resumo
Joining cemented carbides and steels is particularly challenging due to the very dissimilar thermal properties that lead to high residual stresses at the interface, where in addition, brittle phases can be formed. An effective carbide-steel joint can unleash the creation of multi-material parts for several applications, and in this sense, it is of utmost importance to develop efficient methods for their fabrication. This work proposes a novel approach, using the high fabrication freedom of laser powder bed fusion technology to additively manufacture 316L stainless steel on a WC-Co substrate, to obtain complex multi-material cutting tools, with dissimilar materials in different locations. Results showed a good bonding between materials, since a dense, well-defined, and capable of withstanding cutting forces interface was obtained. The 316L stainless steel hardness ranges from 238 HV to 302 HV, with a direct correlation being found between the energy density used during laser powder bed fusion and the obtained hardness. This approach was found effective to produce multi-material WC-Co/316L stainless steel cutting tools with good metallurgical bonding and mechanical strength, without the need of adding an interfacial material.
palavras-chave
CEMENTED CARBIDE; WC-CO; MECHANICAL-BEHAVIOR; PROCESS PARAMETERS; HOLDING TIME; CARBON-STEEL; MICROSTRUCTURE; DIFFUSION; JOINTS; METAL
categoria
Materials Science; Metallurgy & Metallurgical Engineering
autores
Guimaraes, B; Guedes, A; Fernandes, CM; Figueiredo, D; Bartolomeu, F; Miranda, G; Silva, FS
nossos autores
Cristina Maria da Silva Fernandes
Colaborador
Georgina Miranda
Professor AuxiliarProjectos
CICECO - Aveiro Institute of Materials (UIDB/50011/2020)
CICECO - Aveiro Institute of Materials (UIDP/50011/2020)
Associated Laboratory CICECO-Aveiro Institute of Materials (LA/P/0006/2020)
agradecimentos
This work was supported by FCT (Fundacao para a Ciencia e a Tec-nologia) through the grant 2020.07155.BD and by the project POCI-01-0145-FEDER-030353 (SMARTCUT) . Additionally, this work was supported by FCT national funds, under the national support to R & D units grant, through the reference projects UIDB/04436/2020 and UIDP/04436/2020. Finally, this work was also developed within the scope of the project CICECO-Aveiro Institute of Materials, UIDB/50011/2020, UIDP/50011/2020 & LA/P/0006/2020, financed by national funds the FCT/MEC (PIDDAC) .