Molding and aging technology of 7A04 superhard aluminum alloy section bar
A hard aluminum alloy and super hard aluminum technology, which is applied in the field of forming and timeliness of 7A04 super hard aluminum alloy profiles, can solve problems such as failure to meet performance requirements and poor forming stability of aluminum profiles, and achieve high yield and processing. high effect
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[0018] Example 1
[0019] (1) Select super-duralumin cast rods with chemical composition in the following range for heating: Si: ≤0.3 Fe: ≤0.35 Cu: ≤0.2 Mn: ≤0.3 Mg: 0.9-1.0 Cr: ≤0.2 Zn: 5.5-6.0 Ti : ≤0.2 Zr: 0.05-0.25.
[0020] (2) Mold heating, generally flat molds are used for 7A04 materials, and the molds are heated to 440°C for 1.5 hours;
[0021] (3) The casting rod is put into the furnace to start heating, and the casting rod is heated to 440°C for 1.5 hours;
[0022] (4) The ingot barrel is heated, and the ingot barrel is heated to 410°C before extrusion, and kept warm for 8 hours;
[0023] (5) Put the cast rod and die into the extruder. The aluminum extrusion is controlled at a speed of 1.5m / min. The extrusion speed mainly depends on the shape and area of the aluminum, and it is cooled to 50% by water quenching. ℃ / 30 seconds or less, extreme cooling has a good effect on obtaining the best strength and internal structure of the aluminum after processing; the pressure of th...
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[0027] (9) Aging treatment, push the aluminum into the aging furnace, close the furnace door and start heating to 120°C for the first time, holding for 3 hours, then heating to 140°C for the second time, holding for 3 hours, and pulling the aluminum out of the furnace Air-cooled outside, air-cooled to below 50 ℃. Example 2
[0028] (1) Select super-duralumin cast rods with chemical composition in the following range for heating: Si: ≤0.3 Fe: ≤0.35 Cu: ≤0.2 Mn: ≤0.3 Mg: 0.9-1.0 Cr: ≤0.2 Zn: 5.5-6.0 Ti : ≤0.2 Zr: 0.05-0.25.
[0029] (2) Mold heating, generally 7A04 materials use flat mold molds. The mold is heated to 450°C and kept for 2 hours; (3) The casting rod is put into the furnace to start heating, and the casting rod is heated to 450°C. Keep warm for 1.5 hours.
[0030] (4) The ingot barrel is heated, and the ingot barrel is heated to 420°C before extrusion, and kept for 9 hours;
[0031] (5) Put the cast rod and die into the extruder, the aluminum extrusion is controlled at ...
Example Embodiment
[0036] Example 3
[0037] (1) Select super-duralumin cast rods with chemical composition in the following range for heating: Si: ≤0.3 Fe: ≤0.35 Cu: ≤0.2 Mn: ≤0.3 Mg: 0.9-1.0 Cr: ≤0.2 Zn: 5.5-6.0 Ti : ≤0.2 Zr: 0.05-0.25.
[0038] (2) Mold heating. Generally, 7A04 materials use flat molds. The mold is heated to 460℃ and kept for 2.5 hours; (3) The cast rod is put into the furnace to start heating, and the cast rod is heated to 460°C. Keep warm for 2 hours;
[0039] (4) The ingot barrel is heated, the ingot barrel is heated to 430°C before extrusion, and the temperature is kept for 10 hours; (5) The casting rod and die are put into the extruder, and the aluminum extrusion is controlled at a speed of 5m / min , The speed during extrusion mainly depends on the shape and area of the aluminum material. It is cooled to below 50℃ / 30 seconds by water-cooling quenching. Extreme cooling has a good effect on obtaining the best strength and internal structure of the aluminum material after p...
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