METHOD FOR PRODUCING OF MULTIPLE-LAYER COATING FOR CUTTING TOOL Russian patent published in 2008 - IPC C23C14/32 B23B27/14 

FIELD: metal working, in particular, deposition of multiple-layer coatings onto cutting tools.

SUBSTANCE: method involves providing deposition of lower layer of nitride or carbonitride of titanium, aluminum and iron compound, used in the ratio, wt%: titanium 83.7-85.2, aluminum 13.0-14.2, iron 1.8-2.1; providing deposition of upper layer of nitride or carbonitride of titanium, aluminum and zirconium compound, used in the ratio, wt%: titanium 64.8-68.0, aluminum 12.0-13.2, zirconium 20.0-22.0; depositing said layers using three cathodes arranged horizontally in single plane, with first cathode consisting of titanium and iron, and second cathode consisting of titanium and zirconium and being positioned opposite first cathode, and third cathode consisting of titanium and aluminum and being positioned therebetween.

EFFECT: increased efficiency of cutting tools provided with such coating.

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