METHOD OF HARDENING TURBO MACHINE NOZZLE VANE UNIT MADE FROM NICKEL AND COBALT ALLOYS Russian patent published in 2012 - IPC B23P6/00 C23C14/06 C23C4/10 

FIELD: process engineering.

SUBSTANCE: invention relates to machine building and may be sued for improving operating performances of gas turbine hot section parts in aircraft, ship and power generating gas turbine engines: nozzle vanes including nozzle units segments made from nickel and cobalt alloys. Proposed method comprises forming refractory coat on surfaces of nozzle unit top and bottom flanges and vane body and applying thermal-protective ceramic layer only on outer surfaces of bottom flange and vane body and on surface of transition zone between top flange and vane body. Note here that thickness of said protective layer on different elements of nozzle units varies from 10 mcm to 300 mcm depending upon compensation of temperature difference of unit elements.

EFFECT: improved operating performances due to reduced destructive effects caused by notable thermal strains.

21 cl, 2 dwg, 1 ex