METHOD OF PROTECTING BLADES OF A GAS TURBINE ENGINE FROM TITANIUM ALLOYS WITH AN ULTRAFINE-GRAINED STRUCTURE FROM DUST ABRASIVE EROSION Russian patent published in 2022 - IPC C23C14/16 C23C14/24 C23C14/48 F01D5/28 

FIELD: machine building.

SUBSTANCE: invention relates to machine building and can be used in aircraft engine building and power turbine building for protection of blade airfoil of compressor of gas turbine engine from titanium alloys. Method involves placing blades in a chamber of a vacuum unit, creating the required vacuum, ion cleaning of the blade surface and application of ion-plasma multilayer coating on it with specified number of pairs of layers in form of titanium with metal layer and layer of titanium with metal and nitrogen compounds, wherein during application of coating as metal in layers of titanium with metal and in layers of compounds of titanium with metal and nitrogen vanadium is used, in the process of applying the coating, the blade is rotated relative to its longitudinal axis to ensure the treatment of the entire working surface of the airfoil, coating is applied simultaneously on both sides of the blade from electric arc evaporators located in the peripheral part of the vacuum unit chamber at alternation of titanium evaporators with vanadium evaporators.

EFFECT: increased resistance of gas turbine engine compressor blades from ultrafine-grained titanium alloys to erosion destruction at simultaneous increase of endurance and cyclic durability.

6 cl, 1 dwg