Precision of Stainless Steel Turning Process Depending on Al₂O₃ Nano-coated Cutting Tool Wear

In the PhD Thesis a method for determining the roughness of a turned surface for hard-to-machine materials has been developed using increased processing parameters, the application of a turning process without cooling emulsion, using new cutting tools, and the cutting process has been investigated. The Thesis presents the study on the chip formation process and the result of cutting tool wear using the tools produced by different manufacturers. A literature review is presented and research directions are defined. The results of material turning of two groups of stainless steel structures are reviewed. Several mathematical models of the turning process have been developed for predicting surface roughness using regression analysis. The influence of material alloying elements on the chip formation process has been studied. The accuracy of the regression prediction models has been evaluated and an experimental model has been tested. Finite element method modelling of the turning process has been represented and the obtained data, which could not be obtained before, with the help of a practical experiment have been obtained.