Abstract: To investigate the effect of nano MoS₂ concentration on minimum quantity lubrication(MQL)in grinding carbon fiber reinforced plastics(CFRPs)， the grinding experiments of CFRPs were carried out with lubricating oils of various concentrations(0%， 3%， 6%， 9%， and 12%)of nano MoS₂ in palm oil. The surface roughness and morphology of the CFRPs were studied by optical microscopy. The grinding forces were measured by dynamometer， and the grinding force ratio was calculated and analyzed. Also， the CFRPs grinding mechanism with MQL of various nano MoS₂ concentrations was explained. The results show that when the mass fraction of nano MoS₂ reaches 9%， the grinding force ratio reaches the lowest value of 0.0632， and the quality of surface roughness with R_○aof 1.86μm and surface morphology of CFRPs are both better than those with other concentrations.

Key words: CFRPs, nano MoS₂, MQL grinding, grinding force, surface roughness, surface morphology