Hot-top casting process of 7075 aluminium alloy round rod with diameter of phi582 mm
A 582mm, hot-top casting technology, applied in the field of aluminum alloy casting, can solve the problems of large-diameter aluminum alloy round casting rods with coarse grain layer thickness, internal quality cannot be guaranteed, and many auxiliary facilities, so as to improve the yield of one-time production and avoid The bottom laying process and the effect of eliminating potential safety hazards
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Embodiment 1
[0020] Embodiment 1, a hot-top casting process of a 7075 aluminum alloy round bar of Φ582 mm, comprising the following steps:
[0021] a. Ingredients: ingredients according to the following weight percentages: Fe: 0.50, Cu: 1.4, Mn: 0.30, Mg: 2.3, Cr: 0.25, Zn: 5.4, Ti: 0.1 and the rest are aluminum ingots;
[0022] b. Melting: During the melting process, the melting temperature is strictly controlled at 735°C;
[0023] c, slag removal;
[0024] d. Alloying;
[0025] e. Casting: During the casting process, the casting speed and the cooling water flow rate change with the casting time, specifically: the casting speed is 5mm / min, and the cooling water flow rate is 450L / min at the 0th-60th second; the 90th-60th second 140 seconds, the casting speed is 9mm / min, the cooling water flow rate is 500L / min; the 160th-220th second, the casting speed is 11mm / min, the cooling water flow rate is 550L / min; the 230th-290th second, the casting speed is 13mm / min min, the cooling water flow r...
Embodiment 2
[0028] Embodiment 2, a hot-top casting process of a Φ582mm 7075 aluminum alloy round bar, comprising the following steps:
[0029] a. Ingredients: ingredients according to the following weight percentages: Si: 0.40, Cu: 1.6, Mg: 2.8, Cr: 0.19, Zn: 6.0, Zr+Ti: 0.25, and the rest are aluminum ingots;
[0030] b. Melting: During the melting process, the melting temperature is strictly controlled at 755°C;
[0031] c, slag removal;
[0032] d. Alloying;
[0033] e. Casting: During the casting process, the casting speed and the cooling water flow rate change with the casting time, specifically: the casting speed is 5mm / min, and the cooling water flow rate is 450L / min at the 0th-60th second; the 90th-60th second 140 seconds, the casting speed is 9mm / min, the cooling water flow rate is 500L / min; the 160th-220th second, the casting speed is 11mm / min, the cooling water flow rate is 550L / min; the 230th-290th second, the casting speed is 13mm / min min, the cooling water flow rate is 55...
Embodiment 3
[0036] A hot-top casting process for a 7075 aluminum alloy round bar of Φ582mm, characterized in that it comprises the following steps:
[0037] a. Ingredients: ingredients according to the following weight percentage: Si: 0.11 Fe: 0.18 Cu: 1.6 Mn: 0.16 Mg: 2.56 Cr: 0.21 Zn: 5.63 Ti: 0.037, and the rest are aluminum ingots;
[0038] b. Melting: During the melting process, the melting temperature is strictly controlled at 745°C;
[0039] c, slag removal;
[0040] d. Alloying;
[0041] e. Casting: During the casting process, the casting speed and the cooling water flow rate change with the casting time, specifically: the casting speed is 5mm / min, and the cooling water flow rate is 450L / min at the 0th-60th second; the 90th-60th second 140 seconds, the casting speed is 9mm / min, the cooling water flow rate is 500L / min; the 160th-220th second, the casting speed is 11mm / min, the cooling water flow rate is 550L / min; the 230th-290th second, the casting speed is 13mm / min min, the cooli...
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