Extrusions

Two up-to-date high-performance extrusion lines have been installed at the plant, which use cylindrical ingots as billets.

The first processing line includes a horizontal hydraulic press produced by the Schloemann Company (Germany) with a load capacity of 1,750 tons. This line allows to produce profiles with a minimum wall thickness of 0.8 mm, a maximum diameter of circumscribed circle of 180 mm, weight from 0.1 to 5.0 kg/m and a registered length from 1.7 to 9.5 meters.

The second processing line consists of a horizontal hydraulic press with a load capacity of 1,250 tons, a minimum wall thickness of 0.7 mm and a maximum diameter of circumscribed circle of 90 mm. The main activity is the production of tubes using a winding machine. This tube is widely used in assembling automotive radiators.

The extrusion process consists of several stages: billet in-size cutting, billet heating with creation of in-length temperature gradient, direct extrusion and, finally, supply of the profile to a quenching outlet table.

The quenching process is performed on the outlet table by means of the air flow boosted by cooling fans. In order to ensure proper linearity and dimensions, the profile is to be flattened and stretched. Then the profile is cut in size in accordance with customer's requirements.

The final heat treatment process is carried out in the furnace. After that the properly cut end profiles is subjected to the aging.

The aging process is a heat treatment process applied for alloys subjected to quenching. It consists of the heating and exposure processes carried out at high temperatures and followed by air cooling (artificial aging) or retaining at room temperature (natural aging) in order to obtain required properties.

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