Enhancing cutting performance of uncoated cemented carbide tools by joint-use of magnetic nanofluids and micro-texture under magnetic field

Abstract

Abstract In this study, the coupling effect of magnetic nanofluids and micro-textures under magnetic field on the tribological properties of uncoated tool is revealed for the first time. The micro-scale grooves parallel to the main cutting edge were fabricated on the tool rake face by laser processing (named TP), and for comparison the tools without surface texturing (named NT) were also prepared. Magnetic nanofluids with a solid content of 30% (named MN) were prepared as coolant for machining the workpiece, and the conventional cutting fluids (named CC) were also prepared for a comparison. At the same time, the magnetic nanofluids were applied to the cutting area by a novel machining setup, then the turning tests were accomplished to study the coupling effect of micro-texture and magnetic nanofluids (TP + MN) under different magnetic field strengths. The analysis of obtained results (cutting forces, surface roughness of workpiece after turning and tool wear) proves the advantages of the magnetic nanofluids and micro-texture under the magnetic field. In these experiments, under the highest magnetic field strength (40 kA/m), TP + MN has 48.6% lower cutting force and 49.1% lower surface roughness of machined workpiece compared to that of NT + CC. Additionally, the mechanism for the coupling effect of micro-textured tool and magnetic nanofluids under magnetic field wasalso revealed.