PROCEDURE FOR PRODUCTION OF MULTI-LAYER COATING FOR CUTTING TOOL Russian patent published in 2011 - IPC C23C14/24 C23C14/06 

FIELD: metallurgy.

SUBSTANCE: multi-layer coating is applied by vacuum-plasma procedure. A lower layer out of nitride or carbonitride of compound of titanium and chromium is applied at their ratio, wt %: titanium 91.5-93.5, chromium 6.5-8.5. Further, there is applied an intermediate layer out of nitride or carbonitride of compound of titanium, chromium and molybdenum at their ratio, wt %: titanium 88.5-92.0, chromium 4.0-6.0, molybdenum 4.0-5.5 and there is applied an upper layer consisting of nitride or carbonitride of compound of titanium, chromium and molybdenum at their ratio, wt %: titanium 83.5-87.0, chromium 9.0-11.0, molybdenum 4.0-5.5. Three cathodes arranged horizontally in one plane apply layers of coating. The first and second cathodes are made complex out of titanium and chromium and are arranged opposite to each other. The third cathode is also complex out of titanium and molybdenum and is installed between the first two. The lower layer is applied with the first and second cathodes, the intermediate layer is applied with the first and third cathodes, while the upper layer is applied with the second and third cathodes.

EFFECT: increased operability of cutting tool.

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