Simulation and Analysis on Effect of Pressing Processes and Height-diameter Ratio on Densification of Metal Powder

The metal powder compaction process was simulated by MSC.MARC FEM analysis software.The simulation applied elastic-plastic large displacement analysis based on the updated Lagrangian method was used to study the principle of the effect of different compacting processes(compacting style,friction condition) on the properties of pipe compacts which has different side pressing parameters.The results show that the double compaction process can improve the homogeneity of stress and density compared with single compaction.With the increase of height-diameter ratio,the distribution of stress and density in the compacts becomes more non-uniform,which is made by two kinds of processes.Improving friction condition is propitious to increase the displacement of metal powder,reduce the stress concentration,decrease compaction pressure force and improve the homogeneity of density in compacts.