METHOD FOR MULTI-LAYER COATING OBTAINING FOR CUTTING TOOL Russian patent published in 2015 - IPC C23C14/06 C23C14/24 B23B27/14 

FIELD: metallurgy.

SUBSTANCE: vacuum plasma application of multi-layered coating is performed. First, lower layer of nitride of titanium, aluminium and chrome is applied at the following component ratio, wt %: titanium 70.5-79.5, aluminium 14.0-20.0, chrome 6.5-9.5. Then, an upper layer of niobium nitride is applied. Application of coating layers is performed with three cathodes located horizontally in one plane, the first one of which consists of titanium and aluminium alloy, and the second one consists of niobium and is located opposite to the first one, and the third one consists of titanium and chrome and is located between them. The lower layer is applied using the first and the third cathodes, and the upper layer is applied using the second cathode.

EFFECT: obtaining of multi-layer coating, which improves operability of cutting tool.

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