Effect of Nanofluid on Cutting Temperature in Turning of Inconel 625 with Ceramic Tools

Abstract

Inconel 625 is used extensively in critical parts of aircraft, especially gas turbine engines. However, the high strength, which is one of the reasons of choice, considerably reduces the workability of this material. In such a case, the most preferred method is the use of cutting fluid. On the other hand, the fact that conventional cutting fluids adversely affect the environment, worker health and production costs concerns the enterprises. Recently, researchers and businesses have been working hard to reduce the amount of coolant without reducing production efficiency. In this study, some cooling/lubrication strategies have been tried to serve this purpose. In other words, the Minimum Quantity Lubrication (MQL) method and the MQL method containing 0.5% by volume nano Al2O3 additive were compared to dry processing. In addition, three different cutting speeds (120, 160, 200 m/min) and three different feeds (0.05, 0.1, 0.15 mm/rev) were chosen, as the behavior of the cooling / lubrication method under different cutting parameters was wondered. The Taguchi L9 vertical index was preferred for determining the number of experiments. Signal/Noise (S/N) ratio was effective in determining the optimum parameters. In addition, ANOVA analysis was performed to determine the effect levels of the parameters. In order to guide similar studies in the future, an estimation model was established through regression analysis. After the analysis of the test results, the optimum cutting temperature was obtained with a combination of vegetable cutting oil containing 0.5% Al2O3 by volume, cutting fluid of 120 m/min and feed rate of 0.05 mm/rev.