Development of self-lubricating sintered plates by powder rolling method (1)

To develop self-lubricating sintered plates having high wear resistances for pressing machines and general industrial machines, powder rolling of premixed powders of Cu-28 wt%Ni-8 wt%Sn-5 wt%Fe-7 wt%(15P-Cu)-5 wt%C containing hydroxypropyl cellulose as an organic binder was performed. Keeping a constant depth of feed powder in the hopper, the rolling load depends on the roll gap at roll speeds from 0.3 to 0.7 m/min and the apparent density of the green sheet increases from 5.5 to 6.6 g/cm3 as the rolling load rises. The tensile strength of roll-compacted sheets produced at a roll speed 0.3 m/min and a roll gap -0.2, 0 and +0.3 mm depends on the sintering temperature. The sheet after sintering for 40 min at 1250 K showed a tensile strength of maximum 160 MPa.