首页 | 本学科首页   官方微博 | 高级检索  
     检索      

羟基硅酸镁复合粉体润滑油添加剂对钢-钢摩擦副的抗磨自修复机理
引用本文:朱公志,高玉周,刘世永,张会臣.羟基硅酸镁复合粉体润滑油添加剂对钢-钢摩擦副的抗磨自修复机理[J].摩擦学学报,2012,32(2):183-188.
作者姓名:朱公志  高玉周  刘世永  张会臣
作者单位:大连海事大学交通运输装备与海洋工程,辽宁大连,116026
基金项目:辽宁省科技厅资助项目( 2009222010).
摘    要:以羟基硅酸镁复合矿物粉体作为润滑油添加剂,采用MM-200型环-块摩擦磨损试验机研究了45#钢摩擦副的减摩抗磨性能;采用扫描电子显微镜观察了钢环磨损表面和润滑油所含添加剂颗粒的形貌,采用能谱仪分析了钢环磨损表面成份,采用表面形貌仪测定了钢环磨损表面粗糙度,进而探讨了复合矿物粉体添加剂的抗磨自修复机理.结果表明:羟基硅酸镁复合矿物粉体添加剂对钢-钢摩擦副具有良好的减摩抗磨作用.在基础油(46#机油)润滑条件下,随着载荷的增加,磨损机制由轻微擦伤转变为严重擦伤和黏着磨损.在含添加剂的油润滑条件下,较低载荷下钢环磨损表面发生轻微擦伤,且擦伤程度比基础油润滑下的更轻;而在较高载荷条件下钢环磨损表面非常光滑,呈现轻微的黏着磨损迹象.其原因在于在较低载荷条件下,添加剂在摩擦过程中可发生团聚形成大小不一的球状团聚体,球状团聚体可起到微球轴承的作用,使钢-钢摩擦副由滑动接触状态转变为滚动接触状态,从而显著降低摩擦系数,提高抗磨性能.而在较高载荷下,羟基硅酸镁复合矿物粉体添加剂易在钢-钢摩擦副磨损表面形成自修复抗磨层,从而隔离金属表面的直接接触,起到良好的减摩抗磨作用.

关 键 词:羟基硅酸镁复合矿物粉体  添加剂  钢-钢摩擦副  抗磨自修复机理

Antiwear and Self-repairing Mechanisms of Magnesium Hydroxysilicate Composite Powder as a Lubricating Oil Additive for Steel-Steel Pair
ZHU Gong-zhi,GAO Yu-zhou,LIU Shi-yong and ZHANG Hui-chen.Antiwear and Self-repairing Mechanisms of Magnesium Hydroxysilicate Composite Powder as a Lubricating Oil Additive for Steel-Steel Pair[J].Tribology,2012,32(2):183-188.
Authors:ZHU Gong-zhi  GAO Yu-zhou  LIU Shi-yong and ZHANG Hui-chen
Institution:Transportation Equipments and Ocean Engineering College, Dalian Maritime University, Dalian 116026, China;Transportation Equipments and Ocean Engineering College, Dalian Maritime University, Dalian 116026, China;Transportation Equipments and Ocean Engineering College, Dalian Maritime University, Dalian 116026, China;Transportation Equipments and Ocean Engineering College, Dalian Maritime University, Dalian 116026, China
Abstract:An MM-200 ring-on-block friction and wear tester is performed to evaluate the friction-reducing and antiwear behavior of magnesium hydroxsilicate composite mineral powder as a lubricating oil additive for steel-steel (AISI-1045) pair. The morphology of worn steel ring surfaces and of mineral powder additive in the lubricating oil is analyzed using a scanning electron microscope. The elemental composition of worn steel ring surfaces is analyzed using an energy dispersive spectrometer, while the roughness of worn steel ring surfaces is measured using a surface profiler. The antiwear and self-repairing mechanisms of the composite mineral powder additive is explored based on results of surface analysis.It is found that magnesium hydroxsilicate composite mineral powder as a lubricating oil additive shows good friction-reducing and antiwear behavior for steel-steel pair. Under the lubrication of base stock, wear mechanisms of the steel-steel pair are transformed from mild scuffing to severe scuffing and adhesion wear with increasing load. Whereas, only mild scuffing is seen on worn steel ring. The surface at a low load (300 N) under the lubrication of base stock containing the mineral powder additive has slighter degree of scuffing than that under the lubrication of the base stock alone. Besides, worn steel ring surfaces are quite smooth at a high load (600 or 900 N) under the lubrication of base stock containing mineral powder additive, showing slight signs of adhesion wear. The reasons lie in that, on one hand, the mineral powder additive is able to agglomerate at a low load forming spherical aggregates with various sizes and transform sliding contact of the steel-steel pair to rolling contact by way of "micro-ball bearing effect", thereby leading to significantly reduced friction coefficient and greatly increased antiwear ability. On the other hand, the composite mineral powder additive is easy to form a self-repairing antiwear layer on worn steel surfaces at a high load to prevent direct metal-to-metal contact, thereby considerably reducing friction and wear.
Keywords:magnesium hydroxsilicate composite mineral powder  additive  steel-steel frictional pair  antiwear self-repairing mechanism
本文献已被 CNKI 万方数据 等数据库收录!
点击此处可从《摩擦学学报》浏览原始摘要信息
点击此处可从《摩擦学学报》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号