METHOD FOR OBTAINING MULTI-LAYERED COATING FOR CUTTING TOOL Russian patent published in 2012 - IPC C23C14/06 C23C14/24 B23B27/14 

FIELD: metallurgy.

SUBSTANCE: vacuum plasma application of multi-layer coating is performed. Lower layer of nitride or carbonitride of titanium, aluminium and silicon compound is applied at the following component ratio, wt %: titanium 87.7-91.9, aluminium 7.0-11.0, silicon 1.1-1.3. After that, intermediate layer of nitride or carbonitride of titanium, aluminium and silicon compound is applied at the following component ratio, wt %: titanium 93.7-94.9, aluminium 4.0-6.0, silicon 1.1-1.3. After that, upper layer of nitride or carbonitride of titanium and aluminium compound is applied at the following component ratio, wt %: titanium 91.5-94.5, and aluminium 5.5-8.5. 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 each other, and the third cathode is made from titanium and silicon alloy and located between them; at that, lower layer is applied using the first and the third cathodes; intermediate layer is applied using the second and the third cathodes, and upper layer is applied using the first and the second cathodes.

EFFECT: improving operability of cutting tool.

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