METHOD OF CHEMICAL HEAT TREATMENT OF PARTS FROM TITANIUM-BASED ALLOY Russian patent published in 2017 - IPC C23C8/02 C23C10/02 C23C8/36 C23C14/48 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy, particularly to methods of chemical and heat treatment of parts from titanium-based alloy, and can be used in mechanical engineering for machines parts surface strengthening, including parts, operating in friction pairs. Method for chemical heat treatment of parts made from titanium-based alloy comprises placing part in working chamber, activation of surface of part before chemical heat treatment, feed a working saturating medium into chamber, heating to temperature of chemical heat treatment and holding at said temperatures to form required thickness of diffusion layer. Activation of surface of part before chemical heat treatment is carried out by means of ion-implantation treatment of surface of part at ion power from 30 to 40 Kev, with dose from 1.4⋅10¹⁷ cm^-2 to 1.8⋅10¹⁷ cm^-2, at dose build-up rate of 0.7⋅10¹⁵ s^-1 up to 1⋅10¹⁵ s^-1, wherein implanted ions are ions of following elements: C, N, or combinations thereof. In particular cases, chemical heat treatment of part is performed by ion-plasma nitriding or ion-plasma cementation or ion-plasma carbonitriding.

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

3 cl, 1 ex