Along with strengthening of people’s environmental protection awareness, the MQL technology has been used
in grinding, but its limited cooling effect cannot satisfy the requirement of heat transfer enhancement in the grinding area.
The new technology of nano-particle jet flow of MQL can effectively solve the heat transfer in the grinding zone and
enhance the lubrication characteristics as well. This paper studies mainly the grinding process of the single grain under the
condition of the nano-particle jet flow of MQL by establishing the kinematics model, elastic deformation model and
plastic accumulation model of the single grain and simulating the value of the surface topography of the single-grain
grinding workpiece with quenching 45# as the research subject. The results show that the grinding depth will exert a
certain influence over the material deformation on the surface of the workpiece, the pile height and the length of the
grinding crack. The yielding amount of the grain center δc and the elastic recovery amount of the materials on the surface
of the workpiece δw increases with the grinding depth. The height of the material accumulation increases with the
grinding depth. Furthermore, the change amplitude is large and the change gradient decreases correspondingly. The length
of the grinding crack increases with the grinding depth, and the grinding depth and the height of the material accumulation
have an approximate linear relationship.