Evaluation of wear resistance of tool coatings based on simulation modelling

This simulation study was aimed at developing rational recommendations on the selection of tool coatings when turning 09H17N7YU corrosion-resistant specialised stainless steel. The performed simulation, carried out in the Deform software environment, comprises the parameters of temperature, stress and deformation. The simulation results were compared with the operational parameters, i.e. the extent of tool material wear. Simulation modelling is performed for 11 various types of coatings on a VK8 hard-alloy substrate. A hard-alloy tool of the VK8 brand is taken as a base tool material. The other tool materials differ only in terms of the architecture (design, composition, structure and coating method) of the coatings applied to the VK8 substrate. Tool materials are distributed according to their rational application for processing 09H17N7YU corrosion-resistant specialised stainless steel, which has no analogues in terms of its physical and mechanical characteristics and operational properties. The application range of this steel is constantly expanding. It was found that the most rational multi-layer tool coatings for longitudinal turning of 09H17N7YU steel are TiCN (5 µm) + (TiAl)N (3 µm) + Al₂O₃ (5 µm) + TiC (5 µm); Al₂O₃ (2 µm) + (Ti)CN (5 µm) + (TiAl)N (3 µm) + TiN (3 µm); (TiAl)N (3 µm) + Al₂O₃ (3 µm) + (TiAl)N (3 µm) + Al₂O₃ (3 µm). The results of simulation modelling were tested experimentally. A good match of results was achieved (the regression coefficient varies between 0.9806 and 1.0). By means of the computer simulation, the most rational tool coatings required for turning of 09H17N7U specialised stainless steel were identified and experimentally proved.

simulation modeling, tool material selection, turning, hard-alloy substrate, steel, coating