Improving the quality of the manufacturing process of turbine blades of the gas turbine engine

Abstract

This paper describes the results of research and development work, which lead to an increase in the quality of the technological process of manufacturing the working turbine blades of a gas turbine engine. The mathematical description of the four-zone process of directional crystallization made it possible to select the most optimal thermophysical parameters of the casting process that affect the macrostructure of casting the blades. Digital modeling of casting technology, taking into account the proposed mathematical models, as well as the boundary, contact and initial conditions of the process, made it possible to most reliably describe the temperature front distribution in the crystallization zone at discrete points for any moment in any section. The temperature-Time optimization of the technological process for casting turbine blades made it possible to select the optimal temperature conditions for the respective areas of the foundry plant, which ultimately allowed a 20% reduction in rejects associated with the mismatch of the macrostructure of castings the blades to the standard.