발간논문

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Vol.17, No.6, 474 ~ 484, 1979
Title
A Study on Wear Characteristics of Graphite Dispersed Aluminum - Silicon Alloys
주웅길Woong Kil Choo, 홍주화Choo Hwa Hong
Abstract
The effect of silicon addition and graphite dispersion in cast aluminum alloys on the wear characteristics was investigated. The graphite particles were initially coated with copper by cementation process, and then dispersed into the alloy melt by vortex method. The wear rate was measured on pin-on-disk type wear test machine without any lubricant. The wear rate decreased as the graphite content increased. At the higher contact pressure the increase in wear resistance of graphite dispersed aluminum alloy became more apparent. At the sliding speed near 1m/sec, high wear rate due to the abrasive wear mechanism was observed. At the higher sliding speed than 8m/sec lower friction and wear rate were observed. The reduced friction and wear rate were attributed to adhesive surface wear mechanism. The reduction of wear by graphite dispersion was more effective at the slow sliding speed less than 1m/sec.
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