METHOD TO APPLY COMBINED PVD/CVD/PVD COATINGS ONTO CUTTING HARD-ALLOY TOOL Russian patent published in 2012 - IPC C23C28/04 C23C14/16 C23C16/30 B82B1/00 

FIELD: metallurgy.

SUBSTANCE: initially the surface of the specified tool is exposed to modification with chrome ions, and using the method of ion-plasma vacuum-arc deposition, a barrier layer of chrome is applied, then using the method of chemical deposition, layers are applied from a vapour and gas phase, and layers contain titanium carbide, titanium carbonitride and titanium nitride, modifying treatment is carried out with ions of titanium, and using the method of ion-plasma vacuum-arc deposition, a finish layer is applied from titanium nitride while supplying negative potential of 150-160 V to the deposited surface to form a nanostructure in it due to changing of crystallographic directions of titanium nitride grains.

EFFECT: higher reliability and resistance of a cutting tool when performing operations of continuous and interrupted cutting.

2 ex, 3 tbl, 4 dwg