Machining quality depends on numerous factors such as speed, feed rate, quality of the materials, the cutting fluids used and so on. The quality of machining components can also be improved by using appropriate cutting fluids. In this study, the three different types of eco-friendly cutting fluids based on coconut oil with nano boric acid particles were synthesized with nanoadditives and characterized during the lathe-turning operation of mild steel. The obtained results were compared between the dry/plain turning (without the cutting fluid) and the turning with the cutting fluids like coconut oil and mineral oil with nanoparticles. In industries, a wide variety of cutting fluids are used; however, most of these cutting fluids are made up of synthetic materials which may affect the environment significantly. Hence, it is essential to develop eco-friendly cutting fluids for environmental sustainability. Here, the cutting fluids were characterized by the morphological study on nanoparticles (400nm) and the machined surface using scanning electron microscope (SEM), viscosity test, flash and fire point, surface roughness on machined part, tool tip-workpiece interface temperature, cutting force and flank wear measurement. The results showed that cutting fluids with 0.5% of boric acid had better performance.

中文翻译：

---

用于车削操作的带有纳米添加剂的环保切削液的加工和表征

加工质量取决于许多因素，例如速度、进给率、材料质量、使用的切削液等。通过使用适当的切削液也可以提高加工部件的质量。本研究采用纳米添加剂合成了三种不同类型的基于椰子油和纳米硼酸颗粒的环保切削液，并在低碳钢的车削操作中进行了表征。比较了干式/普通车削（不使用切削液）和使用切削液（如椰子油和带有纳米颗粒的矿物油）进行的车削所获得的结果。在工业中，使用的切削液种类繁多；但是，这些切削液中的大多数是由合成材料制成的，这可能会对环境产生重大影响。因此，开发环保型切削液以实现环境可持续性至关重要。在这里，切削液通过对纳米颗粒的形态学研究（400nm) 和加工表面使用扫描电子显微镜 (SEM)、粘度测试、闪点和燃点、加工零件的表面粗糙度、刀尖-工件界面温度、切削力和后刀面磨损测量。结果表明，硼酸含量为0.5%的切削液性能更好。