Abrasive wear resistance of WC-based composites, produced with Co or Ni-rich binders

Influence of Spray Parameters on the Metallurgical and Functional Properties of HVOF WC Based Cermets Deposited onto Low Alloy Steel

“…Agglomerates of particles are then observed, reflecting a poor distribution of the binder around the WC particles. Incorporation of nickel was reported as a beneficial element that increases the wettability with the carbide particles [16]. The coating 4 (Figure 3d) sample was obtained using a lower flux of powder than that measured for all coatings.…”

“…The decrease in the powder feed rate allows a better distribution of the liquid binder around the tungsten carbide particles, thus limiting the phenomenon of surface oxidation. On the other hand, the decrease in particle velocity and temperature led to an increase in the content of W 2 C in the deposit, indicating significant decarburization related to these changes in deposition parameters [16].…”

“…The development of coatings by thermal spraying HVOF leads to a variation in the composition of species detectable in XRD. The evolutions obtained are dependent on the operating conditions of deposition and also the powder characteristic (particle size and powder fleed rate) [16,19,25,26]. Thus, decarburization is low for coatings 1 and 4.…”

“…The coatings have even a small amount of pores connecting to the substrate [14]. While a large variety of metallic matrix materials are available to incorporate with the WC grains, it has been reported that the best performance in terms of wear resistance is reached when cobalt, chromium and nickel are used for the binder [15,16].…”

Mechanical and Tribological Characterization of WC-Co and WC-AISI 304 Composites by a Newly Developed Equipment

“…Considering the reasons highlighted, it is necessary to find new solutions that allow the replacement of the cobalt binder by a more economical alternative, less toxic and with equal or superior properties. The alternative with the greatest potential is the total or partial replacement of cobalt by other transition metals such as Fe, Cr and Ni [ 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 ]. The traditional WC-Co has also some limitations with respect to corrosion resistance and in that sense the use of Fe and Ni based binders has been the target of research to improve this property in carbides [ 25 , 26 , 27 ].…”