FIELD: process engineering.
SUBSTANCE: invention relates to metal cutting tools. Proposed coating comprises at least one multiply with composite nano-ply composed of crystalline (TixAlyCrz)N and amorphous Si3N4, note here that 0.25≤x≤0.75, 0.25≤y<0.75, 0.05≤z≤0.2, 0.85≤x+y+z≤?0.,97mm. Atomic ratio of silicon makes 1-x-y-z and 1-x-z<0.,75, while nano composite ply depth makes 1-100 nm. Coating is deposited by physical deposition from vapour phase (PVD) at deposition temperature of over 500°C and at nitrogen partial pressure of at least 0.03 mbar.
EFFECT: higher strength of coating.
22 cl, 8 dwg, 3 ex, 3 tbl
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