Christos Pernagidis¹, Marian Harsani², Anas Ghailane^1
1, Avaluxe International GmbH, Fürth, Germany
², Staton, srl, Turany, Slovakia
Al₇₀Cr₃₀ targets provided by Avaluxe were compared to those from two other suppliers in terms of microstructure using SEM and XRD. The results were correlated to tool lifetime assessed by taking images, with optical microscope, of cutting tool flank and rake face, at cutting distances of 90m, 270m, 360 m and 450 m. The tools coated with AlCrN coating from Al₇₀Cr₃₀ Targets from Avaluxe started showing a wear at a distance of 450 m, while the other coatings showed failure at 90 m for supplier B and 270 m for supplier A. The cutting velocity was 100 m/min and the workpiece was steel 42crMo6.
The microstructure revealed that the Avaluxe Target, that showed better cutting performance, had the lowest lattice strain, the highest powder particle size, and a median crystallite size between supplier A and supplier B.
A possible explanation of this correlation in light of the effect on generation of droplets was discussed.