FIELD: metallurgy.
SUBSTANCE: blades are subjected to diffusion annealing at temperature 850±10°C in vacuum during time interval facilitating formation of surface layer of blades identical to base metal of blades by strength; further, blades are mechanically cleaned at depth 15-30 mcm and are chemically treated. Diffusion annealing is carried out in vacuum of 10-3 mm of m.c. during 30-60 minutes. Surface layer of blades is mechanically treated by means of electro corundum.
EFFECT: production of strong surface layer identical to base metal of turbine impeller by chemical composition eliminating cracks and other defects on surface.
3 cl, 1 ex
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