Abstract
This paper presents the possibility of consolidating side products of turning of aluminum alloys into the form and properties of solids metals using low-temperature KoBo extrusion method has been assessed.The proposed method is based on cold compaction of chips into briquettes, and then extrusion by KoBo method at room temperature. The extruded wires were tested for mechanical properties (uniaxial tensile test and Vickers hardness test), and compared with specific mechanical properties of solid material. A very good effect of chips compaction has been proved by KoBo method, which has been confirmed by relatively slightly different mechanical properties of the material after consolidation compared with the solid one.
Highlights
Manufacturing metal objects leads to a great amount of scrap material, such as: chips, cuttings or defective components
The whole process requires several intermediate operations: cleaning, dying, compacting, etc. as well as high energy usage, causing these conventional technologies to be inadequate for the modern industrial needs. There exists another method of metal waste management, which involves its direct conversion into solid material
There are great literature reports concerning the consolidation of metallic chips based on the traditional plastic deformation processes (e. g. high-temperature extrusion) [10-22]
Summary
Manufacturing metal objects leads to a great amount of scrap material, such as: chips, cuttings or defective components. Aluminum machining chips are one of the most difficult types of scrap to recycle using traditional methods of remelting It is characterized by elevated surface/volume ratio and it is usually oxidized and covered by different types of contaminants (i.e. lubricants used for the machining process). As well as high energy usage, causing these conventional technologies to be inadequate for the modern industrial needs There exists another method of metal waste management, which involves its direct conversion into solid material. New methods of chip consolidation by low-temperature processes are being investigated Such a result can be obtained by the use of KoBo extrusion method [e. The essence of KoBo method is the change of strain path, which leads to the change of stress and results in lower extrusion force
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