بررسي پارامترهاي ساخت و خواص تربيولوژيكي مواد اصطحكاكي سينترشده زمينه آهني

Fabrication and Tribological Properties of Iron-Based Sintered Friction Materials

Tribological characteristics of iron-based sintered friction materials were studied using a conventional pin-on-disk testing machine. The specimens of different compositions were compacted and sintered under controlled atmosphere in three different cycles. Friction coefficient and wear rates of composite specimens and cast iron disks were determined and worn surfaces were examined using scanning electron microscopy. Results show that the specimens prepared from ball-milled powder and also from large grain size iron powder were destroyed due to the lack of strength and excessive expansion. It is also observed that for other specimens prepared by a double cone mixer, the coefficient of friction and wear rate are strongly dependent on the contact surfaces behavior. Wear rate decreases with increasing load and sliding velocity in these specimens. Among different compositions, those containing Fe, Cu, G, BaSO4 showed better tribological behavior under higher load and sliding velocities.