抄録
Prevention of cracks during compaction is one of the most important quality issues in PM industry. Therefore,various types of the mechanisms of crack formation have been studied both from academic and practical point of view. However, the mechanism of the formation of the micro cracks, which are often formed on the boss near but not at the corner of a step, has not been clarified. In this study, to investigate the effects of compacting conditions on the micro crack formation, a powder mix of Fe – Cu – C system was compacted with a stepped die. The mechanism of the micro crack formation was discussed from the viewpoints of the experimental results and FEM analysis of powder compaction.
