In this paper, the tungsten carbide coatings are attempted under power consumed of 1.8-5.6 kW and plasma gases of argon and Ar-hydrogen or Ar-nitrogen. Metal base toilet layers are produced using low-energy plasma spraying (1.8 - 5.6 kW) with internal injection. The powder is injected directly between the cathode and anode. The effects of the plasma gas composition, the voltage, and the current on phase formation, hardness, and porosity of the WC layers are examined, as were those of the spray parameters on the injection behavior of the particles onto the nozzle surface. There is a tendency for less particle adherence to the nozzle to result from higher voltages, lower currents, and changed plasma gas composition. Paper includes a German-language abstract.