METHOD FOR OBTAINING MULTI-LAYERED COATING FOR CUTTING TOOL Russian patent published in 2010 - IPC C23C14/24 C23C14/06 

FIELD: metallurgy.

SUBSTANCE: method involves vacuum-plasma application of two-layered coating. As lower layer, there applied is composite titanium, zirconium and iron nitride, and as upper layer there applied is composite titanium, zirconium and chrome nitride. At that, the coating is applied by using three cathodes-evaporators located in horizontal plane, made from titanium with an insert. The first cathode is provided with a stainless steel insert, the second one - with a chrome insert, and the third one located between them - with zirconium insert. When lower and upper layers are applied, there alternatively used are cathodes-evaporators with stainless steel and chrome inserts together with the cathode containing zirconium insert.

EFFECT: increasing operability of cutting tool and treatment quality.

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