Evaluation via powder metallurgy of nano-reinforced iron powders developed for selective laser melting applications

摘要: Abstract In this work, a gas atomised stainless steel AISI 316L powder was used as metal matrix and SiC employed nano reinforcement. The powders were experimentally characterised to determine the effect of morphology, size, levels reinforcement on flowability. developed via metallurgy route material, process conditions various investigated through microhardness sintered samples. Sintered samples produced from 316L + SiC + PVA mixes presented improved hardness. Analysis Energy Dispersive X-ray measurements detected high intensity carbon silicon surface reinforced particles. terms measured rheology, 6 wt% coated provided highest flowability prepared much higher than received powder. All showed good highly repeatable rheology. degree attributed particle spherical narrow range size distribution also coating particles which found act in case solid lubricant. A successful homogeneous uniform onto resultant established mixing technique. While nano-SiC fluidity, obtained improvement hardness due dissolution precipitates formed during thermal treatment.