Warm compaction at lower temperature

The effects of powder temperature, die temperature, lubricant content and compacting pressure on the behavior of warm compaction at lower temperature were studied. The results show that the optimum die temperature and powder temperature are 120 and 100 ℃ , respectively. For Fe-1. 5Cu-0. 5C and Fe-1. 5Ni-0. 5Mo-0. 5Cu-0. 5C powders, the densities of 7. 42 and 7. 41 g/cm3 can be achieved at 686 MPa, respectively. Fe-1. 5Cu-0. 5C powders are more effective in warm compaction than Fe-1. 5Ni-0. 5Mo-0. 5Cu-0. 5C. For both powders, shrinkage takes place during sintering, which is beneficial to further increase density. High performance P/M gear with sintered density of 7. 34 g/cm3, sintered hardness of HRC 28 and heat treated surface hardness of HRC 54 can be produced through warm compaction at lower temperature. In a word, warm compaction at lower temperature will have a bright future because of the lower cost.