METHOD FOR CHEMICAL-THERMAL TREATMENT OF PARTS MADE FROM NICKEL-BASED ALLOY Russian patent published in 2016 - IPC C23C8/02 C23C8/36 C23C14/48 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy, particularly to methods for chemical-thermal treatment of parts made from nickel-based alloy, and can be used for production of parts units of gas turbine hot section of aircraft engines, stationary gas-turbine plants and other items operating at high temperatures. Method for chemical heat treatment of parts made from nickel-based alloy comprises placing part in working chamber, activation of surface of part before chemical-thermal treatment, feeding into chamber a working saturating medium, heating part to temperature of chemical-thermal treatment and holding at said temperatures to form required thickness of diffusion layer. Activation of surface of part before chemical-thermal treatment is carried out by means of ion-implantation treatment of surface of part at ion energy from 35 to 50 keV, radiation dose of 1.2·10¹⁷ cm^-2 to 1.6·10¹⁷ cm^-2, radiation dose accumulation rate of 0.6·10¹⁵ s^-1 to 0.9·10¹⁵ s^-1, and implanted ions used are ions of C, N, Cr, Y, Yb or their combination. In particular embodiments of invention, chemical-thermal treatment of parts is performed by ion-plasma nitriding, or ion-plasma cementation, or ion-plasma nitro-carbonisation.

EFFECT: higher efficiency and quality of chemical heat treatment, higher wear resistance of parts after chemical-thermal treatment.

3 cl, 1 ex