The impact of different wires and coatings on cutting carbide hardness using wire EDM is examined in the thesis. In the study, four different wires were tested under the same conditions in a short period on a wire EDM machine for cutting carbide. During the cutting process, the time and weight of the consumed wire were measured to later calculate production economics. It was shown by the results that the fourth wire performed very poorly in cutting carbide. After the cutting process, dimensions, surface roughness, microhardness, and thickness of the white layer were measured. The measurements revealed that the third wire provided the fastest cutting and the best dimensions of the cut piece, making it the most cost-effective despite its high price. Excellent surface roughness resulted from the first wire, while the piece with the thinnest white layer was produced by the second wire. It is recommended that the company uses the third wire, as it is the most cost-effective and produces the most precise cuts.
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