锡对铸造铝-石墨颗粒复合材料摩擦性能的影响.pdfVIP

Dec．2007 铸 造 VO1．56 NO．12 FOUNDRY ·1281· 锡对铸造铝一石墨颗粒复合材料摩擦性能的影响 刘 波 (浙江海洋学院船舶与建筑工程学院，浙江舟山316004) 摘要：采用M一200摩擦磨损试验机，对加入固体润滑剂锡的铸造铝一3％石墨颗粒复合材料的摩擦性能进行试验研究， 研究表明：锡和石墨具有优越的协同润滑效应，加锡可极大提高铝．石墨颗粒复合材料的减摩性能，使有润滑的摩擦系 数达到O．004-0．005。同时锡和石墨的协同润滑作用存在最佳配合，在本试验条件下，加约7％的锡时，协同润滑效应最 佳。加锡不能改善干摩擦时铝一3％石墨颗粒复合材料的耐磨性，但能极大提高有润滑时复合材料的耐磨性。并对加锡 的铝一石墨颗粒复合材料的磨损机理进行了初步研究，其在干摩擦时的磨损机理为粘着迁移、粘着磨损和磨料磨损，在 半干摩擦时的磨损机理为疲劳磨损和磨料磨损。 关键词：铝一石墨颗粒复合材料；固体润滑剂；锡；协同润滑；摩擦性能 中图分类号：TB331；TG146．2 1 文献标识码：A 文章编号：1001—4977(2007)12—1281—04 Influence of Stannum on Tribological Behavior of Cast AIuminum·Graphite Particle Composites LlU Bo (School of Naval Architecture and Civil Engineering of Zhejiang Ocean University，Zhoushan 31 6004，Zhejiang，China) Abstract：The tribological behavior of aIuminum一3％graphite particle composites with addition of solid Iubricant stannum was investigated on M一200 friction and wear tester．The results showed that stannum and graphite are of excellent cooperating Iubrication effect．The anti—friction ability of the composites can be greatly enhanced by adding stannum and the friction coefficient in Iubricating sliding wear reaches 0．004—0．005．At the same time．the cooperating Iubrication effect of stannum and graphite has an optimum range of content．When stannum content is approximately 7％．the cooperating Iubrication effect is the best in this test．Wear resistance of the composites added with stannum can not be improved in dry sliding．but can be greatly improved in Iubricating sliding．The wear mechanisms of aIuminum一3％graphite particle composites added with stannum were also preliminary investigated．Th