprehensive performance of aluminum alloys has become a hot spot in the aluminum alloy industry in recent years...

AI Technical Summary

Problems solved by technology

However, these methods are limited to the processing of small-sized samples with complex procedures and high equipment requirements, and cannot meet the production requirements of large aluminum alloy components used in large components, or perform extremely dangerous production operations in liquid nitrogen temperature environments. And the damage to the production equipment is relatively large, and the production cost will be further increased at the same time

All in all, these methods have poor operability in actual industrial applications, and their technical routes are far from meeting the requirements of aluminum alloy large structural parts

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