Effects of Hard Oxides Reinforcing of Iron-Based MMCs on the Surface Topography Features after Finish Turning

Metal matrix composites (MMCs) are widely used in various industrial applications. Various types of reinforcing particles are added to MMCs to improve their mechanical and functional properties. Optimal processing conditions for the elements manufactured from MMCs ensure the efficiency of their use. This study describes the surface topography parameters of iron-based MMCs reinforced with graphite, alumina and zirconia nanoparticles depending on their percentage. The Simplex Lattice Design (SLD) method was used as the Design of Experiments (DoE) method and the range of additives change was 01 wt%. The specimens were machined under dry turning conditions using PVD-coated GC1115 carbide inserts. Depth of cut, cutting speed and feed values were stable, typical of finish turning. The surface topography was analyzed using Sensofar S Neox optical profilometer and Mountains Map software. Sa and Sz surface amplitude parameters, most widely used in the production industry, were evaluated according to ISO 25178-2:2012 standard. It has been shown that reinforcing additives and their amount in the mixture unambiguously affect the geometric features of the surface after turning process of the iron-based MMCs. Therefore, it is possible to select such a combination of particulates that will provide the expected quality of the machined surface.