Medium-strength easy-to-extrude 5-series aluminum alloy ingot

Abstract

The invention discloses a medium-strength easy-to-extrude 5-series aluminum alloy ingot. The medium-strength easy-to-extrude 5-series aluminum alloy ingot is mainly prepared through the following steps that 1) aluminum alloy raw materials are prepared according to the following weight percentage: less than or equal to 0.1% of Si, less than or equal to 0.15% of Fe, less than or equal to 0.05% of Cu, 0.8% to 0.9% of Mn, 3.5% to 3.8% of Mg, 0.15% to 0.20% of Cr, 0.08% to 0.13% of Zr, less than or equal to 0.15% of Zn, less than or equal to 0.015% of Ti, less than or equal to 0.05% of single impurity, less than or equal to 0.15% of total impurities and the balance Al; 2) the prepared aluminum alloy raw materials are added into a smelting furnace to be melted into molten aluminum, and then the molten aluminum is cast into the aluminum alloy ingot; and 3) the aluminum alloy ingot obtained after casting is transferred into a homogenizing furnace to be homogenized, and cooling is conducted after homogenizing. Actual production verifies that when the 5-series aluminum alloy ingot (aluminum bar) produced through the method is extruded, the deformation resistance is reduced by 10% to 15% compared with 5383 alloy under the same technological condition, and the extrusion speed is increased by 30% to 50%.

Description

technical field [0001] The invention relates to the technical field of heat treatment production of a 5-series aluminum alloy, in particular to a preparation process for a medium-strength and easy-to-extrude 5-series aluminum alloy ingot. Background technique [0002] Because aluminum alloy has the characteristics of light weight (1 / 3 of steel), no rust, no corrosion, and easy recycling. At the same time, aluminum can increase its strength through work hardening or heat treatment, thereby achieving a high strength-to-weight ratio; aluminum alloy processing performance Good, suitable for different production processes such as casting, extrusion, stamping, forging and machining; aluminum alloys can also be strengthened to varying degrees by adding different alloying elements and through heat treatment processes; the surface of aluminum alloys is easy to form a dense oxide film and Good corrosion resistance; aluminum alloy also has good electrical and thermal conductivity, and ...

AI Technical Summary

Problems solved by technology

[0004] However, due to the high content of solid-solution Mg in the 5-series aluminum alloy, the deformation resistance of the alloy is large during the extrusion process, resulting in difficulty in forming, especially the medium and high-strength 5-series alloy with high Mg content, even if it can be extruded, its production efficiency Both the production rate and the finished product rate are obviously low, and the production cost is too high to prevent industrial mass production and application

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