METHOD OF TREATMENT OF STEEL PARTS SURFACES Russian patent published in 2012 - IPC C21D1/78 C23C26/00 

FIELD: metallurgy.

SUBSTANCE: cold plastic deformation of the treated surface is carried out during continuous feeding of radical-generating substance to the zone of deformation to achieve a given quantity of material hardening of the surface layer. This is followed by chemical and thermal processing of parts by heating of parts to the temperature of chemical modification of radical-generating substance at which the destruction of its molecules starts, the details are exposed at a given temperature at continuous supply of radical-generating substance within the time required for maximum saturation with radicals of the hardened surface layer. Before heating the parts, vacuum is generated in the chamber or shielding gas nitrogen is injected, and then the parts are heated, and radical-generating substance is a mineral oil.

EFFECT: increased purity and corrosion resistance of the surfaces of steel parts.

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