Technology and application of aluminum alloy steel pipe

By Published On: May 13th, 2023Categories: Pipe Knowledge0 Comments
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The extrudable size range of the aluminum alloy tube varies with the extrusion method. The maximum outer diameter of the conventional perforated needle extrusion method to extrude the aluminum alloy tube is 600-650mm, the minimum inner diameter is 5-15mm, and the minimum wall thickness is 2-5mm. Due to the strength and rigidity of the piercing needle, the minimum inner diameter and wall thickness of the extruded aluminum alloy tube are greatly restricted. Among them, the minimum inner diameter and minimum wall thickness of the soft aluminum alloy aluminum alloy pipe may be the lower limit of the above range, and the hard aluminum alloy may take the upper limit. In addition, when the outer diameter of the aluminum alloy tube is large, the minimum wall thickness of the aluminum alloy tube is usually not less than 5% of the outer diameter of the aluminum alloy tube. Aluminum alloy pipes with an outer diameter of more than 500mm are mostly formed by reverse extrusion.

Using Confrom splitter die extrusion, it can form aluminum alloy tubes with a thin, uniform wall thickness and small eccentricity compared with punch pin extrusion. However, considering the quality of the welding seam, the largest aluminum alloy tube outer diameter that can be formed on the same extrusion equipment or the outer diameter of the aluminum alloy tube that can be extruded with the same extrusion cylinder is larger than that of the piercing needle extrusion method. small. The relationship between the size and minimum wall thickness of 6063 aluminum alloy aluminum alloy pipe extruded by a split die is shown in Figure 3-2-3.

Using Conform continuous extrusion technology, it can produce aluminum alloy tubes with an outer diameter of 10 mm and a wall thickness of 0.5 mm or less.

With the continuous improvement of cold-rolled tube and drawn tube technology, the minimum wall thickness of aluminum alloy tube can reach 0.1-0.2mm or thinner.

At present, the maximum diameter of the extruded pipe produced on the 350MN large vertical extruder (reverse extrusion) can reach l500mm; on the 196MN horizontal extruder, it can reach l000mm. The minimum outer diameter of the extruded tube can reach 5mm. The maximum diameter of cold-rolled thin-walled pipes can reach more than 120mm, and the minimum diameter is less than 15mm. The diameter of the cold-drawn thin-walled tube is 3~500mm, and the large thin-walled tube with a diameter of 3000mm can be rolled by the spinning method.

With continuous automatic production line or coil drawing method, aluminum alloy aluminum alloy tube with a length of 1000mm can be produced.

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