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

FIELD: metallurgy.

SUBSTANCE: two-layer coating is applied on working surfaces of cutting tool by vacuum-plasma procedure. Also, as a lower layer there are applied nitride of titanium and molybdenum or nitride of titanium and chromium, or nitride of titanium and silicon, or nitride of titanium and aluminium, or nitride of titanium and niobium, or nitride of titanium and zirconium. As an upper layer there are applied carbonitride of titanium and molybdenum, or carbonitride of titanium and chromium, or carbonitride of titanium and silicon, or carbonitride of titanium and aluminium. or carbonitride of titanium and niobium, or carbonitride of titanium and zirconium alloyed with iron.

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

2 cl, 1 tbl