Pavlenko D. Technological assurance of quality characteristics of aerodynamic surfaces of compressor impeller blades made of heat-resistant nickel alloy ЭК79-ИД

The subject - blades of the D-27 engine centrifugal compressor wheel made in a high-temperature ЭК79-ИД nickel-based alloy, and also fine milling and deformation hardening techniques. The aim - a production support of quality characteristics of blade airfoils of the centrifugal compressor wheel, made in a high-temperature ЭК79-ИД nickel-based alloy by forming the efficient combination of performance of a surface layer of the blade airfoils at shaping and finishing treatment stages. The methods applied - X-ray structural, metallographical, engineering mechanics techniques, mathematical statistics methods, and numerical methods of a theory of elasticity. The results obtained - recommendations on assignment of mode for high-speed milling and deformation hardening of blades of the centrifugal compressor wheel made in a high-temperature ЭК79-ИД nickel-based alloy. A new structure of a convenient production process for treatment of the centrifugal compressor wheel blades made in a high-temperature ЭК79-ИДnickel-based alloy is proposed. Innovation - regularities of influence of high-speed 2-D milling modes on shaping of a surface layer of the blade airfoil quality characteristics were ascertained for the first time. Regularities of formation of the surface layer of the blade airfoil characteristics in the process of deformation hardening and its influence on the blade strength margin are assigned. The results have been implemented into production. The application sphere - aircraft engine manufacturers.