METHOD OF MAKING MULTIPLE-LAYER COATING FOR CUTTING INSTRUMENT Russian patent published in 2009 - IPC C23C14/06 C23C14/16 C23C14/34 B23B27/14 

FIELD: chemistry.

SUBSTANCE: invention relates to methods of depositing wear-resistant coating on a cutting instrument and can be used in metal working. An under layer is deposited from a nitride or carbonitride a compound of titanium, zirconium and iron with the following ratio of components, wt %: titanium 86.5-88.2, zirconium 10.0-11.0, iron 1.8-2.5; an intermediate layer from nitride or carbonitride of a compound of titanium, zirconium, silicon and iron with the following ratio of components, wt %: titanium 89.8-91.4, zirconium 6.7-7.5, silicon 0.7-1.0, iron 1.2-1.7; a top layer from nitride or carbonitride of a compound of titanium, zirconium and silicon with the following ratio of components, wt %: titanium 87.0-88.9, zirconium 10.0-11.5, silicon 1.1-1.5. Three cathodes are used, lying horizontally in the same plane. The first cathode is made from titanium and iron, the second from an alloy of titanium and silicon and is placed opposite the first, and the third electrode is made from titanium and zirconium and is placed in between.

EFFECT: increased efficiency of the cutting instrument.

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