FIELD: repairing and strengthening mounting surface of working chamfer of exhaust valves of internal combustion engines by means of powdered alloys with predetermined properties. SUBSTANCE: method comprises steps of selecting parameters of electric current pulse according to conditions of accelerated heating (at period of that pulse) of melt along predetermined width of dressing and displacing melt towards periphery of formed welding bath and at pause between electric current pulses - holding and accelerated cooling of melt metal in dressing zone. Flowrate of plasma generating gas at period of electric current pulse and between electric current pulses is maintained constant. EFFECT: possibility for increasing width of layer fused at one pass, high quality of fusion. 5 dwg, 1 ex
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