METHOD FOR CHEMICAL-THERMAL TREATMENT OF PARTS MADE FROM TITANIUM Russian patent published in 2016 - IPC C23C8/02 C23C10/02 C23C8/36 C23C14/48 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy, particularly to methods for chemical-thermal treatment of parts made from titanium, and can be used in mechanical engineering for surface strengthening of parts of machines, including parts operating in friction pairs. Method for chemical heat treatment of parts made from titanium involves placing a part in a 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 30 to 40 keV, dose from 1.4·10¹⁷ cm^-2 to 1.8·10¹⁷ cm^-2, at a dose accumulation rate of 0.7·10¹⁵ s^-1 up to 1·10¹⁵ s^-1 and implanted ions used are ions of C, N 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