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首页> 外文会议>American Society of Mechanical Engineers(ASME)/Society of Tribologists and Lubrication Engineers(STLE) International Joint Tribology Conference 2004(IJTC 2004) vol.1 pt.A; 20041024-27; Long Beach,CA(US) >FRICTION AND WEAR CHARACTERISTICS OF Al-Si ALLOY IMPREGNATED GRAPHITE COMPOSITE UNDER LUBRICATED SLIDING CONDITIONS
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FRICTION AND WEAR CHARACTERISTICS OF Al-Si ALLOY IMPREGNATED GRAPHITE COMPOSITE UNDER LUBRICATED SLIDING CONDITIONS

机译：润滑条件下Al-Si合金浸渍石墨复合材料的摩擦磨损特性

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摘要

Friction and wear characteristics of Al-Si alloy impregnated graphite composite (ALGR-MMC) and its matrices (graphite and Al-Si alloy) in contact with bearing steel were investigated under lubricated sliding conditions. Pin-on-disk type wear experiments were conducted under dry sliding, drop-feed lubrication (0.005 to 1.00 cm~3) before sliding, and immersion lubrication (90 cm~3) by using engine oil. Changes in friction and wear were monitored continuously during the experiments. The friction coefficient and wear rate for the graphite decrease with increasing amount of oil drop but are higher than those of the Al-Si alloy and ALGR-MMC under immersion lubrication. For the Al-Si alloy, a breakdown of oil film occurs below 0.03 cm~3 of oil drop. After the breakdown of oil film, the friction coefficient and wear rate rise drastically, causing damage to the counter surface. A gradual decrease in friction and wear for the composite with increasing amount of oil drop is found without the breakdown of oil film and the damage of the counter surface. The friction coefficient and wear rate are much lower than those for the matrices. This indicates that the composite is one of the good sliding materials that can be used even under insufficiently lubricated sliding conditions.
机译：研究了铝硅合金浸渍石墨复合材料（ALGR-MMC）及其与轴承钢接触的基体（石墨和铝硅合金）的摩擦磨损特性。在干式滑动，滑动前滴加润滑（0.005至1.00 cm〜3）和浸入润滑（90 cm〜3）的情况下，使用机油进行销盘式磨损试验。在实验过程中不断监测摩擦和磨损的变化。石墨的摩擦系数和磨损率随着油滴量的增加而降低，但高于浸入式润滑条件下的Al-Si合金和ALGR-MMC。对于Al-Si合金，在油滴0.03cm〜3以下时，油膜破裂。油膜破裂后，摩擦系数和磨损率急剧上升，从而损坏了对置表面。发现随着油滴量的增加，复合材料的摩擦和磨损逐渐降低，而没有油膜破裂和相对表面的损坏。摩擦系数和磨损率远低于基体。这表明该复合材料是即使在润滑不足的滑动条件下也可以使用的良好滑动材料之一。

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