Abstract：A simplified model of powder rolling process was established and the Drucker-Prager Cap constitutive model set in Abaqus software was used to analyze the influences of powder material properties, friction coefficient, gap between roller and ring die on the rolling process by finite element simulation technique. The results show that with the various powder materials, the extrusion pressure to form particles is also different. Stress imposed on the powder materials increases with the increase of friction coefficient and the decrease of gap between roller and ring die, it can make the material easier to be extruded from the die hole and improve the pellets quality.

Keywords：pellet; rolling; powder; ring die; simulation