Owing to their superior features even under elevated temperatures, the nickel-based superalloy Inconel X750 is among the materials demanded in many critical areas. However, such alloys are hard to cut because of their characteristic properties i.e., strain hardening, poor thermal conductivity, high mechanical resistance at elevated temperature, the presence of abrasive carbide fragments and chemical proximity. Therefore, it is important to develop the machinability characteristics of these materials with sustainable machining methods that offer high performance. For this, in this work, a number of attempts were made during the milling of the Inconel X750 alloy. During the experiments, the performance of each cutting tool was investigated by considering three different tools which are uncoated carbide tool, cryogenically treated cutting tool and TiAlN coated tool. Since the machinability of superalloys is difficult in the dry environment, three different sustainable cooling/lubrication conditions such cryogenic LN₂, MQL and hybrid cooling/lubrication (MQL + LN₂) have been used in conjunction with these tools. In evaluating the effectiveness of the employed methods, flank wear, tool damage types, surface roughness/topography, cutting force and maximum temperatures were analyzed. As a result, even if the cryogenically treated tool performed slightly better than those of untreated, it still did not reach the performance level of the TiAlN coated tools. The hybrid cooling/lubrication system with coated tool offered the best solution in terms of all criteria. On the other hand, MQL outperforms LN₂ cooling for tool wear, surface roughness/topography and cutting force, LN₂ cooling is better than MQL in temperature reducing.

由于即使在高温下也具有卓越的特性，镍基高温合金 Inconel X750 是许多关键领域所需的材料之一。然而，此类合金难以切割，因为它们的特性包括应变硬化、导热性差、高温下的高机械阻力、磨料碳化物碎片的存在和化学接近性。因此，重要的是通过提供高性能的可持续加工方法来开发这些材料的可加工性。为此，在这项工作中，在 Inconel X750 合金的铣削过程中进行了多次尝试。在实验过程中，通过考虑三种不同的刀具，即无涂层硬质合金刀具，研究了每种刀具的性能。低温处理刀具和 TiAlN 涂层刀具。由于高温合金在干燥环境下的切削加工困难，三种不同的可持续冷却/润滑条件，如低温 LN_{如图 2 所示}，MQL 和混合冷却/润滑 (MQL + LN ₂ ) 已与这些工具结合使用。在评估所采用方法的有效性时，分析了后刀面磨损、刀具损坏类型、表面粗糙度/形貌、切削力和最高温度。因此，即使低温处理的刀具性能略好于未处理的刀具，但仍达不到 TiAlN 涂层刀具的性能水平。带涂层刀具的混合冷却/润滑系统提供了所有标准的最佳解决方案。另一方面，MQL在刀具磨损、表面粗糙度/形貌和切削力方面优于 LN ₂冷却，LN ₂冷却在降温方面优于 MQL。