METHOD FOR OBTAINING MULTI-LAYERED COATING FOR CUTTING TOOL Russian patent published in 2013 - IPC C23C14/24 C23C14/06 B23B27/14 

FIELD: metallurgy.

SUBSTANCE: first, lower layer of nitride of titanium, aluminium and molybdenum is applied at the following component ratio, wt %: titanium 85.5-89.8, aluminium 6.7-10.0, molybdenum 3.5-4.5. After that, intermediate layer of carbonitride of titanium, aluminium and molybdenum compound is applied at the following component ratio, wt %: titanium 85.5-89.8, aluminium 6.7-10.0, molybdenum 3.5-4.5. After that, upper layer of nitride of titanium and aluminium compound is applied at the following component ratio, wt %: titanium 85.0 - 90.0, aluminium 10.0 - 15.0. Coating layers are applied with three cathodes located horizontally in one plane. The first and the second cathodes are made from titanium and aluminium and located opposite each other, and the third one is made from titanium and molybdenum and located between them. Lower and intermediate layers are applied using all the three cathodes, and upper layer is applied using the first and the second cathodes.

EFFECT: improving operability of cutting tool.

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