The reciprocating sliding friction and wear test of vermicular graphite cast iron with varying vermicularity was conducted by using the Rtec-MFT5000 Multi Function Tribometer to reveal the effect of vermicularity on the wear surface damage behavior and wear properties of vermicular graphite cast iron.The results show that the anti-wear performance of vermicular graphite cast iron declines with the increase of vermicularity under the same conditions.The specimen with 61%of vermicularity has a wear volume of 0.049 mm3 under the high load of 30 N,and the wear vesitance is 16.9%and 22.2%higher than that of the specimens with 83%and 96%of vermicularity,respectively.The friction coefficient of vermicular graphite cast iron decreases with the vermicularity increasing under the same load.The average friction coefficient of vermicular graphite cast iron falls as the load increases.The predominant wear mechanism of vermicular graphite cast iron at 2 N is micro-cutting,whereas at 15 N,the predominant wear mechanisms are micro-cutting and adhesive wear.When the load increases to 30 N,the wear mechanisms of vermicular graphite cast iron are micro-cutting,adhesive wear and fatigue wear.
关键词
蠕化率/蠕墨铸铁/摩擦磨损/减摩抗磨
Key words
vermicularity/vermicular graphite cast iron/friction wear/anti-friction and anti-wear
维普
万方数据