METHOD FOR DEPOSITION OF MULTI-LAYER COATING ONTO CUTTING TOOL Russian patent published in 2007 - IPC C23C14/24 C23C14/06 

FIELD: deposition of wear-resistant coatings onto cutting tools, possibly in metal working industry branches.

SUBSTANCE: method is realized by vacuum-plasma deposition of double-layer coating. Method comprises steps of depositing lower layer at nitrogen pressure 8 x 10^-4 Pa in chamber of installation; using nitride of titanium and zirconium or nitride of titanium and iron or nitride of titanium and silicon or nitride of titanium and aluminum for deposition of lower layer; using the same nitride alloyed with chrome for depositing upper layer at nitrogen pressure 4 x 10^-3 Pa in chamber of installation. In concrete variants of invention lower layer with thickness consisting of 25 -30% of the whole thickness of coating is deposited while the whole thickness of coating is in range 3 - 9 micrometers.

EFFECT: improved working capacity of tool, enhanced quality of working by such tool due to its increased wear resistance and cracking resistance.

2 cl, 1 tbl, 1 ex