engleski

Erosion Wear Resistnace of Nanostructured Cemented Carbides

Increasing the erosion resistance of cemented carbides is one of the main goals of finding new areas of application appropriate to the characteristic properties of these materials. Particle erosion is a real occurrence seen in every tribosystem where interaction between solid particles and a solid body is present at speeds greater than 1 m/s. Numerous components of machine systems such as water jet cutting nozzles with speeds exceeding 1 m/s in their work are exposed to erosion-related wear which can be influenced by regulating the grain size of the carbide phase and reducing the binder content. Resistance to erosion of hard metals with 10% and 15% Co was investigated using a specially made device in such a way that the erodent SiO2 and steel balls, flows in free fall through the system and strikes the rotating samples. Examined nanostructured cemented carbides were subjected to erosion in a 45 ° angle of impact, and erosion progression was monitored at intervals of 15 min for a total duration of 1 hour.

Nanostructured cemented carbides, WC-Co, wear, erosion

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