The conventional cutting fluids are used in metal cutting processes for cooling and lubrication. However, the use of cutting fluids is creating the environmental and biological problems. In order to minimize these problems, it is essential to move towards sustainable cooling techniques. The present investigation determine the influence of sustainable cooling techniques such as cryogenic cooling, minimum quantity lubrication, Al₂O₃/soluble oil nanofluids based minimum quantity lubrication, SiC/soluble oil nanofluids based MQL and Al-SiC/soluble oil hybrid nanofluids based minimum quantity lubrication on output characteristics during turning of EN-24 steel. For experimentation nanofluids were formulated with accumulation of different weight percentages (0.5wt.%, 1.0wt.%, 1.5wt.%) of Al₂O₃, SiC and Al-SiC nanoparticles to the soluble oil. The thermal and tribological properties of Al₂O₃/soluble oil nanofluids, SiC/soluble oil nanofluids and Al-SiC/soluble oil hybrid nanofluids were analyzed. Individual machining performance such as surface roughness height, tool wear and specific energy lead to ambiguous understanding. So, the cumulative performance index is also calculated. The cumulative performance index is used to determine the performance of different sustainable cooling techniques during turning of EN-24 steel. The experimental results revealed that the turning performance of EN-24 steel under Al-SiC/soluble oil hybrid nanofluids based minimum quantity lubrication environment is superior then other machining environments.

Graphical Abstract

中文翻译：

---

EN-24钢车削过程中基于Al-SiC纳米流体的MQL可持续冷却技术的性能评估

常规切削液用于金属切削过程中以进行冷却和润滑。但是，使用切削液会造成环境和生物学问题。为了最小化这些问题，必须朝着可持续的冷却技术发展。本研究确定了可持续冷却技术的影响，例如低温冷却，最小润滑，基于Al ₂ O ₃ /可溶性油纳米流体的最小润滑量，基于SiC /可溶性油纳米流体的MQL和基于Al-SiC /可溶性油混合纳米流体的最小润滑在EN-24钢车削过程中对输出特性进行适量润滑。为了进行实验，配制了纳米流体，其中积累了不同重量百分比的铝（0.5wt。％，1.0wt。％，1.5wt。％）_将2 O ₃，SiC和Al-SiC纳米颗粒添加到可溶性油中。分析了Al ₂ O ₃ /可溶性油纳米流体，SiC /可溶性油纳米流体和Al-SiC /可溶性油杂化纳米流体的热学和摩擦学性质。诸如表面粗糙度高度，刀具磨损和比能之类的单独加工性能导致对模棱两可的理解。因此，还计算了累积性能指标。累积性能指标用于确定EN-24钢车削过程中不同可持续冷却技术的性能。实验结果表明，EN-24钢在基于Al-SiC /可溶性油杂化纳米流体的最小量润滑环境下的车削性能优于其他加工环境。

图形概要