METHOD OF OBTAINING MULTI-LAYERED COATING FOR CUTTING INSTRUMENT Russian patent published in 2015 - IPC C23C14/06 C23C14/24 B23B27/14 

FIELD: chemistry.

SUBSTANCE: vacuum-plasma application of multi-layered coating is carried out. First, lower layer of nitride of titanium compound, aluminium and chrome with their ratio, wt %: titanium 70.5-79.5, aluminium 14.0-20.0, chrome 6.5-9.5 is applied. After that upper layer of titanium nitride is applied. Application of coating layers is realised by means of three cathodes, located horizontally in one plane. First cathode is made of titanium and aluminium alloy, second - from titanium with placement opposite to the first one, and third is made composite of titanium and chrome with placement between them. Lower layer is applied with use of first and third cathodes, with upper layer being applied with use of second cathode.

EFFECT: increased workability of cutting instrument.

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