METHOD OF MAKING MULTIPLE-LAYER COATING FOR CUTTING INSTRUMENT Russian patent published in 2009 - IPC C23C14/24 C23C14/06 

FIELD: chemistry.

SUBSTANCE: invention relates to methods of depositing wear-resistant coating on a cutting instrument and can be used in metal working. Vacuum-plasma multiple-coating is done. An under layer is deposited from a nitride or carbonitride compound of titanium, molybdenum and iron with the following ratio of components, wt %: titanium 91.0-91.6, molybdenum 7.0-7.3, iron 1.4-1.7; an intermediate layer from a nitride or carbonitride compound of titanium, molybdenum, zirconium and iron with the following ratio of components, wt %: titanium 80.8-82.5, molybdenum 4.6-4.8, zirconium 12.0-13.3, iron 0.9-1.1; a top layer from a nitride or carbonitride compound of titanium, molybdenum and zirconium with the following ratio of components, wt %: titanium 72.8-75.1, molybdenum 6.9-7.2, zirconium 18.0-20.0. The coating layers are deposited using three cathodes lying horizontally in the same plane, the first of which is made from titanium and iron, the second from titanium and zirconium and is placed opposite the first, and the third from titanium and molybdenum and placed in between. The under layer is deposited using the first and third cathodes, the intermediate layer is deposited using all three cathodes and the top layer using the second and third cathodes.

EFFECT: increased efficiency of the cutting instrument.

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