Tribological Action and Optimal Performance: Research Activities Regarding MQL Machining Fluids

As an optimal fluid for MQL machining, this paper introduces some synthetic polyol esters having the high biodegradability, excellent oxidation stability and satisfactory cutting performance. The fundamental investigation demonstrates synthetic esters possess the preferable adsorption ability on to the freshly cut metal surfaces and this ability can be enhanced by surrounding oxygen. This may result in effective lubricating film formation and is probably in close connection with their satisfactory MQL cutting performance. A multifunctional fluid, which is applicable to both machining and other lubricating parts of machine tools, is further developed based on the synthetic ester for MQL machining.