Abstract:
The machining of aluminum consumes less energy and allows for high feedrates. However, the material has higher coefficient of thermal expansion and modulus of elasticity, making it difficult to obtain parts with small tolerances and having the tendency to warp. The 6060 alloy is widely used in frames and includes magnesium, silicon, iron, manganese, and copper in its composition, forming intermetallic compounds that improve the machinability of the material, superior to other alloys. The heat generated during aluminum machining is mostly dissipated by the workpiece, causing deformations, handling difficulties, and reduced tool life, which can be mitigated by using cutting fluids based on inactive sulfurized mineral oils. In this study, surface analyses were performed using SEM, XRD, tribological studies in pin-on-disk mode, and nanoindentation on anodized 6060-T6 aluminum profiles, comparing two groups of samples machined with and without cutting fluid. Additionally, an immersion test was conducted on the samples. The results showed that the samples machined with cutting fluid exhibited higher surface hardness and lower coefficient of friction. SEM, EDS, and XRD analyses did not reveal the formation of oxides or surface alterations in the samples that underwent immersion or machining with cutting fluid.