Simulation study on the effect of grinding temperature and cooling rate on microstructure evolution of 9310 steel grinding surface

Abstract

The microstructure change of the workpiece surface during the grinding process will directly affect its mechanical property. Therefore, simulating the microstructure evolution process of the machined surface during the grinding process by establishing a mathematical model and obtain the influence of grinding temperature and cooling rate on grinding surface microstructure evolution, it is of great significance to guide the grinding process to obtain better machining quality. This paper defined the cellular automata rules for the nucleation and growth of lath martensitic, and established the microstructure evolution model during surface grinding of 9310 steel. By comparing the microstructure of the grinding surface obtained from simulation and experiment, it is found that the lath martensite is formed in the austenite in both of them, and the average grain size obtained from both of them is similar. Through the simulation analysis of the influence of different maximum grinding temperatures and cooling rates on the grinding surface microstructure evolution of 9310 steel, it is found that the smaller martensite microstructure can be obtained by decreasing the grinding temperature and increasing the cooling rate, thus the grinding surface has higher hardness and better wear resistance.