Study on Precipitation Strengthening and Corrosion Properties of Medium
Release Time:
Mar 26,2021
Aluminum alloy is the preferred metal material for lightweight transportation. 7075 aluminum alloy is a widely used lightweight and high-strength structural material.
Aluminum alloy is the preferred metal material for lightweight transportation. 7075 aluminum alloy is a widely used lightweight and high-strength structural material. It is widely used in aerospace, transportation and other fields, but it is more sensitive to stress corrosion. Alloys contained in 7075 There are not only many kinds of elements, but also a high content. While generating a large number of intermetallic compound strengthening phases, it also reduces the plasticity and corrosion resistance of the material. Some of these intermetallic compounds are difficult to re-dissolve into the matrix during the solid solution process. , The subsequent heat treatment is also difficult to overcome. The use of rapid solidification can increase the solid solubility of alloy elements in the matrix, refine the structure, and improve the strength and toughness of the material. 6xxx series aluminum alloys have excellent formability and are the only Aluminum alloy that is not sensitive to stress corrosion. In recent years, it has been used in large quantities in the automotive industry instead of steel as body panels. To make 6xxx series aluminum alloys meet the mechanical requirements of body frame materials, "paint hardening" is a key process. However, natural aging will have a "negative effect" on the hardening of the aluminum alloy paint for the car body. Therefore, it is necessary to study solutions. Pre-aging and pre-deformation are effective methods to solve this problem, but it is rare to combine these two processes, especially their succession. In-depth research reports are carried out in order. This topic uses a newly developed 6014 aluminum alloy suitable for use as body panels as the research object, and uses solid solution treatment, natural aging, artificial aging, pre-aging and pre-deformation processes to compare 6014 The aluminum alloy is processed, and the effects of various processes on the precipitation behavior of the material's strengthening phase and the mechanical properties are studied. The use of aluminum alloys as automotive materials has become a boom. In order to meet the future of automotive scraps, there will be a large amount of aluminum alloys to be recycled.
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