外加电压对边界润滑下钢/铜摩擦副摩擦磨损的影响

利用球盘式摩擦试验机，针对150SN油润滑下的GCr15/ZCu10Fe3摩擦副，研究了不同极性的外加直流电压对其摩擦系数和磨损状态的影响，并结合磨痕的能谱分析，探讨了外加电压对其摩擦磨损性能的作用机理。     

摩擦副润滑状态可靠性的计算

本文是重新估计润滑状态的一种新的探讨——利用铁谱技术对摩擦界面间存在的磨柱进行观察分析。论证了磨粒对润滑状态的影响及其统计的尺寸分布规律。进而提出润滑状态可靠性的计算方法。     

钢蜗轮传动齿面润滑的理论与实践

本文分析研究了钢蜗轮副的齿面润滑机理,并进行了润滑剂对钢蜗轮传动性能影响的试验研究.结果表明齿面润滑是实现钢蜗轮传动的关键技术之一,且齿面润滑对钢蜗轮传动性能影响很大.为钢蜗轮传动的推广与应用提供了可靠的依据.     

基于不同摩擦副条件下的边界润滑抗磨效果研究

通过不同实验对比，从磨损角度出发分析了不同条件下零件表面的边界润滑状况，提出了选用适当的热处理工艺，恰当的摩擦副接触类型及高性能的润滑液，可明显改善边界润滑效果，提高材料的耐磨性。     

水润滑橡胶/镀镍钢配副摩擦磨损机理研究

对水润滑轴承专用橡胶／镀镍钢配副分别在干摩擦、边界润滑条件下用数显式高速环块摩擦磨损试验机进行了摩擦磨损试验，并借助SEM分析了其摩擦磨损机理。结果表明：千摩擦条件下主要为粘着磨损，边界润滑条件下主要为磨粒磨损。     

气体动压润滑轴承摩擦副材料的选择

论述了气动轴承的应用概况及其摩擦材料应具备的性质，在此基础上提出了多种适用于气动压润滑轴承的材料。     

钢蜗轮传动的润滑机理

本文通过用于钢蜗轮传动的高效极压润滑油的研制，及钢蜗轮传动的实验研究，系统地论述了钢锅轮传动处于边界润滑状态，在实现钢蜗轮传动的基础上，用边界润滑理论阐述了钢蜗轮传动的润滑机理。     

直链脂肪酸与直链脂肪醇混合对钢—钢和钢—铝摩擦副摩擦磨损性能的影响研究

本文利用四球摩擦磨损试验机和SRV摩擦磨损试验机研究了直链脂肪酸和直链脂肪醇以及其混合物对钢－钢、钢－铝摩擦副的摩擦磨损性能的影响。结果表明，对钢－钢和钢－铝摩擦副的润滑，直链脂肪酸和直链脂肪醇混合物的抗磨性能要优于单独的直链脂肪酸和直链脂肪醇的抗磨性能。     

羟基硅酸铝润滑油添加剂对钢/铸铁摩擦副磨损性能的影响

采用球盘试验和销盘试验相结合的方法,研究了钢/铸铁摩擦副在不同油润滑条件下磨损性能的变化,考察了不同含量羟基硅酸铝添加剂的作用效果,采用扫描电镜、X射线衍射仪以及纳米压痕仪对试验样品进行了分析测试。结果表明,该金属陶瓷添加剂表现出显著的抗磨性能,提高了钢/铸铁摩擦副承载能力和使用寿命;随着添加剂含量的增加,抗磨作用更加明显,负磨损现象开始出现;该添加剂可以抑制凹坑和裂纹的扩展,从而使摩擦表面形貌得到改善,并通过改变摩擦表面层的结构使摩擦副的磨损性能得到显著提高。     

润滑油添加剂摩擦性能对比试验研究

本文研究了在一定载荷条件下，两种润滑油添加剂对软齿面材质和硬齿面材质的摩擦磨损性能的影响。结果表明，复合添加剂的加入能明显降低试样的摩擦系数和体积磨损量，提高其减磨性能，显著降低摩擦面的油温，而提高润滑油的使用寿命。     

润滑油对滑动摩擦副咬死性能的影响

在ＭＨＫ－５００型环块磨损试验机上对Ｎ４６＃机械油在不同供同温度下由４５＃淬火试环、试块组成的滑动摩擦副进行了抗咬死性能试验研究。试验结果表明：供油温度对摩擦副的抗咬死性能有较大的影响，在一定的范围内提高润滑油的供油温度有利于提高摩擦副的抗咬死能力。试验还发现：随着润滑油中磨粒的增多，摩擦副咬死极限载荷逐渐下降，且摩擦副失效后表面温度表现出不确定性。润滑同中磨粒状况对摩擦副咬死影响不可忽视。对摩擦     

用齿轮油润滑实现钢蜗杆副传动的试验研究

用齿轮油作润滑剂以实现钢蜗杆副传动为目的,分别对用齿轮油润滑下的钢蜗杆副传动和用铜蜗轮油润滑下的铜蜗杆副传动的传动性能进行了试验研究。结果表明用齿轮油可以实现钢蜗杆副传动的润滑要求。为钢蜗杆副传动的推广与应用提供了可靠的依据。     

润滑油添加剂对聚合物材料摩擦磨损性能的影响研究

利用MM－200型磨损试验机考察了ZDDP对聚合物材料（PTFE、PI及MCPA）－GCr15轴承钢摩擦副摩擦磨损性能的影响。研究发现，液体石蜡及含ZDDP的液体石蜡润滑均可大幅度改善聚合物材料的摩擦磨损性能，且使其摩擦系数比干摩擦时降低一个数量级，摩擦副表面的ZDDP吸附膜均在不同程度上提高聚合物材料的耐磨性，但其对聚合物材料的摩擦性能影响不大。     

45^#钢滑动摩擦副咬死温度变化特征的试验研究

温度变化是摩擦副胶合前期重要特征之一。在ＭＨＫ－５００型块式磨损试验上，采用热电偶测温技术，对４５＾＃淬火钢和钢试环、试声滑动摩擦副咬死过程的温度变化特征进行了试验研究。试验结果表明：胶合瞬间，摩擦副表面温度发生了突变，胶合发生后，摩擦副是否发生咬死受材料高温下机械特性以及润滑方式等因素的影响。磨擦副表面微凸峰之间以及润滑油中磨屑与摩擦副表面间的微切削作用是导致磨擦副表面温度突变的原因之一。     

Stick-Slip Motion in Boundary Lubrication

Using dynamical analysis for a pin-on-disk sliding system and the consideration of meniscus formation at the sliding interface, a wide range of experimental observations on stick-slip motion can be explained. It is shown that when the initial growth rate of the static friction force is larger than about half the product of the substrate speed and the spring constant, slick-slip motion occurs in that sliding system. The critical substrate speed or the critical spring constant, above which stick-slip motion ceases, can thus be determined. It is also shown that the saturation substrate speed, below which stick-slip motion retains its maximum stick-slip amplitude, is inversely proportional to the total growth time of the static friction force. The maximum stick-slip amplitude is proportional to the final difference between the static and kinetic friction force. For a thicker surface liquid-film, the initial growth rate and the final static friction force are larger but the total growth time is shorter, resulting in a larger critical speed, a larger stick-slip amplitude, and a larger saturation speed. For rougher contact surfaces, the initial growth rate is larger but the final static friction force and the total growth lime are smaller, resulting in a larger critical speed, a smaller stick-slip amplitude, and a larger saturation speed.     

润滑油中磨屑尺寸对滑动摩擦副咬死性能影响的试验研究

在ＭＨＫ－５００型环块式磨损试验机上,对含不同尺寸磨屑润滑油润滑的４５＾＃淬火屑试环,试块组成的滑动摩擦副进行了抗咬死性能试验研究,试验结果表明,润滑油中磨屑尺寸对滑劝摩擦副抗咬伤性能有很大的影响,改善润滑油清洁度的显著提高摩擦副的抗咬死承载能力,滑动摩擦副的抗咬死能力随润滑油中磨屑含量的增中减小很快,观察咬死后试件上的磨痕,表明滑动摩擦副的咬死是由于局部高温引起的接触区熔焊所致。     

Silicon Nitride Boundary Lubrication: Lubrication Mechanism of Alcohols

This paper describes the lubrication mechanism of alcohols with silicon nitride under boundary lubrication conditions. Dynamic wear tests and static chemical reaction studies were conducted to study the chemical interaction between alcohols and silicon nitride. Direct evidence of chemical reactions occurring between alcohols and silicon nitride was collected. Gel-permeation-chromatography-graphite-furnace-atomic-absorption (GPC-GFAA) analysis detected the presence of high molecular weight (HMW), silicon-containing, metallo-organic compounds in the wearing contact. Secondary ion mass spectrometry (SIMS) analysis of the reaction products from wear tests revealed the formation of silicon alkoxides. These alkoxides subsequently reacted to form HMW products which had been independently verified as capable of lubricating silicon nitride surfaces. A two-ball collision test was used to verify the lubricating quality of the film generated from the wear test. A lubrication mechanism is proposed in which alcohols adsorb and react with the oxide/hydroxide layer of Si₃N₄ to produce a bonded surface silicon alkoxide. Subsequent tribochemical reactions prompted by the surface disruption from the wearing contact cause the formation of free silicon alkoxides. These species then proceed to form a variety of silicon-containing high molecular weight products that have demonstrable lubricating ability. This mechanistic understanding provides a framework of Si₃N₄ lubrication.     

Silicon Nitride Boundary Lubrication: Effect of Oxygenates

A ball-on-three-flat (BTF) wear tester was used to investigate the boundary lubricating characteristics of oxygenates on a commercial silicon nitride. A wide variety of oxygen-containing compounds were tested neat and/or at 1% by weight in a paraffin oil. Compounds containing hydroxyl functional groups were more effective compared to a base case of neat paraffin oil. Decreases of up to 58% in friction coefficient, and 95% in wear were obtained. In most cases, films were observed in and around the wear scar, suggesting chemical reactions had taken place in the contact.

Additional wear tests, conducted using neat shorter-chain linear primary alcohols, i.e., 6–10 carbons, demonstrated boundary lubrication protection, with longer chain length providing better antiwear performance. A study of several C₈ compounds with specific oxygen-containing functional groups (primary alcohol, secondary alcohols, acid, aldehyde, and ketone) demonstrated that the primary alcohol had the strongest boundary lubricating effect. Varying the amount of water in the alcohols had little effect on friction and wear, suggesting that the boundary lubrication effects observed were not merely due to dissolved water in these fluids, but some characteristic chemical interaction with the hydroxyl functional group of the alcohols and acids.