Investigation of wear and diffusion processes on rake faces of carbide inserts with Ti-TiN-(Ti,Al,Si)N composite nanostructured coating

Influence of the Thickness of Multilayer Composite Nano-Structured Coating Ti–TiN–(Ti,Al,Si)N on the Tool Life of Metal-Cutting Tools and the Nature of Wear

“…To deposit the coatings, a VIT-2 unit was used (developed by IKTI RAN -MSTU STANKIN). One of the specific features of the VIT-2 unit is the use of arc evaporator with filtration of vapor-ion flow (FCVAD) [13][14][15][16][17][18][19][20], which makes it possible to obtain coatings with clearly defined boundaries of nanolayers. Coatings with three-layer architecture proved in [18][19][20] were deposited, and the Hume-Rothery rules [39] were followed to select the proportion of elements in the coating composition.…”

“…A sample with the thicker coating (8 μm) showed a longer tool life in nano-impact tests and the longest tool life in milling. The effect of the thicknesses of nano-structured coatings of different compositions on their wear resistance was also considered [13][14][15][16][17][18][19][20] (Ti-TiN-(TiCrAl)N and ZrN-(Zr,Al,Si)N [13,14], Zr-(Zr,Cr)N-CrN and Ti-TiN- Accordingly, with the increase in the thickness of a single layer of coating, its superficial hardness is reduced [1]. It can also be assumed that thin coatings have a higher mechanical strength than thicker coatings.…”

“…A sample with the thicker coating (8 µm) showed a longer tool life in nano-impact tests and the longest tool life in milling. The effect of the thicknesses of nano-structured coatings of different compositions on their wear resistance was also considered [13][14][15][16][17][18][19][20] (Ti-TiN-(TiCrAl)N and ZrN-(Zr,Al,Si)N [13,14], Zr-(Zr,Cr)N-CrN and Ti-TiN-(Ti,Cr,Al)N [15], Ti-TiCN-(Ti,Al)CN and Ti-TiCN-(Ti,Al,Cr)CN [16], Ti-TiN-(TiCrAl)N and Ti-TiN-(Ti,Al,Si)N [17], and (Ti,Al)N-(Zr,Nb)N-CrN [18][19][20]). It was also found that layered nano-structured coatings could have significant advantages compared to single-layer and monolithic coatings.…”

Influence of Thickness of Multilayer Composite Nano-structured Coatings on Tool Life of Metal-Cutting Tool

“…For t he co mparative t ests, t wo t ypes o f multilayered nano-structured co atings were s elected: T i-TiN-(TiCrAl)N a nd Zr-ZrN-(ZrCrNbAl)N, eac h with t hree different thickness (3, 5 and 7 µm). These coatings were selected as t he most e ffective o nes i n acco rdance with the r esults o f p revious te sts [11][12][13][14][15]. T he monolayered non-nano-structured c oating TiAlN with t hickness o f 4 µm, a s well a s carbide u ncoated i nsert were s elected as an object of comparison.…”

“…These coatings were deposited on car bide i nserts with s quare s hape ( SNUN I SO 1832:2012) and with the following geometric parameters of the cutting part: γ = -8°, α = 8°, K = 45°, λ = 0, and R = 0.8 mm. For deposition of coating, a vacuum-arc VIT-2 u nit [ 11,13] w as used, which was de signed f or t he synthesis of c oatings on s ubstrates of various t ool materials. The unit was equipped with an arc evaporator with filtration o f v apor-ion f low, which was named filtered cathodic vacuum-arc deposition (FCVAD) in this study [ 13], a nd was us ed f or de position of c oatings on tools to significantly reduce the formation of the droplet phase during coating.The cutting tests were carried out at the following cutting modes: f = 0.2 mm/rev; аp = 1.0…”