METHOD OF A SOLID ALLOY STRENGTHENING Russian patent published in 2018 - IPC C22F1/16 C22C29/00 

FIELD: technological processes.

SUBSTANCE: invention relates to the hardening of the surface of a carbide article. Method includes hydrochemical treatment of an article in a water-dispersed medium at a temperature not higher than its boiling with the formation of a strengthening phase on the surface and the final heating of the article at a temperature of 130–1,050 °C. Hydrochemical treatment is carried out for 10–40 minutes in a water-dispersed medium containing nano-oxide of silicon, manganese, tin, lead, cobalt, nickel, aluminum, molybdenum, zinc, antimony, vanadium, bismuth, boron, beryllium, zirconium, iron, chromium, tungsten, titanium or copper in a concentration of 0.4–50 g/l, a surfactant in a concentration of 0.4–50 g/l and alkali in the form of easily evaporable ammonia, with pH > 5 in the water-dispersed medium.

EFFECT: formation of a multilayer composite surface structure consisting of a solid lubricating layer, a transition layer and a matrix is provided.

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