Artificial aging-state high-strength aluminum alloy retrogression forming synchronous process

Abstract

The invention provides an artificial aging-state high-strength aluminum alloy retrogression forming synchronous process. Firstly, a stamping forming die is cleaned, and an artificial aging-state aluminum alloy is placed on the die; a sheet is rapidly heated to a temperature higher than an artificial aging temperature by 120-160 DEG C by means of electromagnetic induction or electric conduction heating; the heat preservation is carried out for a certain time period, wherein the heat preservation time is controlled to be 20-60 seconds or within; the stamping and the forming are carried out in the process, and a formed component is air-cooled to the room temperature; and the artificial aging strengthening treatment can be continuously carried out at a later stage according to the requirements. According to the process, the alloy stamping formability can be remarkably improved at a lower temperature, and specifically, the formability efficiency of the high-strength aluminum alloy is improved while the material performance of the high-strength aluminum alloy is ensured; and the synchronous process is beneficial to the cooperative control of the shape and performance of the high-strengthalloy, and can be used for manufacturing parts of automobiles, aerospace, ships and the like.

Description

technical field [0001] The invention belongs to the technical field of metal material processing, and in particular relates to a synchronous process for regressive forming of high-strength aluminum alloys in an artificial aging state. Background technique [0002] Aluminum alloy has the advantages of low density, good plasticity, and strong corrosion resistance. Its resources are relatively abundant, and it can be processed into various profiles and plates. It has excellent electrical conductivity, thermal conductivity, and corrosion resistance. It has been widely used in industry. . The strength of 2xxx series, 6xxx series and 7xxx series wrought aluminum alloys mainly comes from the precipitated phase formed by solute atoms during the aging process after solution quenching, so the aging process is very important to obtain excellent mechanical properties. High-strength aluminum alloy sheets have low elongation at room temperature and are difficult to form by conventional c...

AI Technical Summary

Problems solved by technology

However, this process is only suitable for artificially aged and under-aged plates, and the forming temperature is still high and the time is long, facing the same problem as the CN108380722A patent

[0004] In the existing stamping and forming production of aluminum alloy sheets, it is basically necessary to heat the sheet to a higher temperature for a certain period of time, and then cool it to a certain temperature through a cooling device to form it. Forming at this high temperature may cause the sheet to crack, deform, Coarsening of precipitated phases, reduced performance, etc., and this process has low efficiency and high energy consumption

Images