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, chrome and niobium 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 zirconium 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 zirconium 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: higher cutting efficiency.

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