METHOD OF IMPROVEMENT OF OPERATION CHARACTERISTICS OF TURBINE MACHINE BLADES OUT OF ALLOYED STEELS Russian patent published in 2015 - IPC C25F3/24 

FIELD: metallurgy.

SUBSTANCE: method includes polishing of the blade body by electrolyte-plasma method including part immersion in the electrolyte, formation around the treated part surface of the steam-gas enclosure, and discharge ignition between the treated part and electrolyte by means of the electric potential supply to the treated surface, at that polishing of the blade body surface is performed by two stages: initially electrical potential is applied to the treated blade (from 320 V to 350 V), and polishing is performed until minimum possible at this voltage roughness, then voltage is gradually reduced to value from 270 V to 300 V, and final polishing is performed until minimum possible at this voltage roughness, at that water solution of ammonia sulphate salt with concentration from 6 to 12 g/l is used as electrolyte, and polishing is performed at temperature from 60°C to 80°C.

EFFECT: improved operation characteristics of blades of the turbine machines upon simultaneous decreasing of treatment labour intensity.

9 cl, 1 ex