Basic Properties and Performance of Vegetable Oil-Based Boric Acid Nanofluids in Machining

摘要

Machining is one of the most basic and essential processes in manufacturing industry. Quality of the workpiece essentially depends on the heat generated in the cutting zone during machining. The usage of cutting fluids poses a question of risk to ecology and health of workers, in spite of their extensive use in dissipating the heat. This paves search for user-friendly and eco-friendly alternatives to conventional cutting fluids. Keeping this aspect in perspective, the present work deals with the application of nano solid lubricant suspensions in lubricating oil in turning of AISI 1,040 steel using carbide tool. Boric acid solid lubricant suspensions of 100 nm particle size are added to coconut oil. Particle size of nano-boric aicd is confirmed through particle analyzer. XRD analysis is done to assess the purity of the sample. On weight-percentage basis boric acid nanoparticles are added to the oil. The variation of its basic properties like flash point, fire point, viscosity, thermal conductivity, and heat transfer coefficient is evaluated. Cutting tool temperatures, average tool flank wear, and the surface roughness of the machined surface is examined in machining.