PROCEDURE FOR CUTTING TOOL MULTI-LAYER COATING Russian patent published in 2011 - IPC C23C14/06 C23C14/34 

FIELD: machine building.

SUBSTANCE: two-layer coating is applied on working surfaces of cutting tool by vacuum-plasma procedure. As a lower layer there is applied titanium and molybdenum nitride or titanium and chromium nitride, or titanium and niobium nitride. As an upper layer there is applied the same nitride alloyed with silicon. Also, at application of layers temperature of condensation and pressure of nitrogen are different in each layer.

EFFECT: increased functionality of tool and upgraded quality of processing.

2 cl, 1 tbl