钠离子交换型层状磷酸锆作为钙基脂添加剂的摩擦学性能

以层状α-Zr(HPO₄)₂·H₂O(α-ZrP)为前驱体,采用水热合成法制备Na-α-ZrP,并使用X射线衍射仪、扫描电子显微镜表征固体样品的晶体结构和形貌;制备含添加剂Na-α-ZrP的钙基润滑脂,利用流变仪和四球摩擦磨损试验机研究Na-α-ZrP对钙基脂流变性能和摩擦学性能的影响,借助3D白光干涉仪、扫描电子显微镜、X射线能谱仪、X射线光电子能谱分析钢球磨斑表面形貌、化学元素分布及化学状态。结果表明:所合成Na-α-ZrP结晶度良好、呈片状结构,能明显改善基础脂的黏弹性和黏温性等流变性能;Na-α-ZrP作为固体添加剂增强了基础脂的极压性能,在不同载荷、转速、时间下,Na-α-ZrP均体现出优异的减摩抗磨性能。磨损表面化学元素分布及化学状态分析显示,在摩擦过程中Na-α-ZrP在摩擦副上形成了一层含有Na、Zr、P、O等元素的固体保护膜。     

长城牌00#极压锂基脂的研制,性能特点及应用

长城牌００＃极压锂基脂采用含锌多效剂及摩擦改进剂调配而成。具有优良的极压性。独特的流变性能以及良好的抗剪切安定性,经在水泥厂减速机上试用,解决了漏油的难题,可以满足２２ｋＷ以下减速机的使用要求。     

长城牌OO#极压锂基脂的研制、性能特点及应用

长城牌00#极压锂基脂采用含锌多效剂及摩擦改进剂调配而成。具有优良的极压性。独特的流变性能以及良好的抗剪切安定性,经在水泥厂减速机上试用,解决了漏油的难题,可以满足22kW以下减速机的使用要求。     

固体添加剂、摩擦改进剂在锂基润滑脂中的应用研究

针对常用复合锂基润滑脂存在的润滑极压抗磨性不足等问题,研究不同固体添加剂、摩擦改进剂对复合锂基润滑脂极压抗磨减摩性能的影响。结果表明,固体添加剂对复合锂基润滑脂极压抗磨性能影响较大,其中PTFE和二硫化钼组成的复配剂可使润滑脂得到优异的极压和抗磨性能;摩擦改进剂Priolube 3986复酯和硬脂酸复配具有协同作用,可明显增强润滑脂的抗磨减摩性能;固体添加剂和摩擦改进剂对润滑脂的润滑作用可以优势互补,全面提升润滑脂综合性能。     

噻二唑衍生物作为润滑脂多功能添加剂的性能研究

利用不同长度碳链的脂肪醇合成3种多功能型极压抗磨剂——2,5-二巯基-1,3,4-噻二唑衍生物,考察其作为添加剂在复合锂基润滑脂中的摩擦学性能及抗氧化性能,利用扫描电子显微镜及X射线光电子能谱分别分析了磨痕表面形貌及表面化学成分。试验结果表明:合成的噻二唑衍生物都能有效提高基础脂的极压、抗磨、减摩及抗氧化性能;噻二唑衍生物在摩擦过程中发生了化学吸附及摩擦化学反应,在摩擦区域金属表面上形成了一层以硫化物为主,同时含有含氮小分子及铁的氧化物组成的复杂边界润滑膜,从而起到了良好的抗磨减摩的作用。     

脲基润滑脂的性能及其在连铸机上的应用

所谓脲基润滑脂是稠化剂分子中含有脲基(—ＮＨＣＯＮＨ— ) 的一类润滑脂的总称。它具有优良的性能 ,用一句体育界的行话说 ,它是润滑脂的五项“全能冠军”。1　脲基润滑脂的性能(1)优良的耐高温性能主要表现在具有较高滴点 :高温下具有相当稠度 ;抗氧化性能好等。1)高温稠度比较稠图 1表示了各种脂在宽的温度范围内的工作前锥入度随温度的变化 ,可以看出 ,脲基脂锥入度变化值最小。图 1　针入度随温度的变化2 )氧化安定性好Ｗ Ｂａｉｅｙ[1] 以动态氧化试验法 ,测定了几种脂的氧化安定性 ,数据列于表 1中。表 1　几种润滑脂的氧化安定性脂…     

复合铝-锂基润滑脂的制备及性能研究

为提高复合铝基润滑脂的综合性能,采用矿物油(KN4010)为基础油,以12-羟基硬脂酸、硬脂酸、苯甲酸、氢氧化锂、异丙醇铝为稠化剂原料,制备一系列复合铝-锂基润滑脂。通过对其滴点、锥入度、钢网分油与摩擦因数等重要参数的表征,研究基础油含量与铝锂比例对复合铝-锂基润滑脂性能的影响。结果表明:铝锂比例为3∶1时制备的复合铝-锂基润滑脂具有较高的滴点、极低的钢网分油量与较低的蒸发损失,同时摩擦因数与磨斑直径均明显低于复合铝基润滑脂。复合铝-锂基润滑脂中Al、Li元素可能在减磨过程中起到共同作用,从而使摩擦因数与磨斑直径均明显低于复合铝基润滑脂。     

聚脲基润滑脂在钢铁生产设备上的应用

介绍新型润滑脂聚脲基润滑脂的优良性能及其在武钢等企业的应用情况和取得的良好效果,极具推广前景。     

复合锂基脂的研究

本文较详细地探讨了复合锂基脂的组成、制备条件及工艺、采用二组份复合或三组份复合时对复合锂基脂性能的影响。经详细的配方筛选和试验条件研究,研制的三组份复合锂基脂具有良好的高温多效性能：高滴点,良好的胶体安定性、机械安定性、氧化安定性、防腐性、抗水性和润滑性。本文还考虑了几种添加剂对复合锂基脂性能的影响：聚异丁烯可提高复合锂基脂的粘附性：ＬａＦ３、ＭＣＡ可提高复合锂基脂的抗磨性：二烷基二硫代氨基甲酸盐     

Research on Mutual Synergy of Antiwear Additives in Lithium Complex Grease

In recent years, with the enhancement of environment awareness, there has been a progressive reduction in permitted phosphorus and sulfur levels in lubricants. Sulfur and phosphorus are the most important elements of antiwear additives. Because of the reaction between additives, less mass of additives may have the same wear reducing properties when used together. However, there is uncertainty regarding the optimum amount and ratio of these additives. In this article, the influence of five kinds of antiwear additives—sulfurized olefin cottonseed oil (T405), sulfurized isobutylene (SIB), tricresyl phosphate (TCP), molybdenum dialkyl dithiophosphates (MoDTC), zinc dialkyl dithiophosphate (ZDDP), and their combination—on lithium complex grease have been studied by single-factor and orthogonal experiments. The single-factor tests show that T405 and SIB work well under low temperature, whereas TCP and MoDTC work well under higher temperature; ZDDP are multifunctional additives. It was proved that base grease has better antiwear properties at 150 than at 75°C. Additionally, sulfurized additives T405 and ZDDP and phosphate agent TCP could react better with lithium complex grease than the additives that have the same functional group. Furthermore, the results of orthogonal experiments show that the abrasion resistance of lithium complex grease is optimally best when T405, TCP, and ZDDP are blended with a ratio of 2:2:1. In addition, a synergistic effect between T405 and TCP is observed at ratios between 1:1 and 2:1. The morphology and element composition of the worn surfaces are examined by scanning electron microscopy (SEM) and energy-dispersive spectrometry (EDS). Based on the two kinds of technology, the friction and wear mechanism of additives also have been studied.     

无铅型极压锂基润滑脂的研制

本文论述了无铅型极压锂基润滑脂应予以发展的必要性，并利用国产添加剂研制了无铅型润滑脂，全面综合地评价分析了它的理化性能。     

Effect of Cu Nanoparticles on the Tribological Performance of Attapulgite Base Grease

This study investigated the effect of Cu nanoparticles on the tribological properties of attapulgite base grease. It was found that the friction reduction ability and antiwear property of the base grease can be improved with the addition of Cu nanoparticles. Under the lubrication of grease containing Cu nanoparticles, a smoother and more compact tribofilm was formed on the rubbing surface. The tribofilm is mainly composed of Cu, FeO, Fe₂O₃, FeOOH, CuO, and SiO. In addition, the content of iron oxides and silicate oxide formed in the tribofilm was increased by the introduction of Cu nanoparticles.     

二烷基二硫代磷酸钕作为锂基脂添加剂的极压抗磨作用机理

合成了二正十六烷基二硫代磷酸阴离子与稀土离子（Ｎｄ＾３＋）的中性络合物，考察了具有类似配体结构的稀土和过渡金属（Ｚｎ）络合物对锂基脂摩擦学性能的影响，通过Ｘ光光电子能谱对添加剂的作用机理进行了研究。     

A Model for Shear Degradation of Lithium Soap Grease at Ambient Temperature

In this article, the shear degradation of lithium 12-hydroxy stearate grease will be measured using an in-house-developed Couette aging machine. In this device the shear rate is well defined. The aging is related to the generated entropy density as described in Rezasoltani and Khonsari's work (Tribology Letters, Vol. 56, No. 2, pp. 197–204, 2014). The rheological properties of the aged samples were evaluated using a parallel-plate rheometer. The results showed that there are two aging phases with different degradation rates: a progressive degradation phase at the early stage, followed by a rather slow deterioration afterwards. Based on this observation, an aging equation was formulated to describe the aging behavior of lithium-thickened grease. Atomic force microscopy results of the fresh and aged greases showed that the variation in thickener microstructure provides a good explanation for the lithium grease degradation mechanism: under shear, the original fibrous network is progressively destroyed and becomes fragmented, leading to the loss of consistency and a change in the rheological properties.     

润滑脂铁谱分析的研究与应用

本文介绍了一种新的分离润滑脂中磨粒的方法，并对利用分析式铁谱仪和旋转式铁谱仪所制得的谱片进行了比较，指出二者相结合起来的方法是最有效的分析方法，介绍了它们的操作步骤，并通过对大型滚动轴承润滑脂的铁谱分析证明了该方法的有效性。     

半流体润滑脂和稠化油的极压抗磨性研究

本文从润滑脂的胶体结构出发,讨论了皂基结构、基础油对流变学和摩擦学性能的影响,比较了半流体润滑脂和OCP高分子稠化油的极压抗磨性,发现相对于皂基而言,高分子对极压抗磨性能有不良的影响,对于半流体润滑脂的情况,皂基含量增加后,润滑脂的极压抗磨性能得到改善。     

几种添加剂在一些环境友好润滑剂基础油中的抗磨减摩探讨

本文对一些环境友好润滑剂基础油（酯型合成油和天然植物油脂）的摩擦特性及润滑化学主要性能进行试验研究，对一些油性和极压添加剂：氯化石蜡、硫化异丁稀、ZDTP、TAW（上海大学产无灰、氮磷型）的抗磨、减摩效果进行比较，并和纳米型（CF）x进行了比较。     

极压抗磨添加剂在复合锂基润滑脂中作用的研究

将3种极压抗磨添加剂(T304、T321和T404)分别加入到4种不同组分的复合锂基润滑脂中,考察其对润滑脂性能的影响。研究发现,加入不同的添加剂后润滑脂的油膜强度增加,锥入度增大,滴点降低;在添加同样剂量的情况下,T304和T321对复合锂基润滑脂的油膜强度影响较大;T321和T404对复合锂基润滑脂的锥入度影响较大;T304和T321对复合锂基润滑脂的滴点影响较大。并对其作用机制进行了分析,认为是由于极压抗磨添加剂分子中带负电性的双键和带正诱导效应及空间位阻效应的支链共同作用的结果。