Improvement of the Turbine Blade Surface Phase Structure Recovered by Plasma Spraying

Vitalii V Savinkin,Petrica Vizureanu,Andriana Surleva,Andrey A Ivanischev,Andrei Victor Sandu,Tatyana Yu Ratushnaya

doi:10.3390/coatings10010062

Abstract

This paper presents the results of research on the construction, technological parameters and criteria that control the process of formation of optimal phase structure of austenitic- and martensitic-class material for steam turbine blades. The hypothesis that the established correlation could increase the quality of blade recovery and its resistance against dynamic and vibrational loads was proved. The efficiency of the developed implantation method for the recovery of steam turbine blades was demonstrated. The optimal technological parameters of the process of laser plasma recovery were established empirically, allowing the development of the system for the fine tuning of the phase composition of austenitic- and martensitic-class steel.

Highlights

The development of the energy sector, CHP and hydroelectric power plants form the basis for the industrial and innovative development programs of any country, especially in areas with enough water resources [1,2]
Due to the physical characteristics of the coating formation process, internal stresses increase in the layer with increasing thickness, in turn impeding the process of adhesion with the underlying surface
In the course of the experiment at “Remplazma” LLP, it was found that the main parameters of the plasmotron are the distance of spraying l, particle velocity v, and granulometric composition by changing which it is possible to increase the utilization rate of the powder, adhesion strength and hardness of the coating

Summary

Introduction

The development of the energy sector, CHP and hydroelectric power plants form the basis for the industrial and innovative development programs of any country, especially in areas with enough water resources [1,2]. The implementation of energy-efficient technologies based on highly concentrated energy sources should ensure the development of domestic science and innovative technologies, and increase the competitiveness of energy products. The prospect of energy industry development is based on the introduction of innovative technologies that increase the efficiency of its infrastructure. The share of wear of turbine units of CHP and HPP in the global energy sector is about 65%, while the dynamics of prices for energy resources, repair and maintenance is progressively increasing

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