Prospects of the Production of Large Gas Turbine Unit Blades Using Directional Solidification

—The scientific, technical, and technological aspects of producing large blades of power gas turbine units (GTUs) are considered. The existing technologies and equipment used in the United States, Germany, and Russia for the production of power turbine blades made of high-temperature alloys with a directional and single-crystal structure are analyzed. The influence of directional solidification methods, the design features of specialized technological equipment, and the GTU blade size on the structural features, the dendrite size, and the porosity and growth defects of the structure is considered. The use of a liquid-metal coolant, namely, the tin melt, during the directional solidification of large GTU blades is concluded to provide the necessary thermal conditions for producing the blades of high-power power turbines.