高硅铝合金缸套材料摩擦磨损性能研究

采用坦克专用机油,分别加载100N、200N、800N,在不同时间条件下进行喷射沉积高硅铝合金与军用大功率发动机钢缸套材料的对比摩擦学性能试验、模拟发动机工况条件的摩擦配副试验．结果表明,高硅铝合金比钢缸套材料具有更优越的摩擦学性能．高硅铝合金的摩擦学机制分析表明,软基体上分布的高硬度质点相具有决定性作用,摩擦发生时高硬度质点相起到耐磨与支撑作用,软基体磨下的凹坑具有储油与润滑作用．磨痕分析表明,高硅铝合金中的高硬度质点能将42MnCr52钢基表面磨出划痕,证明了高硅铝合金中高硬度质点相的摩擦学作用．

The Friction Wearing Properties Research of High-Silicon Aluminium Alloy Cylinder Sleeve

With tank special purpose lubricating oil, 100N, 200N and 800N loading force and different loading times, it is researched that spray-formed high-silicon aluminium alloy and mihtary superpower engine steel cylinder sleeve materials were used for comparative friction test and friction pair comparision test under simulated engine work condition. The experiment results showed that high-silicon aluminium alloy showed more excellent wearing resistance compared with steel cylinder sleeve materials. The friction mechanism analysis of high-silicon aluminium alloy indicated that high-hardness particles in soft parent metal had determinative function, including wearing resistance and supporting ability when wearing happened. Dents on soft parent metal surface produced by friction could store oil and were helpful for lubrication. The friction trace analysis showed that high-hardness particles in high-silicon aluminium alloy could produce friction trace on 42MnCr52 steel surface, where friction function of high-hardness particles in high-silicon aluminium alloy is proved.