6-series aluminum alloy automotive outer panel with excellent comprehensive performance and preparation method thereof

Abstract

The invention belongs to the technical field of aluminum alloy plates for automobile bodies, and relates to a preparation method of a 6-series aluminum alloy automobile outer plate with excellent comprehensive performance, which is prepared from the following element components according to weight percentage: Si: 0.6-1.5%, Fe: 0.1~0.5%, Cu: 0.3~0.6%, Mn: 0.05~0.20%, Mg: 0.25~0.45%, Cr≤0.1%, Zn≤0.1%, single impurity≤0.03%, total impurity≤0.10%, balance It is Al, and its preparation method is to obtain a specific deformation texture structure by controlling the hot rolling reduction and the final rolling temperature, and then combine with the subsequent two annealing processes and appropriate cold rolling passes to finally obtain an excellent comprehensive performance. The 6-series aluminum alloy material is superior to the commonly used 6016 automotive sheet in terms of formability, paint strengthening performance, and surface quality.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy plates for automobile bodies, and relates to a preparation method of a 6-series aluminum alloy automobile outer panel with excellent comprehensive performance, in particular to a 6-series aluminum alloy automobile with excellent surface quality, formability and paint strength performance Outer panel and method for preparing the same. Background technique [0002] Under the current theme of energy saving and emission reduction, automobile lightweight is the most direct and effective way to reduce pollution and reduce consumption. Aluminum alloy and its processing materials have become the main application of automobile manufacturers to reduce vehicle weight due to a series of excellent characteristics such as low density, high specific strength and specific stiffness, good elasticity, good impact resistance, corrosion resistance and good processing performance Material. [0003] The alumin...

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Problems solved by technology

[0005] In view of this, the present invention provides a 6-series aluminum alloy sheet with excellent comprehensive performance in order to solve the problem that the surface quality, formability and paint strength performance of the 6-series aluminum alloy sheet prepared by the existing technology cannot be taken into account, which affects the large-scale application of the outer panel of the automobile body. Preparation method of aluminum alloy automobile outer panel

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