METHOD FOR OBTAINING MULTI-LAYERED COATING FOR CUTTING TOOL Russian patent published in 2013 - IPC C23C14/24 C23C14/06 

FIELD: metallurgy.

SUBSTANCE: method involves vacuum-plasma application of a multi-layered coating. First, lower layer of nitride of titanium, aluminium and niobium is applied at the following component ratio, wt %: titanium 80.0-87.3, aluminium 6.7-10.0, niobium 6.0-10.0. After that, intermediate layer of carbonitride of titanium, aluminium and niobium compound is applied at the following component ratio, wt %: titanium 80.0-87.3, aluminium 6.7-10.0, niobium 6.0-10.0, After that, upper layer of nitride of titanium and aluminium compound is applied at the following component ratio, wt %: titanium 85.0-90.0, and aluminium 10.0-15.0. Application of coating layers is performed with three cathodes horizontally located in one plane; the first and the second of the above cathodes are made from titanium and aluminium and located opposite to each other, and the third cathode is made from titanium and niobium and located between them; at that, lower and intermediate layers are applied using all the three cathodes, and upper layer is applied using the first and the second cathodes.

EFFECT: improving operability of a cutting tool.

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