PROCEDURE FOR CUTTING TOOL MULTI-LAYER COATING Russian patent published in 2015 - IPC C23C14/06 C23C14/24 B23B27/14 

FIELD: metallurgy.

SUBSTANCE: vacuum - plasma application of multilayer coating is performed. First, the lower molybdenum nitride layer is applied. Then the upper layer of molybdenum, silicon and niobium compound nitride is applied at their ratio, wt %: titanium 87.1-90.5, silicon 1.0-1.4, chrome 8.5-11.5. Coating layers are applied by three cathodes located horizontally in the same plane, the first of which is made from titanium and silicon alloy, the second one - from molybdenum and is placed opposite to the first, and the third is made compound from titanium and chrome and placed between them, and the lower layer is applied using the second cathode, and the upper layer - using the first and third cathodes.

EFFECT: improved serviceability of a cutting tool.

1 tbl