| Abstrakt: |
Abstract—Comparative durability tests of carbide cutting tools with (Ti, Al)N–Cu and (Ti, Al)N–Ni coatings applied to its working surfaces were carried out under conditions of continuous and interrupted cutting of steels 09G2S and EP302-Sh, respectively. Under milling conditions of EP302-Sh steel, using VK6NST inserts with (Ti, Al)N–Cu and (Ti,Al)N–Ni coatings, the tool life increases by 3.1 and 1.7 times, respectively. When turning the 09G2S steel using VK6NST inserts coated with (Ti, Al)N–Cu and (Ti, Al)N–Ni, the tool life increases by 7.6 and 10.8 times, respectively, and the cutting forces Fz, Fx, and Fy are reduced by ~20%. It is shown that this effect is determined by the presence of a nanostructure in the formed coatings and the presence of a highly consistent ceramic component and ductile metal, which determine their hardness (more than 35 GPa) and fracture toughness (relative work of plastic deformation during indentation over ~60%) and increased tribological characteristics (friction coefficient of ~0.5 compared to uncoated carbide of ~0.7). [ABSTRACT FROM AUTHOR] |
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