METHOD FOR APPLYING COMBINED HEAT-RESISTANT COATING TO TURBINE BLADES OF GTE Russian patent published in 2021 - IPC C23C28/00 C23C10/56 

FIELD: metallurgy.

SUBSTANCE: invention relates to the field of metallurgy and can be used in mechanical engineering to protect gas turbine engine parts from gas corrosion. The method for applying a heat-resistant coating to the turbine blades of a gas turbine engine includes chrome aluminizing, subsequent thermal vacuum treatment by quenching, spraying a layer of ZrO₂-8Y₂O₃ ceramics on the input edges of the blades by electron beam method and annealing. Chrome aluminizing is carried out at a temperature of 1190°C and holding time of 1 h 20 min. A layer of ZrO₂-8Y₂O₃ ceramics is sprayed with a thickness of 40-45 mcm. Before annealing, low-temperature chrome aluminizing is carried out at a temperature of 1050-1080°C for a thickness of 10-15 mcm. Annealing is carried out at a temperature of 850°C for 32 h with the formation of the coating structure consisting of B-( ZrO₂-8Y₂O₃)-B+G' phase on the front edge transforming into B+G' phase for the remaining sections of the blade.

EFFECT: invention increases durability and reliability of turbine blades operating under conditions of variable thermomechanical loads and high-temperature oxidation.

1 cl, 5 dwg, 1 tbl, 1 ex