METHOD FOR MULTI-LAYER COATING OBTAINING FOR CUTTING TOOL Russian patent published in 2015 - IPC C23C14/06 C23C14/24 B23B27/14 

FIELD: metallurgy.

SUBSTANCE: vacuum plasma application of multi-layered coating is performed. First, lower layer of nitride of titanium, aluminium and chrome is applied at the following component ratio, wt %: titanium 70.5-79.5, aluminium 14.0-20.0, chrome 6.5-9.5. Then, an upper layer of chrome nitride is applied. Coating layers are applied by cathodes arranged in the same horizontal plane, where first cathode is composed of titanium and aluminium, second cathode is made of chromium and opposed to the first cathode, and third cathode is made of titanium and chromium and positioned between first and second cathodes. The lower layer is applied using first and third cathodes, the upper layer - by the second cathode.

EFFECT: obtaining of multi-layer coating, which improves operability of the cutting tool.

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