Abstract: The present invention relates to a method for manufacturing a gas turbine rotor heat shielding segment, which is mounted on a rotor outer wall between a compressor and a turbine and shields the leakage of heat and gas so that gas of high-temperature and high-pressure is not transferred from a burner of a gas turbine to a rotor shaft during the operation of the gas turbine, and more specifically, to a method for manufacturing a gas turbine rotor heat shielding segment by three-dimensional printing, wherein a portion having a simplified shape is manufactured by casting, and a portion having a complex shape is manufactured by 3D printing.

Abstract: The present invention relates to a method for manufacturing a labyrinth seal for a turbine through the additive manufacturing of martensitic stainless steel using 3D printing, the method including the steps of: making a ring-shaped body of the labyrinth seal by means of centrifugal casting or a ring mill and a labyrinth part protruding from one surface of the ring-shaped body of the labyrinth seal by means of the 3D printing; and depositing a bonding layer onto top of the ring-shaped body to improve a bonding force between the ring-shaped body and the labyrinth part, the bonding layer having a composition similar to the composition of the metal powder or metal wire used in the 3D printing.

Abstract: A method of manufacturing a labyrinth sealing device mounted between a diaphragm and a turbine rotor of a turbine to induce smooth rotation of the turbine rotor and prevent a leakage of gas by minimizing friction is presented. A labyrinth sealing device includes a ring-shaped body and a labyrinth part protruding from one surface of the ring-shaped body. The ring-shaped body is manufactured by centrifugal casting or ring mill, and the labyrinth part is manufactured by 3D printing.