Preparation method of 5083h321 aluminum alloy thick plate
A technology for aluminum alloy and alloy ingots, applied in the field of sheet metal manufacturing, can solve the problems of low production efficiency and unstable performance, and achieve the effect of improving rolling efficiency and obvious effect.
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Embodiment 1
[0015] The preparation method of the 50mm thick 5083H321 aluminum alloy thick plate includes the following steps: sawing and milling the 5083 alloy ingot with a specification of 620*2280*6280mm, sawing the expansion head to 200mm, sawing the gate to 80mm, and milling the large face to 15mm , The small face milling amount is 8mm; the ingot after sawing and face milling is heated at 480 ℃ and kept for 4 hours; the heated ingot is rolled at 470 ℃, and the rolling adopts a large reduction , The final rolling temperature is 280°C, and the rolling time is 0.5h to obtain a 50mm thick hot-rolled 5083 plate; then the 50mm thick plate is cooled to 50°C, and stretched three times, the total time is 0.5h, and the stretching rate is set to 0.6%, respectively. 1.0%, 1.4%, and the yield strength is set at 190MPa, 210MPa, and 240MPa respectively; the stretched sheet is subjected to stabilization annealing at an annealing temperature of 100°C, held for 2 hours, and then sawed to length to obtai...
Embodiment 2
[0017] The preparation method of the 70mm thick 5083H321 aluminum alloy plate includes the following steps: sawing and milling the 5083 alloy ingot with a specification of 620*2400*6280mm, sawing the expansion head to 200mm, sawing the gate to 80mm, and milling the large face to 15mm , The small face milling amount is 8mm; the ingot after sawing and face milling is heated at 480 ℃ and kept for 4 hours; the heated ingot is rolled at 470 ℃, and the rolling adopts a large reduction , The final rolling temperature is 285°C, and the rolling time is 0.6h to obtain a 70mm thick hot-rolled 5083 plate; cooling to 50°C, and then stretching the 70mm thick plate for 3 times, the total time is 0.5h, and the stretching rate is set to 0.8%, respectively. 1.0%, 1.2%, and the yield strength is set at 185MPa, 200MPa, and 230 MPa respectively; the stretched sheet is subjected to stabilization annealing at an annealing temperature of 100°C and held for 2 hours, and then sawing and cutting to lengt...
Embodiment 3
[0019] The preparation method of the 70mm thick 5083H321 aluminum alloy plate includes the following steps: sawing and milling the 5083 alloy ingot with a specification of 620*2520*6280mm, sawing the expansion head 200mm, sawing the gate 80mm, and milling the large face 15mm , small face milling amount 8mm; heat the ingot after sawing and face milling at 480°C, and keep it warm for 4h; then start rolling the heated ingot at 470°C, using high pressure for rolling The final rolling temperature is 283°C, and the rolling time is 0.8h to obtain a 70mm thick hot-rolled 5083 plate; the 70mm thick plate is cooled to 50°C, and then stretched three times, the total time is 0.5h, and the stretching rate is set to 1.0% respectively , 1.2%, 1.4%, and the yield strength is set at 200MPa, 215MPa, and 235MPa respectively; the stretched sheet is subjected to stabilization annealing at an annealing temperature of 100°C and kept for 2 hours; after that, it is sawed and cut to length to obtain 70m...
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