Influence of Cutting Speed during the Turning of Inconel 718 on Oxidation Wear Pattern on the Zr-ZrN-(Zr,Mo,Al)N Composite Nanostructured Coating

The properties and oxidation wear patterns in the composite nanostructured coating of Zr-ZrN-(Zr,Mo,Al)N were studied during turning Inconel 718 alloy at cutting speeds vc = 125 200 m/min. hardness coating, its elastic modulus, critical fracture load scratch testing determined. study focused on tribological temperatures 400–900 °C paired with an insert made 718, which exhibited a certain advantage over reference coatings Zr-ZrN Ti-TiN-(Ti,Cr,Al)N similar thickness. provided for longest tool life speed m/min (the was four times longer comparison that uncoated 15% Ti-TiN-(Ti,Cr,Al)N-coated tool) 2.5 75% tool). While m/min, surface layers exhibit only partial external (to depth not exceeding 250 nm), mostly preserved cubic nitride phases, then leads to almost complete least 500 however, partially nanolayered structure coating.