Method for preparing high-strength aluminum alloy
An aluminum alloy, high-strength technology, applied in the field of preparation of high-strength aluminum alloy, can solve problems such as difficulty in meeting continuous demand, low strength and hardness, and inhomogeneity
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[0034] The invention provides a method for preparing a high-strength aluminum alloy, comprising the following steps,
[0035] a) performing high-energy ball milling on 94-98 parts by weight of aluminum powder, 1-3 parts by weight of copper powder and 1-3 parts by weight of magnesium powder to obtain a mixed powder;
[0036] b) after isostatic pressing the mixed powder to obtain a preform;
[0037] c) preheating the preform obtained in step b), and then performing hot extrusion to obtain an aluminum alloy.
[0038] In the invention, firstly, 94-98 weight parts of aluminum powder, 1-3 weight parts of copper powder and 1-3 weight parts of magnesium powder are subjected to high-energy ball milling to obtain mixed powder. The weight part of the aluminum powder is preferably 94-98, more preferably 94.5-97.5, more preferably 95-97, most preferably 95.5-96.5; the weight part of the copper powder is preferably 1-3, more preferably 1.25~3.75, more preferably 1.5~3.5, most preferably 1...
Embodiment 1
[0055] a) the weight is 100 kilograms, the copper powder is 1%, the magnesium powder is 3%, and the aluminum powder is 98% of the raw materials into the ball mill jar, The weight of the steel ball is 1 ton, and 1000 milliliters of absolute ethanol and 800 milliliters of acetone are added as anti-forging agents. The mixed powder obtained after mechanical milling for 20 hours;
[0056] b) isostatically pressing the mixed powder at a pressure of 100 MPa to obtain a green body;
[0057] c) Preheat the green body in air environment, the preheating temperature is 450°C, and keep it warm for 50 minutes; the heated green body is immediately put into the extrusion barrel of the extruder, and the extrusion barrel heating temperature is 410°C , the sample was extruded under the conditions of an extrusion ratio of 4:1, an extrusion speed of 4mm / s, and a pressure of 1300T, and a high-strength aluminum alloy rod was obtained after water cooling and quenching.
[0058] After the aluminum ...
Embodiment 2
[0061] a) the weight is 100 kilograms, and the copper powder is 2%, the magnesium powder is 2%, and the aluminum powder is 96% of raw materials into the ball mill jar, The weight of the steel ball is 1 ton, and 1000 milliliters of absolute ethanol and 800 milliliters of acetone are added as anti-forging agents. The mixed powder obtained after mechanical milling for 30 hours;
[0062] b) isostatically pressing the mixed powder at a pressure of 200 MPa to obtain a green body;
[0063] c) Preheat the green body in air environment, the preheating temperature is 460°C, and keep it warm for 30 minutes; the heated green body is immediately put into the extrusion barrel of the extruder, and the extrusion barrel heating temperature is 400°C , the sample was extruded under the conditions of an extrusion ratio of 32:1, an extrusion speed of 5mm / s, and a pressure of 1200T, and a high-strength aluminum alloy rod was obtained after water cooling and quenching.
[0064] After the aluminum a...
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