Method of treatment of steel parts surfaces. RU patent 2462517.

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.

1 ex

IPC classes for russian patent Method of treatment of steel parts surfaces. RU patent 2462517. (RU 2462517):

C23C26 - Coating not provided for in groups ; C23C0002000000-C23C0024000000

C21D1/78 - MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING, OR OTHER TREATMENTS (cementation by diffusion processes C23C; surface treatment of metallic material involving at least one process provided for in class C23 and at least one process covered by this subclass C23F0017000000; unidirectional solidification of eutectic materials or unidirectional demixing of eutectoid materials C30B)

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