METHOD FOR RESTORING THE END PART OF THE FEATHER OF A COOLED TURBINE BLADE OF A GAS TURBINE ENGINE Russian patent published in 2022 - IPC B23P6/00 B23K26/146 F01D5/00 

FIELD: turbomachinery.

SUBSTANCE: invention relates to a technology for repairing cooled turbine blades of a gas turbine engine and can be used in turbomachinery. The method includes removing the heat-shielding coating to the base material, grinding the end of the blade airfoil to the end jumper, removing it and forming a groove for installing the end plate, fixing the end plate by welding, applying solder paste, attaching the end plate to the blade by high-temperature soldering in vacuum, machining, restoration well walls of the airfoil butt end by laser cladding, heat treatment in vacuum, mechanical treatment of surfacing deposits, luminescent control, restoration of the heat-shielding coating of the end part of the blade airfoil. The main material of the blade is a heat-resistant alloy containing up to 65% of the hardening γ' phase. Before restoring pulsed laser surfacing of the walls of the well of the end of the blade feather, the end plate is preheated by a laser beam by scanning the beam along the surface of the end plate to a temperature of 600-650°C.

EFFECT: invention ensures exclusion of crack formation during operation, improvement of repair quality and increase of life cycle of restored parts.

3 cl, 5 dwg