METHOD OF PRODUCING MULTI-LAYER COAT FOR CUTTING TOOL Russian patent published in 2011 - IPC C23C14/24 B23B27/14 

FIELD: metallurgy.

SUBSTANCE: invention relates to method of applying wear resistant coats on cutting tools and can be used machine building. Vacuum plasma method is used to apply two-layer coat on cutting tool working surface. Titanium and molybdenum nitride or titanium and niobium nitride are applied as lower layer in installation chamber at nitrogen pressure of 7.5·10^-4 Pa and 600°C. The same nitride, chromium-doped, is applied as upper layer at nitrogen pressure of 4.3·10^-3 Pa and 500°C.

EFFECT: higher serviceability and quality of processing.

2 cl, 1 tbl