Processing method for inhibiting recrystallization of aluminum lithium alloy

[0035] (1) The aluminum-lithium alloy ingot is prepared by vacuum melting and casting. The chemical composition of the prepared aluminum-lithium alloy is Cu: 2.7wt%, Li: 1.8wt%, Mg: 0.4wt%, Mn: 0.4wt%, Zn: 0.6 wt%, Zr: 0.1wt%, the balance is aluminum;

[0036] (2) Homogenize the ingot at 520°C for 75 hours;

[0037] (3), the homogenized ingot is preheated at 450 ° C, kept for 20 minutes, and then rolled into a plate;

[0038] (4) The aluminum-lithium alloy plate after billeting is subjected to solution treatment at 540° C. for 1 hour, and then quenched with cold water at 25° C.;

[0039] (5) Rolling the quenched aluminum-lithium alloy sheet 6 times at 250° C., the reduction rate of each pass is 16%, the total reduction rate is 65%, and the rolling speed is 6m / min;

[0040] (6) Perform final solid solution on the aluminum-lithium alloy plate after multi-pass temperature-controlled hot rolling, and perform solution treatment at 540° C. for 1 hour;

[0041] (7) pre-stretching t

[0046] A processing method for suppressing the subsequent recrystallization of an aluminum-lithium alloy is carried out as follows:

[0047] (1), using vacuum melting and casting method to prepare aluminum-lithium alloy ingot, the chemical composition of the prepared aluminum-lithium alloy is Cu: 2.8wt%, Li: 1.9wt%, Mg: 0.3wt%,; Mn: 0.5wt%, Zn: 0.7wt%, Zr: 0.08wt%, Si: 0.05wt%, Fe: 0.07wt%, the balance is aluminum;

[0048] (2) Homogenize the ingot at 530°C for 80 hours;

[0049] (3), the homogenized ingot is preheated at 460 ° C, kept for 40 minutes, and then rolled into a plate;

[0050] (4) Carry out solid solution treatment at 510° C. for 2 hours to the aluminum-lithium alloy plate after billeting, and then quench with cold water at 25° C.;

[0051] (5) Rolling the quenched aluminum-lithium alloy plate 5 times at 150° C., the reduction rate of each pass is 15%, the total reduction rate is 55%, and the rolling rate is 4m / min;

[0052] (6) Perform final solid solution on t

[0058] A processing method for suppressing the subsequent recrystallization of an aluminum-lithium alloy is carried out as follows:

[0059] (1), using the vacuum casting method to prepare aluminum-lithium alloy ingots, the chemical composition of the prepared aluminum-lithium alloy is Cu: 2.7wt%; Li: 1.7wt%; Mg: 0.5wt%; Mn: 0.3wt%; Zn: 0.5 wt%; Zr: 0.12wt%, Si: 0.03wt%, Fe: 0.04wt%, the balance is aluminum;

[0060] (2) Homogenize the ingot at 510°C for 70 hours;

[0061] (3), the homogenized ingot is preheated at 420 ° C, kept for 35 minutes, and then rolled into a plate;

[0062] (4) The aluminum-lithium alloy plate after billeting is subjected to solution treatment at 550° C. for 0.5 h, and then quenched in cold water at 25° C.;

[0063] (5) Rolling the quenched aluminum-lithium alloy sheet 8 times at 350° C., the reduction rate of each pass is 20%, the total reduction rate is 83%, and the rolling rate is 8m / min;

[0064] (6) Perform final solid solution on the aluminum-