METHOD FOR OBTAINING MULTI-LAYERED COATING 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, chrome and niobium compound is applied at the following component ratio, wt %: titanium 79.0-85.0, chrome 9.0-11.0, niobium 6.0-10.0. Then, an upper layer of chrome nitride is applied. Coating layers are applied by cathodes arranged in the same horizontal plane, where first cathode is composed of titanium and chromium, second cathode is made of chromium and opposed to the first cathode, and third cathode is made of titanium and niobium and positioned between first and second cathodes. The lower layer is applied using first and third cathodes, the upper layer - by the second cathode.

EFFECT: improving operability of a cutting tool.

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