High-efficient creep age forming method for aluminum alloy

Abstract

The invention relates to a high-efficient creep age forming method for an aluminum alloy. A hot-rolled aluminum alloy panel is subjected to solid solution and is then water-quenched, the quenched panel is placed in the middle and is subjected to cold deformation with the deformation being 20 to 90 percent at the room temperature until the required thickness is obtained, and then creep age formingis carried out. According to the high-efficient creep age forming method for the aluminum alloy provided by the invention, through cold deformation after alloy solid solution-quenching and before creep aging, a large number of dislocation, dislocation configuration and natural aging atom clusters are introduced into the alloy, and a part of dislocation and natural aging atom clusters can be used as a heterogeneous nucleation area of a precipitated phase, so that the precipitation of a main strengthening phase is promoted, the density of the precipitated phase is increased, the dimension is remarkably refined, and the creep rate and a mechanical property of creep aging are finally improve greatly. Through 20 to 90 percent of cold deformation, a large number of movable dislocation is introduced into the alloy, and the alloy creep quantity can be remarkably improved at lower temperature and stress through a creep age forming process, so that the age forming efficiency of the alloy is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of precision forming of aluminum alloy components, in particular to an aluminum alloy high-efficiency creep aging forming method. Background technique [0002] Aluminum and aluminum alloys have many advantages such as low density, high corrosion resistance, good electrical and thermal conductivity, etc., and are widely used in aerospace and rail transportation and other fields. The technology of large-scale aluminum alloy integral wall panels has been a research hotspot in the manufacture of key aerospace parts in recent years. In order to meet the requirements of high performance and light weight of aerospace components, creep aging forming technology has been gradually applied in recent years. Creep aging forming technology is suitable for the forming of integral ribs of age-strengthenable aluminum alloys and wall panels with variable thickness and complex shape structures, and has the characteristics of s...

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Problems solved by technology

Although this process can realize component forming on the basis of ensuring the performance of aluminum alloy products, effective deformation can only be achieved when the applied stress is large, and the creep temperature is high, which is not conducive to the close fit between the component and the mold surface, and its creep The aging time is long, the forming efficiency is low, and the energy consumption is large, which does not meet the economic principle

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