Abstract
6xxx series aluminium alloys are mainly used in door- and window- frame manufacturing. Commonly the raw material is recycled aluminium with the correct Mg and Si additive content. The aluminium profile beams extrusion process presents several failure defects, which are obviously associated with various forming parameters such as die geometry and material mechanical properties affected by its chemical constitution. In the present paper, several aluminium alloys were subjected to an experimental procedure in order to estimate the way the above-mentioned parameters affect the extrusion load. Various aluminium alloys were used with Si rating between 0.2% and 0.6% p. w. and Mg rating between 0.5% and 1.3% p. w. This procedure also focused on semi-angle die cone effect, as well as temperature conditions. The most significant result concerns the decrease in the extrusion load observed in aluminium alloys with Mg rate over 0.9% p. w. and Si rate between 0.2% and 0.3% p. w. Extruded through small semi-angle cone die, maintaining improved mechanical characteristics.
