Method for manufacturing 2-series aluminum alloy ingot
A technology of casting aluminum alloy ingots and aluminum alloys, which is applied in the field of aluminum alloys, can solve the problems of poor smoothness of the crystallizer, poor lubricating performance, and restrictions on wide application, and achieve the goals of increasing forming rate, reducing surface cracking, and increasing yield Effect
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[0022] The embodiment of the present invention discloses a method for preparing a 2-series aluminum alloy ingot, comprising the following steps:
[0023] A) melting the raw materials of the 2 series aluminum alloy ingot;
[0024] B) importing the smelted melt into a holding furnace, and refining with a mixed gas, the mixed gas being a mixed gas of nitrogen and chlorine;
[0025] C) performing online degassing and online filtering sequentially on the melt obtained in step B);
[0026] D) casting the melt obtained in step C), the speed of the casting is 48-55mm / min, and the water flow is 28-35m 3 / h·root, the casting temperature is 715°C-725°C, and the 2-series aluminum alloy ingot is obtained.
[0027] This application provides a method for preparing a 2-series aluminum alloy ingot. During the preparation process, the raw materials of the 2-series aluminum alloy are smelted, refined, on-line degassed, on-line filtered and casted, thereby obtaining an aluminum alloy ingot. in...
Embodiment 1
[0034] Ingredients: raw materials include: 0.5wt% of Si, 0.5wt% of Fe, 4.9wt% of Cu, 0.9wt% of Mn, 1.2wt% of Mg, 0.1wt% of Cr, 0.25wt% of Zn and the balance of aluminum;
[0035] Melting: Melting the above raw materials in a melting furnace at a melting temperature of 770°C, flattening, melting and sampling analysis;
[0036] Treatment in the static furnace: transfer the melt in the smelting furnace to the static furnace for refining, use a "T" type refiner in the static furnace, and use N 2 -Cl 2 (N 2 : 88wt%, Cl 2 12%) mixed gas refining, N 2 require H 2 O≤15ppm, O 2 ≤15ppm, Cl 2 require H2 O≤500ppm, the refining time is 15-20 minutes, and the refining temperature is 715°C;
[0037] On-line processing: The refined melt is degassed and filtered on-line in sequence. On-line degassing is degassed by the rotary nozzle method, using Ar gas, the gas flow rate is 2500L / h / rotor, and the gas pressure is 0.35MPa. Through refining in a static furnace and on-line degassing, the...
Embodiment 2
[0041] Ingredients: raw materials include: 1.2wt% of Si, 1.0wt% of Fe, 5.0wt% of Cu, 1.2wt% of Mn, 0.05wt% of Mg, 0.1wt% of Cr, 0.25wt% of Zn and the balance of aluminum;
[0042] Melting: Melting the above raw materials in a melting furnace at a melting temperature of 730°C, flattening, melting and sampling analysis;
[0043] Treatment in the static furnace: transfer the melt in the smelting furnace to the static furnace for refining, use a "T" type refiner in the static furnace, and use N 2 -Cl 2 (N 2 : 88wt%, Cl 2 12%) mixed gas refining, N 2 require H 2 O≤15ppm, O 2 ≤15ppm, Cl 2 require H 2 O≤500ppm, the refining time is 15-20 minutes, and the refining temperature is 715°C;
[0044] On-line processing: The refined melt is degassed and filtered on-line in sequence. On-line degassing is degassed by the rotary nozzle method, using Ar gas, the gas flow rate is 2500L / h / rotor, and the gas pressure is 0.35MPa. Through refining in a static furnace and on-line degassing, ...
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