摘要
为了研究陶瓷颗粒含量对Cr-Al_2O_3复合镀活塞环摩擦磨损性能的影响,采用镀铬活塞环和4种Al_2O_3陶瓷颗粒含量不同的Cr-Al_2O_3活塞环与CuNiCr合金铸铁缸套组成配对副,对其进行摩擦磨损试验,对比各配对副摩擦因数及磨损量。结果表明,镀铬活塞环-缸套配对副摩擦因数较大,约为其它4种含Al_2O_3陶瓷颗粒的Cr-Al_2O_3活塞环-缸套配对副的1.2倍,磨损也比其它4种配对副严重,摩擦副的表面均已经发生严重的粘着磨损现象;其它4种含陶瓷颗粒的Cr-Al_2O_3活塞环-缸套配对副的摩擦因数相近,缸套的磨损量也相近,活塞环的磨损量随着陶瓷含量的增加而先减小后增加。陶瓷颗粒的镶嵌提高了活塞环的耐磨性能,陶瓷含量过少,活塞环表面承载能力不足;陶瓷颗粒含量过多,陶瓷颗粒易脱落,这些都会增大活塞环的磨损量。
The paper reports the effects of various content of ceramic particles on the friction and wear properties of CrAl_2O_3 piston ring.In this study,chrome plated piston ring and four types of Cr-Al_2O_3 piston rings with different contents of ceramic particles were used to match the CuNiCr alloy cylinder liner.Detailed information was acquired using the grinding tests to compare the friction coefficient and the wear quantity of each pair of matching.The results show that the friction coefficient of the non-ceramic matching pair is predominant,presenting 1.2folds higher than other four CrAl_2O_3 piston ring containing ceramic particles associated with cylinder.Moreover,the wear of the surface of the non-ceramic matching pair is more serious than the others,presenting aphenomenon of severe adhesive wear.The friction coefficient and the cylinder＇s wear of the other four pairs are comparable.The wear quantity of the Cr-Al_2O_3 piston ring shows a growth stage before it decreases with the increase of ceramic particles content.The piston ring set with ceramic particles shows improved wear resistance.The surface of the bearing capacity of the piston ring is insufficient as ceramic content is too small.When the content of ceramic particles is too much,the ceramic particles are easy to fall off.These two conditions will increase the wear of the piston ring.
出处
《中国表面工程》
EI
CAS
CSCD
北大核心
2016年第1期80-86,共7页
China Surface Engineering
