Light Metals Chips Recycling by Plastic Consolidation

Abstract:

In this work, hot extrusion of light metal scraps as a new way of plastic consolidation will be presented. This kind of material recovering is a promising alternative for conventional recycling processes. Nowadays discards from machining of semi-finished products are being recycled throughout re-melting processes. However, due to its significant susceptibility to oxidation most of the chips and scraps are burnt during the melting process. It has been already recognized that aluminum losses connected with this operation can reach from 40% to 50%. A technology that has been presented in this work combines cold compaction and hot extrusion of 413.0 aluminum alloy scraps. It was found that quality of as-extruded rods depends strongly on extrusion conditions. Higher extrusion speed leads to higher quality of rods surface. Additionally brittle Si and Al-Fe-Si particles increases overall mechanical properties in comparison to its industrial counterpart.

• Periodical: Key Engineering Materials (Volume 641)
• Pages: 24-29
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.641.24
• Online since: April 2015
• Authors: Tomasz Tokarski, Mateusz Wędrychowicz*, Marcel Wiewióra
• Keywords: Aluminium Alloy, Hot Extrusion, Mechanical Properties, Recycling

References

[1] Information on http: /www. crugroup. com.

[2] M. Schlesinger, Aluminum Recycling, first ed., CRC Press, (2006).

[3] A. Kaye, A. Street, Die Casting Metallurgy: Butterworths Monographs in Materials, Butterworth-Heinemann, (1982).

[4] H. Dybiec, P. Kozak, Evolution of grain structure during hot extrusion of powders, Powder Metallurgy Progress. 3 (2003) 146-151.

[5] H. Dybiec, P. Kozak, Hot extrusion of aluminium powders, Int. J for Ind. Res. & Appl. Aluminium. 80 (2004) 39-43.

[6] H. Dybiec, P. Kozak, Mechanical properties of aluminium wires produced by plastic consolidation of fine grained powders, Solid State Phenomena, 101-102 (2004) 131-134.

DOI: 10.4028/www.scientific.net/ssp.101-102.131

[7] H. Dybiec, Submikrostrukturalne stopy aluminium, Wydawnictwa Naukowo-Dydaktyczne AGH, Kraków, (2008).

[8] T. Tokarski, Effect of Rapid Solidification on the structure and Mechanical Properties of AZ91 magnesium alloy, Solid State Phenomena. 186 (2012) 120-123.

DOI: 10.4028/www.scientific.net/ssp.186.120

[9] A. Kula, L. Blaz, M. Sugamata, Structural and mechanical features of rapidly solidified Al-2Fe-Ni-5Mg alloy, Solid State Phenomena. 186 (2012) 279-282.

DOI: 10.4028/www.scientific.net/ssp.186.279

[10] T. Tokarski, Ł. Wzorek, H. Dybiec, Microstructure and plasticity of hot deformed 5083 aluminium alloy produced by rapid solidification and hot extrusion, Archives of Metallurgy and Materials. 57 (2012) 1253-1259.

DOI: 10.2478/v10172-012-0140-2

[11] T. Skrzekut, A. Kula, L. Blaz, G. Wloch, M. Sugamata, High-strength and thermally stable Al-CeO2 composite produced by means of mechanical alloying, International Journal of Materials Research. 105 (2014), 282-287 (doi: 10. 3139/146. 111019).

DOI: 10.3139/146.111019

[12] M. Kamiya, T. Yakou, Role of second-phase particles in chip breakability in aluminum alloys, International Journal of Machine Tools and Manufacture. 48 (2008) 688-697.

DOI: 10.1016/j.ijmachtools.2007.10.018