Recycling of Aluminum Chips by Hot Extrusion

2013 ◽  
pp. 197-201
Author(s):  
Matthias Haase ◽  
Andreas Jäger ◽  
A. Erman Tekkaya
Keyword(s):  
Hot Extrusion ◽  
Aluminum Chips

scholarly journals Friction-Induced Recycling Process for User-Specific Semi-Finished Product Production

Metals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 663
Author(s):  
Thomas Borgert ◽  
Werner Homberg
Keyword(s):  
High Efficiency ◽  
Research Work ◽  
Hot Extrusion ◽  
Extrusion Process ◽  
Efficient Production ◽  
Secondary Aluminum ◽  
Shape Accuracy ◽  
Aluminum Chips ◽  
Spinning Process ◽  
Complex Parts

Modern forming processes often allow today the efficient production of complex parts. In order to increase the sustainability of forming processes it would be favorable if the forming of workpieces becomes possible using production waste. At the Chair of Forming and Machining Technology of the Paderborn University (LUF) research is presently conducted with the overall goal to produce workpieces directly from secondary aluminum (e.g., powder and chips). Therefore, friction-based forming processes like friction spinning (or cognate processes) are used due to their high efficiency. As a pre-step, the production of semi-finished parts was the subject of accorded research work at the LUF. Therefore, a friction-based hot extrusion process was used for the full recycling or rework of aluminum chips into profiles. Investigations of the recycled semi-finished products show that they are comparable to conventionally produced semi-finished products in terms of dimensional stability and shape accuracy. An analysis of the mechanical properties of hardness and tensile strength shows that a final product with good and homogeneously distributed properties can be produced. Furthermore, significant correlations to the friction spinning process could be found that are useful for the above-mentioned direct part production from secondary aluminum.

Effect of Hot Extrusion Parameters on Tensile Strength and Fracture Behavior in Direct Recycling of Aluminium Alloy (6061) Chips

2020 ◽  
Vol 975 ◽  
pp. 229-234
Author(s):  
Mohammed H. Rady ◽  
Mohammad Sukri Mustapa ◽  
Shazarel Shamsudin ◽  
Mohd Amri Lajis ◽  
Mohd Idrus Mohd Masirin ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Optimum Condition ◽  
Fracture Behavior ◽  
Hot Extrusion ◽  
Extrusion Process ◽  
High Tensile Strength ◽  
Preheating Temperature ◽  
Aluminum Chips ◽  
Full Factorial ◽  
Alloy 6061

Produced Profiles by direct recycling of aluminum chips in hot extrusion process were achieved by temperature related parameters using preheating temperature 450 °C, 500 °C, and 550 °C for duration 1 hour, 2 hours, and 3 hours preheating time. By using Design of Experiments (DOE) procedure with full factorial design and three center points analysis, the results showed that the preheating temperature factor is more important to be controlled rather than the preheating duration and increase of temperature conducted to the high tensile strength. The profiles extruded at 550 °C and 3 hours’ duration had obtained the optimum condition to get the maximum tensile strength. The influence of parameters of hot extrusion process on fracture surfaces of the recycled samples was also investigated and discussed.

Fly Ash Particle Reinforced AA6061 Composites Produced by Recycling of Aluminum Chips and Fly Ash Particles

2011 ◽  
Vol 324 ◽  
pp. 38-41
Author(s):  
Recep Vatansever ◽  
Harun Mindivan ◽  
E.S. Kayali
Keyword(s):  
Mechanical Properties ◽  
Electrical Conductivity ◽  
Compressive Strength ◽  
Aluminum Alloy ◽  
Fly Ash ◽  
Hot Extrusion ◽  
Ash Content ◽  
Aluminum Powders ◽  
Aluminum Chips ◽  
Recycled Composites

In this work, the re-use of aluminum AA6061 chips and fly ash particles by solid-state processes (cryomilling, cold compaction and hot extrusion) is presented. The process was performed in following steps: comminuting of chips, cryomilling of comminuted chips, aluminum powders and fly ash particles, cold pressing-hot extrusion approach without sintering step. Comparative analysis of the recycled composites with fine and coarse granulated chips was focused on mechanical properties and correlated to microstructural features. The density and electrical conductivity of the recycled composites are lower than those of the unreinforced aluminum alloy due to the presence of fly ash particles. Regarding mechanical properties, the recycled composites with coarse granulated chips showed higher hardness and compressive strength than the recycled composites with fine granulated chips, but the compressive strength of the recycled composites with coarse granulated chips decreased with the increase of fly ash content.

scholarly journals VARIOUS POSSIBILITIES OF THE HOT EXTRUSION IN ALUMINUM CHIPS PROCESSING

2014 ◽  
Vol 20 (3) ◽  
Author(s):  
Róbert Kočiško ◽  
Róbert Bidulský ◽  
Lukáš Dragošek ◽  
Milan Škrobian
Keyword(s):  
Hot Extrusion ◽  
Aluminum Chips

Recycling without Melting: An Alternative Approach to Aluminum Scrap Recovery

2016 ◽  
Vol 682 ◽  
pp. 284-289 ◽  
Author(s):  
Mateusz Wędrychowicz ◽  
Łukasz Wzorek ◽  
Tomasz Tokarski ◽  
Piotr Noga ◽  
Jakub Wiewióra
Keyword(s):  
Mechanical Properties ◽  
Hot Extrusion ◽  
Tensile Tests ◽  
Charge Material ◽  
Machining Process ◽  
Uniaxial Tensile ◽  
Recycling Process ◽  
Aluminum Chips ◽  
Study Results ◽  
A Charge

Method of scrap recovery by hot extrusion in a contrast to traditional aluminum recycling process distinguishes itself with a low energy consumption and high recovery efficiency. Additionally, this type of recycling allows to recover materials even from highly fragmented forms of metal like chips, foils or filings by omitting melting procedure. In the present study results of 413.0 aluminum chips plastic consolidation will be presented. Chips after machining process were used as a charge material for the entire recycling process. In order to determined the best emulsion elimination method, three separate processes such as centrifugation, annealing and pressing were carried out. In result dry, wet and cleaned chips in a form of cylindrical billets were hot extruded into longitudinal square cross-section profiles. Mechanical properties were examined by uniaxial tensile tests while microstructure observations were performed by means of scanning electron microscopy. It has been showed that emulsion elimination by annealing gives the best results while at the same time all extruded materials revealed no significant differences in mechanical properties.

scholarly journals Recycling of Aluminum Chips by Hot Extrusion with Subsequent Cold Extrusion

2014 ◽  
Vol 81 ◽  
pp. 652-657 ◽  
Author(s):  
Matthias Haase ◽  
A. Erman Tekkaya
Keyword(s):  
Hot Extrusion ◽  
Cold Extrusion ◽  
Aluminum Chips

scholarly journals A Review on Recycling Aluminum Chips by Hot Extrusion Process

Procedia CIRP ◽  
2015 ◽  
Vol 26 ◽  
pp. 761-766 ◽  
Author(s):  
S.N. Ab Rahim ◽  
M.A. Lajis ◽  
S. Ariffin
Keyword(s):  
Hot Extrusion ◽  
Extrusion Process ◽  
Aluminum Chips

Effect of Heat Treatment on Tensile Strength of Direct Recycled Aluminium Alloy (AA6061)

2019 ◽  
Vol 961 ◽  
pp. 80-87
Author(s):  
Mohammad Hussein Rady ◽  
Ahmed Sahib Mahdi ◽  
Mohammad Sukri Mustapa ◽  
Shazarel Shamsudin ◽  
Mohd Amri Lajis ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Tensile Strength ◽  
Solid State ◽  
Aging Process ◽  
Hot Extrusion ◽  
Extrusion Process ◽  
High Tensile Strength ◽  
Quenching Temperature ◽  
Preheating Temperature ◽  
Aluminum Chips

Products by solid-state recycling of aluminum chips in hot extrusion process were controlled by temperature related parameters using preheating temperature 450 °C, 500 °C, and 550 °C for 1 hr, 2 hr, and 3 hr preheating time. By using Design of Experiments (DOE), the results found that the preheating temperature is more important to be controlled rather than the preheating time and increasing of temperature led to the high tensile strength. The profile extruded at 550 °C with 3 hr duration had gained the optimum case to get the maximum tensile strength. For the optimum case, heat treatment was carried out using quenching temperature at 530 oC for 2 h and aging process at 175 oC for 4 h. The tensile strength of extrudes specimen was improved significantly compared to those of non-treated specimen.

Hot Extrusion of Aluminum Chips

2012 ◽  
pp. 1559-1573 ◽  
Author(s):  
A. Erman Tekkaya ◽  
Volkan Güley ◽  
Matthias Haase ◽  
Andreas Jäger
Keyword(s):  
Hot Extrusion ◽  
Aluminum Chips

Hot Extrusion of Aluminum Chips

2012 ◽  
pp. 1559-1573
Author(s):  
A. Erman Tekkaya ◽  
Volkan Güley ◽  
Matthias Haase ◽  
Andreas Jäger
Keyword(s):  
Hot Extrusion ◽  
Aluminum Chips
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