METHOD OF THE GAS TURBINE ENGINE BLISK FROM TITANIUM ALLOYS PROTECTING AGAINST DUST ABRASION EROSION Russian patent published in 2018 - IPC C23C28/02 C23C14/02 C23C14/06 C23C14/16 C23C14/48 

FIELD: motors and pumps.

SUBSTANCE: performing the hardening treatment with microspheres, polishing of the blisk blades edges, blisk blades surface layer material ion-plasma modification with the ion-plasma multilayer coating subsequent application with a specified number of the layers pairs in the form of titanium with metal layer and a layer of titanium with a metal and nitrogen compounds. Before the surface layer ion-plasma modification, performing the blisk surface electrolyte-plasma polishing. Surface layer Ion-plasma modification is carried out with nitrogen ions at an energy from 0.2 keV to 2.5 keV, dose of 1.5⋅10¹⁹ cm^-2 up to 2.5⋅10¹⁹ cm^-2, current strength from 0.1 mA/cm² up to 3 mA/cm², at a current frequency of 70 to 100 kHz. When coating application, as a metal in the titanium with a metal layers and in the titanium with a metal and nitrogen compounds layers vanadium is used. In the process of ion-plasma treatment, the blisk is rotated relative to its longitudinal axis, giving it oscillatory movements ensuring its entire working surface processing.

EFFECT: proposed is a method of the gas turbine engine blisk from titanium alloys protecting against dust abrasion erosion.

11 cl, 1 ex