Increasing wear resistance of gas turbine engine blades on the basis of improving the process of thermoplastic hardening

The article describes a promising method for hardening treatment that improves the fatigue resistance of the surface layer of the blades of gas turbine engines (GTE), such as the thermoplastic hardening (TPH). It is shown the diagrams of a process for setting a hardening treatment. It is chosen the most rational modes of gas turbine engine blades hardening treatment plants for consideration for TPH. It is presented the principle of operation of installations for TPH and shown their basic design features. It is considered some types of equipment for the study of residual stresses and fatigue resistance. It is obtained the results of experimental studies of residual stresses and fatigue resistance for the consideration of plants for TPH. The results of the main conclusions are made: the greatest impact on the formation of residual stresses at thermoplastic hardening has the intensity of cooling, with an increase in which the value of residual stress increases; the optimum heating temperature is TPH 700 + 50 ° C and the pressure at the facility coolant cooling system with a controlled (1 - 1.5) MPa, the facility with the cooling system unregulated 0.54 - 0.6 MPa; hardening apparatus with controlled cooling system, as compared with hardening apparatus with irregular cooling system that increases the endurance limit at 3.5-5%, which prolongs the service life of the at 700-1000 hours.