FIELD: equipment for plasma treatment of railway wheels. SUBSTANCE: plasmotron has working gas flow converter whose end surface conforms with that of working part of ridge and rounded-off surface of wheel. Slit-shaped opening of converter in area conjugating with ridge working surface has constant width and in ridge and rounded-off junction area it is made smoothly widened. Slit-shaped opening is extending over converter surface. Such shape of opening allows surface under process to be uniformly heated for producing strengthened surface of railway wheel. EFFECT: increased efficiency and improved quality of railway wheels. 4 cl, 2 dwg
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