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Recycling of tungsten carbide reclaim powder and ferro-titanit cromoni chips with the current supported sintering techniques SPS and EDS

: Schütte, P.; Moll, H.; Theisen, W.; Schmidt, J.

European Powder Metallurgy Association -EPMA-:
Euro PM 2011 Proceedings. Vol 3: Powder pressing, secondary & finishing, full density, sintering, tools for improving PM, PM applications : Powder Metallurgy Congress & Exhibition; 9th - 12th October 2011, CCIB Congress Centre, Barcelona, Spain
Shrewsbury: EPMA, 2011
ISBN: 978-1-89907-222-4
European Congress and Exhibition on Powder Metallurgy (EURO PM) <2011, Barcelona>
Powder Metallurgy World Congress & Exhibition (PM) <2011, Barcelona>
Fraunhofer IFAM, Institutsteil Pulvermetallurgie und Verbundwerkstoffe Dresden ()

Hard scrap of tungsten carbide originating from used and worn parts or waste products is often converted into usable raw material by a complex zinc reclamation process. Ferro-Titanit bars are dry machined to their final shape by what lots of valuable chips are generated, which can be collected afterwards. In this work new ways to recycle materials are presented. Both tungsten carbide reclaim powder and Ferro-Titanit chips are re-densified and therefore recycled to samples by the current supported sintering techniques Spark Plasma Sintering (SPS) and Electro Discharge Sintering (EDS). The resulting microstructure of the created samples is characterized by metallographic investigations and hardness measurements and discussed in comparison to the microstructure of conventionally produced parts. Further investigations of recycled material and conventionally produced parts are carried out by a pin on paper wear test and discussed regarding their wear resistance as it is one of these materials most important properties.