PART SURFACE ALLOYING PROCESS Russian patent published in 2015 - IPC C23C26/02 C23C10/30 C23C8/60 

FIELD: process engineering.

SUBSTANCE: invention relates to metallurgy and machine building, particularly, to metal hardening and can be used in production of parts operated under conditions of wear and alternating stresses. Proposed method comprises application of dressing in part surface section including alloying elements, heating of said section with applied dressing to above its fusion point. Heating of alloyed part surface section with applied dressing at the rate of 180-220°C to 1200-1250°C with holding fro 2-3 minutes. Along with heating of alloyed section, part surface is subjected to forced cooling by fluid coolant to derive heat inward the part from adjoining area alloyed section. In compliance with some version, alloyed is the part surface shaped to plate. Note here that fluid cools the plate opposite surface. Hollow part outer surface can be alloyed with fluid cooling the part cavity wall.

EFFECT: increased depth of diffusion layer, prolong thermal diffusion of surface saturation at high hardness.

3 cl