ABSTRACT

In this study, face milling operation was carried out on an Inconel 625 superalloy. About 27 experiments (L₂₇) were conducted using Design of Experiments (DOE), which comprised three levels of cutting speed (V_c) and feed rate (f_z) with a constant cutting depth (a_p). The study included three coolant environmental conditions such as no coolant (dry), normal coolant (wet) and cryogenic CO₂ coolant. The output responses such as cutting temperature (T_s), cutting forces (F_x, F_y and F_z) and surface roughness (R_a) were observed during the experiments. The results were optimized using the TOPSIS technique with ANOVA tests. The optimization results of highest closeness coefficient (C_i) value indicated the lowest level of cryogenic CO₂ coolant environment and the input parameters were the cutting speed (V_c) 80 m/min and feed rate (f_z) 0.05 mm/tooth. The optimization results of the highest closeness coefficient (C_i) value were at cutting speed (V_c) 80 m/min, feed rate (f_z) 0.05 mm/tooth in cryogenic CO₂ coolant environment. The findings indicated that cryogenic CO₂ was both environmentally harmless and the best choice in comparison with dry and wet coolant.

摘要

在这项研究中，在Inconel 625高温合金上进行了端面铣削加工。使用实验设计（DOE）进行了大约27个实验（L ₂₇），该实验包括三个级别的切削速度（V _c）和进给速度（f _z），且切削深度（a _p）恒定。该研究包括三种冷却剂环境条件，例如无冷却剂（干），普通冷却剂（湿）和低温CO ₂冷却剂。输出响应，例如切削温度（T _s），切削力（F _x，F _y和F _z）和表面粗糙度（R在实验过程中观察到_a）。使用TOPSIS技术和ANOVA测试对结果进行了优化。最高闭合系数（C _i）值的优化结果表明低温CO ₂冷却剂环境处于最低水平，输入参数为切削速度（V _c）80 m / min和进给速度（f _z）0.05 mm /齿。在低温CO ₂中，最高闭合系数（C _i）值的优化结果是切削速度（V _c）为80 m / min，进给速度（f _z）为0.05 mm /齿时冷却液环境。研究结果表明，与干，湿冷却剂相比，低温CO ₂既对环境无害，又是最佳选择。