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Conference Papers Year : 2023

Additive manufacturing of cermet produced by laser powder bed fusion using alternative Ni binder

Abstract

Cermets are composite materials made of a ceramic reinforcement and a metal matrix, generally cobalt as binder, with mass content from 6 to 20 wt.%. Cermets are produced by conventional sintering process and are known for their high hardness, low friction coefficient, high wear resistance, and high melting temperature. Laser Powder Bed Fusion (L-PBF) is an additive manufacturing technology widely applied for direct fabrication of functional metallic parts with complex geometry such as internal channels or lattices structures. Considering several studies, production of cermets by L-PBF process is challenging. Recent publications have demonstrated the feasibility to produce WC-Co parts by L-PBF combined with Hot Isostatic Pressure (HIP) heattreatment. HIP process is sometimes additionally performed as post-treatment to remove defects. HIP is performed at high temperatures and isostatic pressures in a furnace. In this study, following an experimental design a parametric optimization was conducted in order to maximize the mass density of WC-17Ni. Process parameters were compared to those used for WC-17Co parts from recent study. To improve the printed specimen integrity, the as-built samples were heat-treated. As-built and HIP samples were analyzed and compared in terms of mass density, microstructure, crystallographic phases, and macro hardness.
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emse-04395638 , version 1 (15-01-2024)

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Kevin Papy, András Borbély, Alexey Sova, Julien Favre, Philippe Bertrand, et al.. Additive manufacturing of cermet produced by laser powder bed fusion using alternative Ni binder. International ESAFORM Conference 2023, AGH University of Science and Technology, Apr 2023, Cracovie, Poland. pp.129-138, ⟨10.21741/9781644902479-15⟩. ⟨emse-04395638⟩
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