Potential of Extrusion Based 3D-printed Hardmetal and Cermet Parts
Hardmetal and cermet bodies were printed by fused-filament fabrication(FFF)and composite-extrusion modelling(CEM)in an SDS(shaping – debinding – sintering)process.For FFF the filaments were prepared from hardmetal(WC-10Co)and cermet powder(Ti(C,N)-Co/Ni-based)and organic binder.The CEM feedstock consisted of WC-Co MIM powder.A 3D filament printer as well as a 3D printer working with a granulate such as used in MIM were employed to fabricate printed bodies by FFF and CEM,respectively.The solvent debinding process was performed in cyclohexane(FFF-printed bodies)or water(CEM-printed bodies).Thermal debinding of all parts was performed in a tube furnace up to a temperature of 800℃.The pre-sintered parts were then subjected to vacuum sintering by application of conventional vacuum sintering profiles up to 1430℃ for hardmetals and up to 1460℃ for cermets.Dimensional and mass changes upon the various preparation steps as well as microstructure and porosity of the sintered bodies were investigated.While the microstructure is practically identical to that of conventionally prepared materials,some cavities are present from the printing process because of yet non-optimised printing strategy.The study shows that with the applied 3D printing techniques,hardmetal and cermet parts with innovative geometries are accessible.
Kitzmantel Michael Lengauer Walter Duretek Ivica Schwarz Viktoria Kukla Christian Lieberwirth Clemens Morrison Vincent Wilfinger Thomas Neubauer Erich
RHP-Technology GmbH,A-2444 Seibersdorf;Vienna University of Technology,A-1060 Vienna Vienna University of Technology,A-1060 Vienna Montanuniversit(a)t Leoben,Dept.of Polymer Engineering Science,A-8700 Leoben Montanuniversit(a)t Leoben,Industrial Liaison Dept.,A-8700 Leoben AIM3D GmbH,D-18069 Rostock RHP-Technology GmbH,A-2444 Seibersdorf
国际会议
北京
英文
938-945
2018-09-16（万方平台首次上网日期，不代表论文的发表时间）