FIELD: metallurgy.
SUBSTANCE: it is implemented heating of products up to saturation temperature 450-780°C in ammonia atmosphere with following isolation in saturating gaseous medium. In the capacity of saturating medium at isolation there are used air and ammonia, which are fed separately. Isolation of products is implemented alternately in atmosphere, and then in the atmosphere of ammonia with formation on the surface of products of multilayer structure, consisting of alternating to each other layers made of oxide and nitride phases of iron and corresponding alloying elements.
EFFECT: there are received products with optimal combination of increased hardness and wear resistance, increasing of operation useful life of products, operating in heavy load conditions.
2 dwg, 1 tbl, 8 ex
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