FIELD: metallurgy; thermochemical treatment of parts; mechanical engineering. SUBSTANCE: method includes heating, saturation in powder-like medium containing boron carbide, nickel oxide, tetrafluoroborate of alkali metal, activator and corundum followed by cooling; boron-nickel plating is performed at temperature of 550-1000 C in powder-like mixture in which cuprous oxide is additionally introduced; potassium tetrafluoroborate is used as tetrafluoroborate of alkali metal; aluminum fluoride is used as activator at the following ratio of components, mas.%: boron carbide, 3-50; nickel oxide, 0.5-5; cuprous oxide, 0.05-2; aluminum fluoride, 0.05-12; potassium tetrafluoroborate, 0.05-2; corundum, 40-96.35; heating is performed in ammonia atmosphere; in the course of heating at temperature of 250-500 C, articles are kept for 3-40 min, after which gaseous products are discharged and saturation is performed at boron-nickel plating temperature. EFFECT: improved quality of articles at thickness of coat of 120-200 mcm, microhardness of 13,000 MPa and microfriability reduced by 1.5 times as compared with that of prototype.
