METHOD FOR PRODUCTION OF MULTILAYER COATING FOR CUTTING TOOL Russian patent published in 2018 - IPC C23C14/06 C23C14/24 B23B27/14 

FIELD: technological processes.

SUBSTANCE: method for production of multilayer coating for a cutting tool, in which ion-plasma application of multilayer coating is carried out, consisting of a lower nitride layer of titanium and silicon compound with component ratio, wt %: titanium 97.9-98.5, silicon 1.5-2.1, an intermediate nitride layer of titanium, silicon and molybdenum compound in component ratio, wt %: titanium 93.1 -95.0, silicon 1.0-1.4, molybdenum 4.0-5.5, and an upper layer - of titanium nitride. The coating layers are applied horizontally in one plane by three cathodes, the first of which is made of a titanium and silicon alloy, the second one is made of a titanium and molybdenum composite and is placed opposite the first, and the third is made of titanium and is placed between them. The lower layer is applied using the first and third cathodes, the intermediate layer - using all three cathodes, and the upper layer - using the third cathode.

EFFECT: increased cutting tool serviceability.

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