Özet:

WC-content metal matrix composites (MMC), which have a wide usage area today, are essential engineering materials. These composite materials constitute a vital part of the cutting tool material industry. Co is the most commonly used binder matrix phase material for sintered carbides. Replacing Co with alternatives is a subject of intense interest in the scientific literature due to the price fluctuation caused by limited supply globally and especially its carcinogenic effects. This situation further increases the search for alternative binding matrices. Current studies seem to focus on different compounds and alloys. In this study, it is aimed to produce cheap MMC materials with reduced detrimental effects. MMC materials with different chemical compositions were produced by powder metallurgy method using WC, Fe, Ni, and C powders. In the experimental studies, the powders were pressed axially and cold isostatically and sintered in an unpressurized argon environment after homogeneous mixing. The produced samples' microstructure (density, phase) and mechanical (hardness, modulus of elasticity, fracture toughness) properties were investigated experimentally and empirically. The study investigated the effect of Fe, Ni and C additives in different ratios as the binding phase on the microstructure and mechanical properties. It has been determined that there is a critical ratio for Fe and Ni additives, and the addition of above the determined amount reduces the ampirical fracture toughness. The chemical composition with the most suitable content in the samples was determined according to the microstructure and mechanical properties.

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