The problem of hard metal end milling cutter capacity for work increase on basis of tool physical stress strain properties modification by means of the formation of nano-structured multi level coatings on tool working surfaces with the use of filtered cathodevacuumarc deposition is developed. There is devel oped a system and a composition of three-component nano-structured multi-level composition modificating coatings for the deposition on working surfaces of end-milling cutters. The results of laboratory and industrial tests of end milling cutters with the developed coatings for the conditions of roughing and finishing are represented.
Some aspects of application for multilayered-composite functional coatings with nano-scale grains and layers thickness for various types of the cutting tool are considered. There is shown, that cutting tools with nanoscale structured coatings provide essential increase of cutting efficiency in comparison with standard coated tools of an adequate coating chemical compound.
The paper presents the results of research on improving the efficiency of end mills based on the application of functional coatings. The data on justifying the choice of composition, structure, architecture and properties of multilayer composite coatings for application to carbide end mills for machining of heat resistant alloys and structural steels are considered.
The paper presents the development of layered composite material, which includes a carbide substrate, a ceramic layer and a nano-scale multilayered coating. Each element of a layered tool material fulfills individual functions. The carbide layer provides raised toughness and strength of tool material, the ceramic layer provides resistance of a tool material to oxidation, corrosion and high-temperature weakening at elevated temperatures, the nano-scale multilayered coating decreases thermal-mechanical stresses on the rake face of the tool and eliminates superficial defects of the ceramic.
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