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, a lower layer of niobium nitride is applied. Further, top layer of titanium, zirconium and chrome composition nitride is applied at the following component ratio, wt %: titanium 78.0-84.0, zirconium 6.0-10.0, chromium 8.0-12.0. Coating layers are applied by cathodes arranged in the same horizontal plane, where first cathode is composed of titanium and zirconium, second cathode is made of niobium 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 the second cathode, and upper layer - by first and third cathodes.

EFFECT: improving operability of a cutting tool.

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