METHOD OF MAKING MULTILAYER COATING FOR CUTTING TOOL Russian patent published in 2012 - IPC C23C14/06 C23C14/24 B23B27/14 

FIELD: metallurgy.

SUBSTANCE: lower layer from nitride or carnonitride of titanium and aluminium is deposited at the ratio in wt %: titanium - 85.0-90.0 and aluminium - 10.0-15.0, while intermediate layer of said components is deposited at the ratio of, in wt %: titanium - 80.0-88.0, aluminium - 6.0-10.0, niobium - 6.0-10.0, and top layer is deposited at the ratio of, in wt %: titanium 70.0-80.0, aluminium 14.0-20.0, niobium 6.0-10.0. Coat layers are applied horizontally in one plane by three cathodes, first and second being made composed of titanium and niobium and arranged in opposition. Third composite cathode is made of titanium and niobium and arranged there between. Bottom layer is applied using first and third cathodes, intermediate layer is produced by second and third cathodes while top layer is made by first and second cathodes.

EFFECT: higher wear resistance.

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