METHOD FOR PRODUCTION OF MULTI-LAYER COATING FOR CUTTING TOOL Russian patent published in 2016 - IPC C23C14/06 C23C14/24 B23B27/14 

FIELD: technological processes.

SUBSTANCE: invention relates to application of multi-layer coating on cutting tool and can be used in machining. Vacuum plasma sandwiched coating is applied. First, a lower layer of titanium nitride is applied. Then upper layer of titanium, aluminium and niobium nitride is applied at their ratio, wt %: titanium 76.7-82.7, aluminium 1.3-3.3, niobium 16.0-20.0. Coating plies are applied by three cathodes arranged horizontally in one plane. First and second cathodes are made of titanium and arranged opposite to each other, while third electrode is made of titanium, aluminium and niobium compound and located between them. Lower layer is applied using first and second cathodes, and upper layer is using all three cathodes. Application of bottom layer is performed at condensation temperature of 600 °C, and upper is at condensation temperature of 300 °C.

EFFECT: increased functionality of cutting tool.

2 cl, 1 tbl