2024 aluminum alloy melting casting method

Abstract

The invention belongs to the technical field of aluminum alloy, and relates to a 2024 aluminum alloy melting casting method. The aluminum alloy is prepared from the following ingredients in percentageby mass: smaller than or equal to 0.25 percent of Si, smaller than or equal to 0.35 percent of Fe, 4.55 to 4.65 percent of Cu, 0.5 to 0.7 percent of Mn, 1.55 to 1.65 percent of Mg, 0.1 percent of Cr,0.2 percent of Zn, smaller than or equal to 0.12 percent of Ti, impurities (the quantity of single impurities is smaller than or equal to 0.05 percent; the total quantity is smaller than or equal to0.15 percent) and the balance of Al; then, melting, refining, degassing, slag removal and casting are performed; a semi-continuous casting process is used for casting; in the refining process, 23 to 28 percent of NaCl, 20 to 40 percent of KCl and 40 to 60 percent of MgCl2 are added to be used as refining agents; the casting temperature is controlled to be 730 to 740 DEG C; the casting speed is 20to 22 mm / min; the single water flowrate is 300 to 310 L / min; the 2024 aluminum alloy cast ingot is obtained. An aluminum cast rod produced by the 2024 aluminum alloy melting casting method has few defects; the material performance and the finished product rate are improved; the energy consumption is reduced; the production cost is reduced; good economic benefits are realized.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloys and relates to a 2024 aluminum alloy melting and casting method. Background technique [0002] Aluminum alloy is a general term for aluminum-based alloys. The main alloying elements are copper, silicon, magnesium, zinc, and manganese, and the secondary alloying elements are nickel, iron, titanium, chromium, and lithium. Aluminum alloy has low density, but relatively high strength, close to or exceeding high-quality steel, good plasticity, can be processed into various profiles, has excellent electrical conductivity, thermal conductivity and corrosion resistance, and is widely used in industry. [0003] Aluminum alloys can be divided into two categories: deformed aluminum alloys and cast aluminum alloys according to processing methods: cast aluminum alloys can be divided into aluminum-silicon alloys, aluminum-copper alloys, aluminum-magnesium alloys, aluminum-zinc alloys and aluminum rare e...

AI Technical Summary

Problems solved by technology

[0006] In view of this, the present invention provides a 2024 aluminum alloy smelting and casting method in order to solve the problem of unacceptable defects such as cracks due to improper process selection during the casting process of 2024 aluminum alloy

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