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

FIELD: metallurgy.

SUBSTANCE: method includes vacuum plasma application of multi-layer coating. Lower layer of titanium, zirconium and molybdenum nitrides is applied at the following ratio of components wt %: titanium 78.0-84.0, zirconium 6.0-10.0, chromium 8.0-12.0, and top layer of titanium nitride. 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 titanium and opposed to the first cathode, and third cathode is made of titanium and chrome and positioned between first and second cathodes. The lower layer is applied using the second cathode, and upper layer - by second cathode.

EFFECT: improved cutting ability.

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