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利用球磨机将已制备的蛇纹石和SiC微纳米颗粒作为磨料挤渗镶嵌在铸铁气缸套内表面,采用往复式摩擦磨损试验机评价其耐磨性能,借助扫描电子显微镜(SEM)、能谱仪(EDS)对磨损表面及截面进行表征,探讨减摩抗磨机理.结果表明:当磨料为蛇纹石时所制备的气缸套强化层具有最佳减磨效果,其摩擦系数较珩磨气缸套降低约35%,磨损量降至1/3.微纳米颗粒被挤渗镶嵌在铸铁表面后,会作为支撑点和硬质相存在,起到支撑载荷和阻止基体变形的作用,有效降低了摩擦副的磨损.
The prepared serpentine and SiC micro-nano-particles were inlaid on the inner surface of the cast iron cylinder liner by using a ball mill. The reciprocating friction and wear tester was used to evaluate the wear resistance of the cylinder liner. Scanning electron microscopy (SEM), energy dispersive spectrometer EDS) was used to characterize the wear surface and cross-section, and the anti-friction and anti-wear mechanism was discussed.The results showed that the anti-friction and anti-wear mechanism of the cylinder liner had the best antifriction effect when the abrasive was serpentine, 35%, the amount of wear dropped to 1 / 3. Micro-nano-particles are infiltrated inlaid in the cast iron surface, as the support point and hard phase exist, play a supporting load and prevent the deformation of the substrate, effectively reducing the friction pair Wear and tear