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, aluminium and chromium is deposited at the ratio in wt %: titanium - 70.5-79.5, aluminium - 14.0-20.0, chromium - 6.5-9.5, while intermediate layer is deposited at the ratio of, in wt %: titanium - 80.5-87.5, aluminium - 6.0-10.0, chromium - 6.5-9.5, and top layer is deposited at the ratio of, in wt %: titanium 85.0-90.0, aluminium 10.0-15.0. Coat layers are applied horizontally in one plane by three cathodes, first and second being made composed of titanium and aluminium and arranged in opposition. Third composite cathode is made of titanium and zirconium 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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