Nickel-based superalloys, for instance Inconel 718, are applied in extreme conditions due to their excellent high-temperature strength. However, the same thermomechanical properties make the machining of Inconel 718 a challenge. Cutting fluids play a vital role in extending tool life as well as preserving surface integrity. Nevertheless, their effectiveness is naturally restricted by the fluid’s heat capacity. In order to improve cooling effectiveness, a new approach has been developed that combines high-pressure fluid supply and high cooling performance through the use of a deep temperature emulsion (DTE). Experimental and computational investigations were carried out on the high-speed turning of Inconel 718. Cutting forces, tool wear, chip formation and surface integrity were monitored. The experiments revealed that the addition of monoethylene glycol (MEG) reduces a cutting fluid’s freezing temperature but negatively affects the machining performance. However, the observed deficiencies are compensated by the benefits of cooling the cutting fluid. The cutting fluid at a temperature of T = −10 °C leads to comparable results to those of the reference process and even to further improvements in process performance. Therefore, the application of DTE could potentially outperform and ultimately replace conventional cooling strategies.

镍基超级合金，例如Inconel 718，由于其出色的高温强度而被应用在极端条件下。但是，相同的热机械性能使Inconel 718的加工成为一个挑战。切削液在延长刀具寿命以及保持表面完整性方面起着至关重要的作用。然而，它们的有效性自然受到流体的热容量的限制。为了提高冷却效率，已开发出一种新方法，该方法通过使用深温乳液（DTE）将高压流体供应和高冷却性能相结合。对Inconel 718的高速车削进行了实验和计算研究。对切削力，刀具磨损，切屑形成和表面完整性进行了监控。实验表明，添加单乙二醇（MEG）可以降低切削液的凝固温度，但会对加工性能产生负面影响。但是，观察到的缺陷可以通过冷却切削液的好处得到补偿。切削液温度为T  = -10°C可获得与参考过程相当的结果，甚至可以进一步改善过程性能。因此，DTE的应用可能会跑赢并最终取代传统的冷却策略。