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本文研究了用中间法新工艺制造的铝石墨复合材料在高速高温下的摩擦磨损特性。试验在销盘式试验机上进行。滑动线速度最高达9.4米/秒。在2米/秒干摩擦时,所有测试的复合材料磨损量均小于基体合金。200℃时,含石墨2～5％的复合材料磨损量也此基体合金小。在9.4米/秒干摩擦时,含石墨2％的复合材料耐磨性能最好。以前曾有报导:滑动线速度大于1米/秒,铝石墨复合材料的磨损量大于基体合金。本文认为新工艺制造的复合材料在9.4米/秒的高速摩擦时摩擦系数和磨损量下降是由于石墨与基体界面结合良好。
In this paper, the friction and wear properties of Al-graphite composites fabricated by the intermediate process were investigated at high speed and high temperature. The test is done on a pin-plate tester. Sliding line speeds up to 9.4 m / s. At 2 m / sec dry friction, all tested composites wear less than the base alloy. 200 ℃, the graphite content of 2 to 5% of the composite wear of the matrix alloy is small. At 9.4 m / s dry friction, the composite containing 2% graphite had the best wear resistance. It has previously been reported that the slip line speed is greater than 1 m / s and the aluminum-graphite composites wear more than the base alloy. The paper concludes that the friction coefficient and wear loss of the new composite made at high speed of 9.4 m / s is due to the good interface between graphite and matrix.