COMBINING ELECTROSTATIC DIE WALL LUBRICATION AND WARM COMPACTION TO ENHANCE GREEN AND SINTERED PROPERTIES OF P/M COMPONENTS

摘要

The achievement of high density at reasonable cost represents a definite advantage for the production of P/M components requiring high static and dynamic properties. The use of warm compaction combined with die wall lubrication appears as a very attractive route to promote densification. Several studies carried out at a laboratory scale confirmed the potential of this processing route. However, the real benefits of combining both techniques under industrial conditions need to be further explored. A study was conducted on an industrial mechanical press to determine to which extent the combination of both techniques can be useful in the achievement of higher density, and thus, higher mechanical properties. The benefits of this process in comparison with the conventional cold and warm pressing processes as well as the cold pressing process associated with the die wall lubrication technique were evaluated and are presented in this paper.