WEAR-RESISTANT COATINGS FOR OPERATION OF MACHINING TOOLS IN HEAVY-DUTY CONDITIONS OF THE CONSTRUCTION INDUSTRY
Keywords:
vacuum, morphology, microhardness, altine, frictionAbstract
Increasing the service life of the processing tool in the construction industry is achieved by using various types of coatings. One of the promising areas for achieving a high service life is the use of vacuum coatings. Coatings based on titanium and zirconium compounds are known and widely used. However, three-component coatings based on aluminum-titanium-nitrogen are currently of interest from the point of view of technical application. The purpose of this work was to study the morphology and physical and mechanical properties of vacuum coatings obtained on the basis of altines. To study the characteristics of protective layers based on aluminum-titanium-nitrogen, modern research methods were used: optical and atomic force microscopy, microdurametry, tribological tests. It was found that the formation of three-component coatings based on aluminum, titanium and nitrogen allows the formation of highly hard coatings even at low values of the reaction gas in the vacuum chamber. The morphology of the formed coatings depends on both the potential supplied to the substrate and the pressure of the reaction gases in the vacuum chamber. The friction coefficient of AlTiN-based coatings depends on the magnitude of the vacuum that was created during the formation of the coatings using the plasma-chemical method.
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