Analysis of improvements in technological properties of WC-Co tool materials fabricated by spark plasma sintering
Journal Title: Journal of Achievements in Materials and Manufacturing Engineering - Year 2016, Vol 75, Issue 2
Abstract
Purpose: The technological properties of WC-Co tool materials fabricated by spark plasma sintering has been investigated.Design/methodology/approach: The technological properties has been investigated using instrumented indentation and a Vickers tip indenter with an applied load of 300 mN. SEM and LM methods were used to characterize the microstructure.Findings: The best results of nanohardness (2144 HV0.031), elastic modulus (673 GPa), susceptibility to brittle cracking (0.60 μm/N) and work cracking (0.09 μJ) were obtained by compacts spark plasma sintered for a holding time of 3 min and at a heating rate of 300°C/min from a WC-6Co premixed powder with a particle size of 100-200 nm.Practical implications: The nanohardness, elastic modulus, susceptibility to brittle cracking and work cracking have been studied.Originality/value: Investigations of the role of holding time and heating rate in the spark plasma sintering process of WC-6Co tool materials revealed that nanohardness, elastic modulus and susceptibility to brittle cracking increase with a decreasing holding time and heating rate in contrast to work cracking which decreased.
Authors and Affiliations
P. Siwak, K. Peta, D. Garbiec
Keywords
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