摘要
在销—盘试验机上考察了水、油和一种常用切削液GMY对Si3N4／钢摩擦副摩擦磨损性能的影响．试验选用的速度和载荷范围分别是0．8—3．2m／s和58．8～235．2N润滑剂对摩擦和磨损的影响与润滑剂种类有很大关系．水润滑膜的强度弱，边界润滑效果差，所以在水润滑条件下，仍不能防止钢转移到Si3N4摩擦面上．油膜的强度较高，但由于验用的油不含添加剂等极性化合物，其边界润滑性也随载荷增大而逐渐变坏．GMY溶液中含有多种极性化合物，这些物质能在摩擦面上形成强度较高的边界膜，并在滑动过程中与表面作用形成摩擦化学反应膜，能起到很好的边界润滑作用，是一种良好的切削润滑剂．试验还发现，随着GMY溶液浓度的增大，其边界润滑性能可进一步得到改善．
The friction and wear properties of Si3N4/steel rubbing pairs were investigated by using a Pin-on-disk tribometer. Water, liquid paraffin and a commercial cutting fluid were uSed resistively as lubricants. The selected speed and load ranges for the tests were 0.8 to 3.2m / s and 58.8 to 235.2N. The effects of lubricants on the friction and wear of Si3N4/steel pairs showed great difference. The boundary lubricity of water in the t6sts was very POor, which could not well prevent the steel from transfering onto the Si3N4 surface in rubbing process. Liquid paraffin could form stronger lubicating film compared with water, but its boundary lubricity was not good enough for the lubrication of Si3N4/steel pair under relatively high load condition. The friction and wear increased gradually with the load when liquid paraffin was used for lubrication. The commerical cutting fluid GMY, in which some fat acid salt and surfactants were contained,showed excellent boundary lubricating characteristics. The POlar molecules of the compounds in the fluid could be adsorbed strongly on the rubbing surfaces by physical or chemical adsorption. In addition, some of the adsorbed molecules might react with the sliding surfaces to form tribolchemical reaction film. Both of the two films could decrease the friction and wear of the Si3N4/steel rubbing pairs under boundary lubrication conditions. It was also found that the boundary lubircity of the GMY fluid could be improved further when its concentration was increased.
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
1997年第1期57-62,共6页
Chinese Journal of Materials Research
关键词
陶瓷
钢
切削液
润滑
粘着磨损
刀具
ceramic steel cutting fluid lubrication adhesive wear
