Authors:
Sandra Tedeschi (1), Fransisca Pirone (1), Mattia Garabelli (1), Domenico Ruggiero (1), Gian Pietro De Gaudenzi (1)
1- F.I.L.M.S. S.p.A. – OMCD Group, Anzola d’Ossola (Italy)
Abstract:
The application of the Functionally Graded Materials concept to cubic carbide-free hardmetals is commonly associated with achieving optimized mechanical properties in different regions of an article. In this work, special attention is given to maximize the corrosion and wear resistance of an outer layer while keeping the toughness values of the bulk material. This involves a detailed examination of gradients in the alloying of the metallic binder. A Ni-based outer layer, featuring a composition known for corrosion resistance, is sintered over a Co-based bulk with a medium WC grain size distribution. The concentration gradients of Ni and Co, along with the influence on mechanical properties and corrosion resistance, are thoroughly assessed. This analysis extends to the effects of additives such as chromium, molybdenum, with copper considered as an additional additive. The results reveal a promising path for the development of innovative hardmetal solutions in demanding applications.
DOI:
https://doi.org/10.59499/EP246278565
