Warm Flow Compaction Forming Process of 316L Stainless Steel Powders

Effects of compacting temperature and lubricant content on green density of 316L stainless steel powders were investigated under 500 MPa during warm flow compaction process.And cross-shaped parts with threaded holes were formed with pressure of 500 MPa and 4% lubricant content at 120 ℃.The results show that the maximum green density of 5.55 g·cm-3 could be obtained around the lubricant’s melting point of 120 ℃ during warm flow compaction forming.Green density increased with the increase of lubricant content while the maximum compacting pressure without cracks in compact decreased.Fine threaded holes in both vertical and lateral directions of cross-shaped parts prepared by warm flow compaction process could be obtained with pressure of 500 MPa and 4% lubricant content at 120 ℃.