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, zirconium and chrome is applied at the following component ratio, wt %: titanium 78.0-86.0, zirconium 6.0-10.0, chrome 8.0-12.0. After that, intermediate layer of carbonitride of titanium, zirconium and chrome compound is applied at the following component ratio, wt %: titanium 78.0-86.0, zirconium 6.0-10.0, chrome 8.0-12.0. After that, upper layer of nitride of titanium and zirconium compound is applied at the following component ratio, wt %: titanium 85.0-91.0, and zirconium 9.0-15.0. 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 zirconium and located opposite to each other, and the third cathode is made from titanium and chrome 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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