Several current studies revolve around manufacturing components made by Inconel 718, one of the most used superalloys for crucial applications in modern aerospace and automotive industries, because its mechanical, chemical and physical properties lead to a complex and expensive machining of the material. The purpose of this research is to test PVD nanocomposite coatings for carbide tools made by Ti-Al-Cr nitrates in a Si-based amorphous matrix for turning direct-aged Inconel 718, under different cutting conditions. According to the results of a developed analytical model for optimization and the current usage in industry, a range of cutting speeds have been experimentally tested.