Deformation heat treatment method for aluminum alloy

Abstract

The invention discloses a deformation heat treatment method of an aluminum alloy, and a high-strength intergranular-corrosion-resistant aluminum alloy can be obtained by 550 DEG C / 1h solid solution treatment and water quenching, 180 DEG C / 2h under-aging and 85% rolling-reduction cold rolling of 6061 aluminum alloy as a raw material. The tensile strength of the aluminum alloy is 635MPa, the yield strength is 606MPa, the elongation at break is 3.4%, and the average elongation is 0.4%.

Description

technical field [0001] The application belongs to the field of aluminum alloy material manufacturing, and in particular relates to a deformation heat treatment method of aluminum alloy. Background technique [0002] Age-hardening aluminum alloy has low density, high specific strength, good corrosion resistance and plastic formability, and is an important lightweight structural material widely used in aircraft manufacturing, mainly including ultra-high strength 7000 series Al-Zn-Mg-Cu alloy (500-700MPa), high-strength 2000 series Al-Cu-Mg alloy (400-500MPa) and medium-strength 6000 series Al-Mg-Si-Cu alloy (300-400MPa), the representative alloy grades are 7075, 2024 and 6056. Compared with the 7000 series and 2000 series aluminum alloys, although the 6000 series aluminum alloys have the advantages of low material density and cost, ingot formability, plastic processing performance, excellent surface treatment performance and low tendency to stress corrosion cracking. However...

AI Technical Summary

Problems solved by technology

However, so far, the proportion of 6000-series aluminum alloys used in aircraft manufacturing is significantly lower than that of 7000-series and 2000-series aluminum alloys

The primary reason for this phenomenon is the relatively low strength of 6000 series aluminum alloys.

Although artificially aged to the peak state (T6), th

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