FINISHING METHODS FOR GTE BLADES TO INCREASE THEIR SERVICE LIFE

Purpose. The purpose of the work is to analyze modern approaches and methods, extend the service life of compressor blades of gas turbine engines through the use of various individual and complex methods of surface treatment of parts. The final result of this analysis is a summary of data on the effectiveness of the individual use of each method separately and the effectiveness of the combined use of two or more methods simultaneously or sequentially. Based on the results of the summary, conclusions were made on the rationality of using complex approaches and directions for new research in the future were identified. Research methods. Literary sources were selected using the Google Scholar and Scopus bibliographic databases. The keywords for the search were «methods for strengthening blades», «complex technologies», «thermal methods», «chemical methods», «nitriding», «total resource», and «GTE compressor» in Ukrainian and English. Results. The main result of the work is a clear and detailed generalization and comparative analysis of the main methods of strengthening the blades of gas turbine engines. This generalization clearly demonstrates the advantages of using integrated approaches. The synergy effect of the simultaneous use of several technologies is considered in detail and confirmed by the results of reports on practical use and laboratory studies published by domestic and foreign scientists. Scientific novelty. A comprehensive systematization and comparative analysis of the effectiveness of individual and combined methods of surface treatment of gas turbine engine (GTE) blades has been performed, taking into account the depth of strengthening, resource increase, technological compatibility, and practical feasibility. A structured approach to assessing the synergistic effect of combinations of different methods (mechanical, chemical-thermal, thermal, ion-plasma) has been proposed, with the most effective technological combinations being identified. It is substantiated that the use of such combinations provides an increase in resource by 400–500% without changing the geometry of the part or base material, which opens up new opportunities for their implementation in serial production and repair of aviation equipment. Practical value. The results of the work can be used by engineers and researchers to familiarize themselves with modern diverse methods of increasing the resource of GTE scrap, the effectiveness of these methods, and the advantages of comprehensive approaches to the use of these methods in GTE production.