Authors:
Mariana Pinto (1), Juliana Almeida (1), Alexandre Bastos (1), Joaquim Sacramento (2), Filipe Oliveira (1), Luís Filipe Malheiros (3), Pedro Pereira (2)
1- Department of Materials and Ceramic Engineering, CICECO, Aveiro, Portugal
2- DURIT, Metalurgia Portuguesa do Tungsténio, Lda., Portugal
3- INEGI, Department of Metallurgical and Materials Engineering, University of Porto, Portugal
Abstract:
The unfavourable corrosion behaviour of some hardmetal compositions is a main drawback for many applications. In wear parts operating in acidic media, cobalt (Co) is usually partially or totally substituted by nickel (Ni) and chromium (Cr) to increase the corrosion resistance. In hardmetals for metal forming tools, where high-volume fractions of binder are needed, the use of alternative binders, namely alloys of CoNiCr, is practically unexplored. Studying the corrosion and wear behaviour of hardmetals with high contents of these compositions is increasingly necessary for those applications. The degradation of mechanical properties induced by corrosion and wear damage that can decrease the service time of forming tools is an additional motivation for this research. This work studies the influence of binder composition in the performance of hardmetals with high binder contents in different tribological and corrosive environments, assessing the effects of partially replacing Co with simultaneous additions of Ni and Cr.
DOI:
https://doi.org/10.59499/EP246285835
