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

An artificial aging and aluminum alloy technology, applied in the field of metal material processing, can solve problems such as low process efficiency, high forming temperature, and coarsening of precipitated phases, and achieve the effects of optimizing heating process, improving forming ability, and stable product quality

Active Publication Date: 2019-03-19
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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

Examples

Experimental program
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Example Embodiment

[0030] Example 1

[0031] After 7075 aluminum alloy is solid-solution treated and water-quenched in an air circulation resistance furnace, aluminum alloy plates are obtained; then they are placed at 120°C for 1 hour, and then heated to 250°C by electromagnetic induction for 30 seconds, 1 minute, and 2 minutes. Perform a thermal compression test during the holding period, and then take it out to cool down at room temperature.

Example Embodiment

[0032] Example 2

[0033] The 7075 aluminum alloy is solid-solution treated and water-quenched in an air circulation resistance furnace to obtain aluminum alloy plates; then placed at 120 ℃ for 12 hours, and then heated to 250 ℃ by electromagnetic induction for 30 seconds, and the plates are thermally compressed in the heat preservation stage Test, then take it out to cool down at room temperature.

Example Embodiment

[0034] Example 3

[0035] The 7075 aluminum alloy is solid-solution treated and water-quenched in an air circulation resistance furnace to obtain aluminum alloy plates; then placed at 120°C for 24 hours, and then heated to 250°C by electromagnetic induction for 30 seconds. The plates are thermally compressed during the heat preservation stage. Test, then take it out to cool down at room temperature.

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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...

Claims

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Application Information

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IPC IPC(8): C22F1/04B21D22/02
CPCB21D22/022C22F1/04
Inventor 刘春辉马培培
Owner CENT SOUTH UNIV
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