Analysis of Alligatoring Behavior during Roll Pressing of DRI Powder with Fiat Roller and Indentation-type Roller

摘要

A computational model for roll pressing of powder was developed based on an elasloplastic finite element method, and was applied to predict the alligatoring behavior at roll nip during powder compacting process. The yield criterion for powder has been implanted for the simulation of the roll pressing of Direct Reduced Iron powder with both flat roller and indentation-type roller. Calculated results could well explain the experimental observation that the indentation-typo roller is more useful to hinder in alligatoring.