Additive manufacturing of tungsten carbide (WC)-based cemented carbides and niobium carbide (NbC)-based cermets with high binder content via laser powder bed fusion
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The additive manufacturing technique performed via laser powder bed fusion has matured
as a technology for manufacturing cemented carbide parts. The parts are built by additive consolidation
of thin layers of a WC and Co mixture using a laser, depending on the power and scanning speed,
making it possible to create small, complex parts with different geometries. NbC-based cermets,
as the main phase, can replace WC-based cemented carbides for some applications. Issues related
to the high costs and dependence on imports have made WC and Co powders emerge as critical
raw materials. Furthermore, avoiding manufacturing workers’ health problems and occupational
diseases is a positive advantage of replacing WC with NbC and alternative binder phases. This work
used WC and NbC as the main carbides and three binders: 100% Ni, 100% Co, and 50Ni/50Co wt.%.
For the flowability and spreadability of the powders of WC- and NbC-based alloy mixtures in the
powder bed with high cohesiveness, it was necessary to build a vibrating container with a pneumatic
turbine ranging from 460 to 520 Hz. Concurrently, compaction was promoted by a compacting
system. The thin deposition layers of the mixtures were applied uniformly and were well distributed
in the powder bed to minimize the defects and cracks during the direct sintering of the samples.
The parameters of the L-PBF process varied, with laser scanning speeds from 25 to 125 mm.s–1 and
laser power from 50 to 125 W. Microstructural aspects and the properties obtained are presented and
discussed, seeking to establish the relationships between the L-PBF process variables and compare
them with the liquid phase sintering technique.
Como referenciar
MIRANDA, FABIO; SANTOS, MARCELO O. dos; CONDOTTA, RODRIGO; PEREIRA, NATHALIA M.G.; RODRIGUES, DANIEL; JANASI, SUZILENE R.; ORTEGA, FERNANDO dos S.; MERGULHAO, MARCELO V.; COELHO, RODRIGO S.; OLIVEIRA, RENE R. de; MARTINEZ, LUIS G.; BATALHA, GILMAR F. Additive manufacturing of tungsten carbide (WC)-based cemented carbides and niobium carbide (NbC)-based cermets with high binder content via laser powder bed fusion. Metals, v. 14, n. 12, p. 1-33, 2024. DOI: 10.3390/met14121333. Disponível em: https://repositorio.ipen.br/handle/123456789/49027. Acesso em: 26 Mar 2026.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.