A kind of preparation method of high toughness 2050 aluminum alloy plate
An aluminum alloy and high toughness technology, which is applied in the field of aluminum alloy processing, can solve the problems of releasing material deformation, limited performance improvement of 2050 aluminum alloy, and reducing quenching residual stress, so as to improve toughness, optimize physical and mechanical properties, and promote intergranular The effect of precipitate growth
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[0019] The invention provides a method for preparing a high-toughness 2050 aluminum alloy plate, comprising the steps of:
[0020] S1. Heat the 2050 aluminum alloy ingot at 500-550°C for 20-35 hours;
[0021] S2. Hot rolling the treated 2050 aluminum alloy ingot at 400-430° C., and then cold rolling to obtain a 2050 aluminum alloy plate;
[0022] S3, the prepared medium and thick plate is solution treated at 500-530°C, and the treatment time is 0.25-0.5h / cm in terms of average section thickness, and then water-quenched;
[0023] S4. Perform two-stage artificial aging treatment on the medium-thick plate after water quenching, wherein the temperature of the first artificial aging treatment is higher than the temperature of the second artificial aging treatment, and the time of the first artificial aging treatment is shorter than that of the second artificial aging treatment time.
[0024] Heat treatment of 2050 aluminum alloy ingots before rolling can reduce lattice defects, r...
Embodiment 1
[0030] The 2050 aluminum alloy ingot was kept at 500°C for 35h, then hot rolled at 430°C, and then cold rolled to obtain a 30mm thick plate of 2050 aluminum alloy, which was solution treated at 500°C for 1.5h, then water quenched immediately, and finally The first aging treatment was carried out at 280°C for 20 minutes, and the second aging treatment was carried out at 180°C for 2 hours.
Embodiment 2
[0032] The 2050 aluminum alloy ingot was kept at 550°C for 25h, then hot rolled at 400°C, and then cold rolled to obtain a 30mm thick plate of 2050 aluminum alloy, which was solution treated at 530°C for 1h, then water quenched immediately, and finally rolled at 250°C. The first aging treatment was carried out at 160°C for 30 minutes, and the second aging treatment was carried out at 160°C for 4 hours.
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