METHOD FOR PRODUCTION OF MULTILAYER COATING FOR CUTTING TOOL Russian patent published in 2018 - IPC C23C14/24 C23C14/02 B23B27/14 

FIELD: technological processes.

SUBSTANCE: ion-plasma multilayer coating is applied. First, a lower layer of titanium nitride and aluminium is applied at the ratio, wt %: titanium 83.5-89.5, aluminium 10.5-16.5. Then, an intermediate layer of nitride of the titanium, aluminium and silicon compound is applied at a ratio, %: titanium 87.7-91.9, aluminium 7.0-11.0, silicon 1.1-1.3. The top layer is applied of titanium nitride. The application of the layers is carried out horizontally in one plane by three cathodes. The first cathode is made of an alloy of titanium and aluminium, the second is made of an alloy of titanium and silicon and is positioned opposite the first, and the third is made from titanium and placed between them. The lower layer is applied using the first and third cathodes, the intermediate layer - using all three cathodes, and the upper layer - using the third cathode.

EFFECT: cutting tool with a multi-layer coating is obtained with high wear-resistant and strength properties, and accordingly, the operability of the cutting tool is increased.

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