铸造2026，Vol.75Issue(1)：14-21,8.DOI:10.27014/j.cnki.zhuzao.2026.0003
重型柴油机缸体用蠕墨铸铁边界磨损行为研究
Investigation of Boundary Wear Damage Behaviors of Vermicular Graphite Cast Iron Applied for Heavy-Duty Diesel Engine Cylinder Block
摘要
Abstract
Vermicular graphite cast irons(VGIs)with vermicularity values of 10％,53％,and 100％were fabricated by adding varying amounts of Fe-Si-Mg vermicularizing agents.The boundary friction and wear behavior between the piston ring assembly and the VGI cylinder block was simulated using an Rtec-MFT5000 tribometer.The results indicate that a VGI with 100％vermicularity is achieved with the addition of 0.102 wt.％vermicularizing agent,which exhibits a specific wear rate of 0.138×10-15m3·N-1·m-1.The wear resistance of the VGI is decreased by approximately 40.8％with increasing vermicularity.The worn-off graphite particles alter the wettability between the boundary layer and the VGI surface,evidencing by a decrease in the contact angle from 23.713° to 13.870°,a reduction scale of approximately 41.5％,which consequently impairing the friction-reducing function of the boundary layer.The dominant wear mechanism is identified as micro-cutting,accompanied by fatigue spalling.Furthermore,with increasing vermicularity,the depth of the ploughing grooves is increased,and the surface roughness is decreased by 3.6％.关键词
蠕墨铸铁/边界磨损/蠕化率/润湿角Key words
vermicular graphite cast iron/boundary wear/vermicularity/contact angle分类
矿业与冶金引用本文复制引用
陈波,周杰,周亮,郑宝超..重型柴油机缸体用蠕墨铸铁边界磨损行为研究[J].铸造,2026,75(1):14-21,8.基金项目
西安交通大学陆文华方直铸造基金(LWHSFT24002). （LWHSFT24002）
