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Effects on part density for a highly productive manufacturing of WC-Co via laser powder bed fusion

: Polte, J.; Neuwald, T.; Gordei, A.; Kersting, R.; Uhlmann, E.

Leach, R. ; European Society for Precision Engineering and Nanotechnology -EUSPEN-:
21st International Conference & Exhibition of the European Society for Precision Engineering and Nanotechnology, EUSPEN 2021. Conference Proceedings : 7th-10th June 2021, Virtual Meeting
Bedford: Euspen, 2021
ISBN: 978-0-9957751-9-0
European Society for Precision Engineering and Nanotechnology (EUSPEN International Conference & Exhibition) <21, 2021, Online>
Conference Paper
Fraunhofer IPK ()

The additive manufacturing of parts made from difficult-to-weld materials through the usage of preheating temperatures of up to Î0 ⤠500 °C is enabled by newest L-PBF machine tools, such as the RenAM 500Q HT from the company RENISHAW PLC, Wottun-under-Edge, UK. This work aims to delevop processing parameters for the dense and crack-free manufacturing of tungsten-carbide cobalt (WC-Co) via this off-the-shelf machine tool. Therefore the laserpower and scanning speed were varied between 80 W ⤠PL ⤠350 W and 140 mm/s ⤠vS ⤠650 mm/s respectively. Furthermore the influence of a continuous and pulsed laser mode was analysed. A focus was set on the identification of parameters that enable a highly productive manufacturing while maintaining a high part density. A parameter set for relative density rel. > 94 % and a buildup rate v = 0.59 mm3/s was developed.