Abstract
The article presents the results of the study of material entrainment (erosion) of the most heatstressed nodes of the three-phase alternating current plasma torch "Zvezda" of megawatt power: electrodes and confusers. The data on entrainment were obtained by weighing the studied nodes after their cycles of operation at fixed modes. Air was used as the working fluid. The operating modes of the plasma torch varied in the ranges of arc power 0.5–1.2 MW, cur-rents 160–400 A, gas flow 70–170 g/s. When using different output nozzles, the pressure in the plasma torch varied from 0.2 to 1.65 MPa. The influence of various parameters of the operat-ing mode on the service life of the plasma torch is shown. Using the obtained data on the ero-sion of electrodes and confusers, their resource was evaluated.
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