PROCEDURE FOR CUTTING TOOL MULTI-LAYER COATING Russian patent published in 2015 - IPC C23C14/06 C23C14/26 B23B27/14 

FIELD: machine building.

SUBSTANCE: vacuum-plasma application of multilayer coating is performed. First, the lower titanium nitride layer is applied. Then the upper layer of titanium compound nitride is applied, silicon and niobium at the mass ratio, wt %: titanium 88.6-93.0, silicon 1.0-1.4, niobium 6.0-10.0. Coating layers are applied by three cathodes located horizontally in the same plane, the first of which is made from titanium and silicon alloy, the second one - from titanium and is placed opposite to the first, and the third is made compound from titanium and niobium and placed between them, and the lower layer is applied using the second cathode, and the upper layer - using the first and third cathodes.

EFFECT: improved serviceability of a cutting tool.

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