METHOD FOR PRODUCTION OF MULTILAYER COATING FOR CUTTING TOOL Russian patent published in 2018 - IPC C23C14/06 C23C14/24 B23B27/14 

FIELD: technological processes.

SUBSTANCE: application of multilayer coating is performed. First, the bottom layer of titanium and chrome nitride is applied at the following ratio of the components, wt %: titanium 85.75-90.25, chrome 9.75-14.25. Then, the intermediate layer of nitride of titanium, chrome and aluminium compound is applied at the ratio of the components, wt %: titanium 70.5-79.5, chrome 6.5-9.5, aluminium 14.0-20.0. Then, the top layer of titanium nitride is applied. The coating layers are applied with the help of three cathode, which are horizontal in one plane, the first of which is composite of titanium and chrome, the second one is made of a titanium and aluminium alloy and located opposite the first one, and the third cathode is made of titanium and placed between them, while the bottom layer is applied with the help of the first and third cathode, the intermediate layer is applied using all three cathodes, and the top layer is applied with the help of the third cathode.

EFFECT: higher operating capability of the cutting tool.

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