Hot profile extrusion of different Chip Types of Aluminum Alloy 6060

Tekkaya, A. E.^{1, a}; Güley, V.^{1, b}; Khalifa, N.^{1, c}; Biermann, D.^{2, d}; Pantke, K.^{2, e}

1)

Institut für Umformtechnik und Leichtbau, Technische Universität Dortmund, Baroper Str. 301, 44227 Dortmund

2)

Institut für Spanende Fertigung, Technische Universität Dortmund, Baroper Str. 301, 44227 Dortmund

a) Erman.Tekkaya@iul.tu-dortmund.de; b) volkan.gueley@iul.tu-dortmund.de; c) nooman.ben_khalifa@iul.tu-dortmund.de; d) biermann@isf.de; e) pantke@isf.de

Kurzfassung

This paper presents the recycling of aluminum chips by hot extrusion as an alternative to re-melting. Three different types of aluminum alloy 6060 chips are compacted into billets and hot-extruded at 500°C to full rectangular profiles. The hardness and mechanical properties of the extruded profiles produced from chips are on average 10% lower than those extruded from conventionally cast material, but required only 5% of the energy required for re-melting. Furthermore, the influence of chip characteristics on the properties of hot-extruded profiles has been analyzed. The turning chips with the highest deformation grade showed a relatively unfavorable behavior with respect to the other chip types. Also, the machinability of the extruded profiles was investigated by drilling tests, which have shown even improved properties due to reduced chip length.

Schlüsselwörter

Extrusion, Aluminum, Recycling, Chips

Veröffentlichung

In: Proceedings of the European Aluminium Congress: Aluminium Automotive Applications - Material for Lightweight Construction and Design, 23.11.-24.11. 2009, Düsseldorf