FIELD: metallurgy.
SUBSTANCE: method includes chrome-calorising in powder composition, following thermo-vacuum treatment by means of tempering, ceramic layer spatter ZrO2-8Y2O3 on front end edges of blades by electron-beam method and diffusion annealing for final formation of coating structure. Before the homogenising annealing on ceramic layer ZrO2-8Y2O3 by means of electron-beam method is spread ceramic layer ZrO2-11Y2O3-40Al2O3 of thickness 10-15 micrometer. Homogenising annealing is implemented with forming of coating structure on front end edges of blades, containing of [ZrO2-11Y2O3-40Al2O3]-(ZrO2-8Y2O3) - β+γ' - phase and turning into β+γ' - phase at the rest of blades areas.
EFFECT: increasing of durability and reliability enhancement of turbine blades.
2 dwg, 1 ex
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