低酸度乙醇润滑下几种活塞环材料的摩擦学性能研究

Tribological Research of some Piston Materials Lubricated by Alcohol with Low Acidity

通过SRV试验机考察了乙醇润滑条件下CrN、WS2、渗氮、B4C活塞环材料与气缸材料对磨时的摩擦学性能,通过SEM、EDX、表面形貌方法对磨损表面进行了分析。试验结果表明:在乙醇的酸度较低的情况下,乙醇对材料有某种润滑作用,磨损以粘着磨损为主;在几种摩擦副材料中,CrN的摩擦学性能最好。

The tribological performances of some utilized or candidate piston ring materials coated with CrN, WS2, nitrogenized and B4C against cast iron cylinder bores were researched by the SRV tester, SEM and EDX were used to observe the wear of the specimen surface, and the width and depth of the specimen surface was measured. The results of the experiments show that alcohol with low acid can lubricate the materials while the adherence wear may take place. To the materials under the research, it seems that CrN shows the best tribological performance.