METHOD OF FABRICATING MULTILAYER COATING FOR CUTTING TOOLS Russian patent published in 2007 - IPC C23C14/24 C23C14/06 

FIELD: mineral protection coatings.

SUBSTANCE: invention relates to applying wear-resistant coatings for cutting tools used in metal machining. Method comprises vacuum-plasma deposition of two-layer coating, wherein basic coating is deposited under nitrogen pressure 8·10-4 Pa in interaction chamber and top layer is deposited under nitrogen pressure 4·10-3 Pa. Basic layer is constituted by titanium and aluminum nitrides or titanium and iron nitrides, or titanium and silicon nitrides. Top layer is formed from the same nitride constituents but alloyed with zirconium. In specific embodiments of invention, thickness of basic layer is 25-50% of the total thickness of coating and the latter is 3-9 μm.

EFFECT: increased wear and crack resistance of cutting tools.

2 cl, 1 tbl