Abstract This novel work analyzes different cooling and lubrication techniques namely without coolant (i.e. dry), with coolant (i.e. flood), and cryogenic with LCO2 and LN2 when drilling titanium alloy. The number of holes drilled for dry, with coolant (flood) and cryogenic with LCO2 and LN2 are 20, 140, 202 and 293 respectively before reaching tool wear criteria. Also, the better results of surface finish, power consumption, hole quality indicators, microhardness and chip analysis were observed for cryogenic machining with either LCO2 or LN2 in contrast with dry and flood machining. These results establish cryogenic LN2 and LCO2 as sustainable cooling and lubrication techniques to reduce tool wear and power consumption, thus improving machining productivity and quality as compared to flood cooling.

中文翻译：

---

综合加工分析建立低温 LN2 和 LCO2 作为可持续冷却和润滑技术

摘要 这项新颖的工作分析了不同的冷却和润滑技术，即在钻削钛合金时不使用冷却剂（即干式）、使用冷却剂（即溢流）和使用 LCO2 和 LN2 的低温。在达到刀具磨损标准之前，干式、冷却剂（溢流）和低温用 LCO2 和 LN2 钻的孔数分别为 20、140、202 和 293。此外，与干式和溢流加工相比，使用 LCO2 或 LN2 的低温加工在表面光洁度、功耗、孔质量指标、显微硬度和切屑分析方面观察到了更好的结果。这些结果将低温 LN2 和 LCO2 确立为可持续的冷却和润滑技术，以减少刀具磨损和功耗，从而与洪水冷却相比提高加工生产率和质量。