Anti-wear behaviors of nanofluids at the micro-textured tool/chip interface of CBN tools with electromagnetic field effects

Abstract

The micro-texture fabricated on the cubic boron nitride (CBN) tool surface is an established method for enhancing the penetration ability of nanofluids into the tool/chip interface. However, achieving efficient and continuous cooling lubrication at the micro-textured tool/chip interface continues to pose significant challenges. In this study, we employed an external magnetic field to enhance the permeability of nanofluids, while also taking into account the effects of electroosmosis. The turning experiments conducted on superalloys using micro-textured CBN tools (named TSN) have validated the effectiveness of the proposed method. By increasing the magnetic field intensity to 1200 Gs and integrating an electroosmotic accelerator into Fe₃O₄ nanofluids, the anti-wear properties of TSN were enhanced. This enhancement resulted in a reduction of cutting force by approximately 18 %, a decrease in cutting temperature by 9.1 %, and a reduction in surface roughness of machined workpiece by 43.04 %. Finally, the mechanism was discussed.