Study on Thermal Erosion Process of SiCp/Al Composite Material in EDM

摘要

SiCp/Al composites are composed of two different material properties of aluminium matrix and SiC particles.In order to deeply study the erosion process of SiCp/Al composite in EDM,a single pulse discharge model of SiCp/Al composites was established.The melting and solidification model and the volume of fluid(VOF)model in Fluent software were used to simulate the thermal erosion process of EDM.The change of temperature field and the formation of molten pool in the heating process of SiC particles and Al matrix are analysed.The number of SiC particles in molten pool is counted and analysed,and the number of SiC particles in molten pool was counted,the simulation results were verified by the single pulse EDM experiments.The results show that the depth-diameter ratio of the molten pool increases with the increase of the pulse width,and decreases with the increase of the peak current.The number of melted particles in molten pool is basically unchanged.