In this paper, the processes associated with the formation of the tungsten carbide phase are studied and determined. A plasma-compressed WC+12%Co powder is sprayed with a CDS-100 gun. WC+Co coatings are obtained by (High Velocity Oxygen Fuel technology. The coatings are characterized using scanning electron microscopy, energy dispersive system, and transmission electron microscopy in order to record and identify the tungsten carbide phase. The mechanisms for the formation of the tungsten carbide phase are discussed. Paper includes a German-language abstract.