Abstract
This work is devoted to an investigation of the hardness (H), modulus of elasticity (E), and adhesion-cohesion strength of ion-plasma vacuum-arc coatings of the Ti-Cr-Al-N system. It is shown that the magnitudes of H and E are determined by the crystallite size and microdeformation level. The maximum values of hardness (up to 32 GPa) and modulus of elasticity (up to 700 GPa) correspond to coatings with a minimal crystallite size and maximal magnitude of microdeformatons. Wear of coatings is accompanied by the cohesion destruction. The adhesion strength of coatings is evaluated at about 90 N. The resistance of the cutting hard-alloy tool with coatings for the continuous and interrupted cutting of 38XHMA steel has been increased by a factor of 5.1 and 5.7, respectively.
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