METHOD OF CHEMICAL HEAT TREATMENT OF PART FROM ALLOYED STEEL Russian patent published in 2015 - IPC C23C8/02 C23C10/02 C23C8/36 C23C14/48 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy, in particular to methods of the chemical heat treatment of metals and alloys, and can be used in mechanical engineering for surface hardening of parts of machines, including the parts used in friction pairs, and also in cutting tools and die tooling. The method of the chemical heat treatment of a part from alloyed steel includes the placement of the part into the working chamber, activation of the part surface before chemical heat treatment, supply into the chamber of a working saturating medium, heating of the part to the temperature of chemical heat treatment and conditioning at this temperature until the formation of the required thickness of the diffusive layer. Activation of part surface before chemical heat treatment is performed by means of ion-implanted processing of the surface of the part at the energy of ions from 25 to 30 keV, radiation dose from 1.6·10¹⁷ cm^-2 to 2·10¹⁷ cm^-2, radiation dose set speeds from 0.7·10¹⁵ s^-1 up to 1·10¹⁵ s^-1 and when using as implanted ions of the following elements: C, N or their combinations. In special cases of the invention implementation the chemical heat treatment of the part is performed by a ion-plasma method. The ion-plasma method is the ion-plasma nitriding, either ion-plasma cementation, or ion-plasma nitrocementation.

EFFECT: increase of productivity and improvement of the quality of the process of chemical heat treatment, and also increase of the wear resistance of the parts after it.

3 cl, 1 ex