METHOD FOR OBTAINING MULTI-LAYERED COATING FOR CUTTING TOOL Russian patent published in 2012 - IPC C23C14/24 C23C14/06 

FIELD: metallurgy.

SUBSTANCE: vacuum plasma application of multi-layer coating is performed. First, lower layer of nitride or carbonitride of titanium and chrome compound is applied at the following component ratio, wt %: titanium 91.5-93.5, chrome 6.5-8.5. After that, intermediate layer of nitride or carbonitride of titanium, chrome and zirconium compound is applied at the following component ratio, wt %: titanium 78.0-86.0, chrome 4.0-6.0, zirconium 12.0-16.0. After that, upper layer of nitride or carbonitride of titanium, chrome and zirconium compound is applied at the following component ratio, wt %: titanium 73.0-81.0, chrome 9.0-11.0 and zirconium 12.0-16.0. 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 chrome and located opposite each other, and the third cathode is made from titanium and zirconium and located between them; at that, lower layer is applied using the first and the second cathodes; intermediate layer is applied using the first and the third cathodes, and upper layer is applied using the second and the third cathodes.

EFFECT: improving operability of cutting tool.

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