粘结固体润滑膜的研究及其应用

粘结固体润滑膜(简称干模)因具有良好的润滑性、高的承载能力、耐腐蚀、耐高温、抗辐照、使用方便等优点,得到了广泛的应用,尤其在空间技术、军工等方面用于解决特殊工况下运动部件的润滑。我国自六十年代开始对粘结固体润滑膜进行了大量的研究,八十年代初处于研究的高峰期,先后研制许多干膜并投入生产,形成了系列产品。我国干膜的主要研制单位中国科学院兰州化学物理研究所,研制出了硅酸盐系列、聚酰亚胺系列以及环氧树脂、聚苯硫醚、磷     

粘结固体润滑膜的摩擦学特性研究

采用2种不同的固体润滑粉末(石墨和二硫化钼)分别与溶剂、粘结树脂组合制得粘结固体润滑剂,涂敷于钢板表面成膜,然后对得到的粘结固体润滑膜的润滑性能、物理化学性能和耐磨性能进行了测试。结果表明:粘结固体润滑剂中的固体粉末含量越多、颗粒越细,润滑膜的润滑性能越好,但固体粉末含量的增加影响了润滑膜的干燥时间,附着力、柔韧性和耐冲击性能也变差;只有当润滑剂中加入了适量固体粉末后,得到的润滑膜的减磨效果最佳。     

第二讲 固体润滑膜的性能

第二讲固体润滑膜的性能常州牵引电机厂石淼森关键词固体润滑膜，摩擦，磨损，温度，性能，润滑固体润滑膜（以下简称膜）是指固体润滑涂（镀）层最表面的那层薄膜以及在对偶材料表面上形成的转移膜。固体润滑成功与否，取决于膜的形成能力。如果膜的生成与磨耗平衡，表明...     

二硫化钼固体润滑球轴承的真空摆动特性

以常用精密二硫化钼固体润滑球轴承为研究对象,采用摆动试验装置,在真空环境中研究其在小角度往复运动工作模式下的摩擦力矩、磨损形貌、使用寿命。结果表明:在真空环境中小角度往复运动模式下,二硫化钼固体润滑轴承摩擦表面不能够形成有效的转移润滑膜,因而轴承摩擦力矩增大,滚道磨损严重,且在一定范围内摆动角度越小、摆动频率越高,轴承的摩擦力矩增加越大、滚道磨损越严重;工作在小角度往复摆动模式下二硫化钼固体润滑球轴承的运转寿命远小于同等接触应力条件下单向运转时的轴承运转寿命。     

MoS2固体润滑剂在轴承润滑中的应用

介绍ＭｏＳ２ 润滑剂的润滑机理及特性,分析ＭｏＳ２ 润滑剂在跑合运转时的润滑效果,通过试验和实例叙述了ＭｏＳ２ 润滑剂在轴承润滑中的应用效果。附图１ 幅,表３个,参考文献３ 篇。     

表面织构对二硫化钼喷涂膜摩擦学性能的影响研究

在试件表面激光加工表面织构,采用喷涂法制备二硫化钼固体润滑膜,在环块摩擦磨损试验机上研究沟槽型表面织构对二硫化钼固体润滑膜的摩擦学性能的影响。结果表明,在一定的工况条件下,就固体润滑膜的寿命而言,微沟槽的几何参数存在最优值。分析发现,织构可以储存固体润滑剂,在一定的工况条件下,会使得织构内的固体润滑剂被挤出,不断地补充摩擦接触面间的固体润滑剂,使得固体润滑膜的寿命延长。     

二硫化钼润滑块在球磨机上的应用

中小型球磨机滑动轴承与空心轴之间的润滑常采用油杯滴油润滑和毛线润滑，若油漏或供油不及时，易造成轴瓦烧毁。通过分析，现采用二硫化钼固体润滑剂代替滴油润滑。使用证明，具有可靠性高，消耗油少的特点，使用效果良好。     

第三讲 固体润滑膜的制备

第三讲　固体润滑膜的制备常州牵引电机厂石淼森关键词固体润滑膜，制备，粉末喷涂，复合镀层将固体润滑剂粘结在摩擦表面上的方法较多。例如将固体粉末直接飞溅（在齿轮箱内），以及采用各种物理或化学方法粘着等。在固体润滑技术领域内，通常采用下列几种方法：即所谓干...     

固体润滑轴承在航天器中的应用

为满足某气象卫星用扫描辐射计轴承的要求 ,研制开发出一种固体润滑轴承。采用沟道工作表面溅射MoS2 ,钢球离子镀TiN及自润滑保持架技术 ,进行轴承优化设计。该轴承成功地通过了主机高真空全态模拟试验 ,并已随卫星在轨道运转。附图 2幅 ,表 1个     

Oxidation Characteristics of MoS2 and Other Solid Lubricants

Thermogravimetric oxidation data are presented for fifteen refractory metal dichalcogenides. Interpretation of these data is supported by oxidation thermograms of the chalcogens and the refractory metals and by X-ray diffraction analysis of the oxidized products. The effects of humidity, heating rate, and particle size on oxidation of the dichalcogenides are presented. Thermogravimetric analysis is shown to be helpful in detecting impurities, such as unreacted elements, in commercial samples. Some dichalcogenides are shown to retain the same relative oxidation stability, when bonded in thin films with a ceramic, as for pure powder samples. A table is presented summarizing these oxidation characteristics together with information from the literature on crystal structures, electrical resistivities, and densities.     

The Structural and Tribological Properties of MoS2-Ti Composite Solid Lubricants

MoS ₂ -Ti composite solid lubricant films were deposited on an AISI D2 tool steel and silicon wafer by CFUBMS (closed field unbalanced magnetron sputtering). The deposition process was performed for nine different test conditions at various levels of target current, working pressure, and substrate voltage using the Taguchi L ₉ (3 ⁴ ) experimental method. It was observed that the chemical composition of MoS ₂ -Ti composite films was significantly affected by sputtering parameters. It was determined that the microstructure of composite films is neither crystalline nor amorphous; in other words, it is quasi-amorphous, and (002) and (100) planes characteristic of MoS ₂ occurred. The friction coefficients of the films were determined over 1800 s and at a loading of 10 N by means of a pin-on-disk tribotester. The changes in friction coefficient were related to structural changes based on Ti addition and the different levels of deposition parameters.     

The Effect of Film Thickness on Friction Coefficients for Solid Lubricants; CaF2, MoS2 and Graphite

An experimental investigation has been conducted to determine the effect of film thickness on the friction coefficient of solid powdered lubricants, applied as thin films on the mild steel specimens.

Curves representing the coefficient of friction for various film thicknesses, as well as the tabulated data are given. The results are discussed and compared to those theoretically conceivable using the relationship of Bowden and Tabor and that of Rabinowicz.

Solid films of graphite, molybdenum disulphide and calcium fluoride with a thickness range of 0.0002 to 0.0008 in. were used. It has been concluded that, for the solid lubricants tested, the coefficient of friction is dependent upon the film thickness. The Theory of Adhesion by Bowden and Tabor and the mathematical relationship by Rabinowicz do not adequately explain the variation in the coefficient of friction as the film thickness varies.     

镶嵌MoS2的Al2O3/TiC基陶瓷刀具材料微孔表面摩擦磨损性能研究

采用Nd:YAG激光器在Al2O3/TiC陶瓷刀具材料表面加工出不同密度的微孔,并涂覆填装MoS2固体润滑剂,在UMT-2摩擦磨损试验机上进行往复摩擦试验,研究其在不同载荷和速度下的摩擦磨损性能,通过白光干涉仪、光学显微镜和扫描电镜观察激光织构化后表面特征和磨损后表面形貌。结果表明:激光织构化后,陶瓷材料表面发生了氧化;在相同的实验条件下,与光滑表面相比较,填装MoS2固体润滑剂的微孔表面能够有效地降低摩擦因数,减小磨损率。这主要是由于填装在微孔中的润滑剂在摩擦作用下涂覆到基体表面,形成润滑膜,起到减摩降磨作用,同时激光加工后微孔周围凸起及氧化后形成的摩擦特性优良的TiO2也能起到良好的减摩降磨效果。通过对磨损形貌分析,光滑表面磨损较为严重,有大量的犁沟产生,主要的磨损形式为磨粒磨损及脆性断裂;微孔表面磨损较为轻微,其主要磨损发生在微孔周围。     

固体润滑剂MoS2溅射技术

本文讨论目前应用广泛的溅射工艺,特别是应用于沉积MoS2、WS和PTFE固体润滑的溅射技术.溅射MoS2膜试验结果表明,固体润滑特性直接受选择的溅射参数(功率、密度、压力、溅射蚀刻、直流偏压等)和底材温度、表面化学性质、外形以及摩擦试验时环境条件的影响.电子显微镜和其他表面灵敏的分析手段表明,溅射MoS2膜的形态和化学性质的组合变化直接影响膜的结合强度和摩擦性质,薄的溅射润滑膜只有在选择了合适的溅射参数和被镀工件的材料时,才能可靠使用.附图1幅,参考文献2篇.     

固体润滑剂在轴承上的应用研究

以水轮发电机轴承为应用研究实例，介绍了轴承镶嵌固体润滑剂的摩擦磨损机理，镶嵌轴承套的结构，固体润滑剂材料；并用摩擦学性能试验及台架模拟试验验证；在水轮发电机轴承上使用固体润滑剂可以提高润滑性能、降低摩擦系数，使摩擦副间能不断形成自补偿固体润滑转移膜，说明在重载，低速，摆动，间歇运动和泥水环境苛刻条件下工作的水轮发电机轴承使用固体润滑剂，比液体润滑具有更优越的性能。     

Assessing the Effectiveness of Solid Lubricants

The effectiveness of a proposed solid lubricant is investigated, on the basis of the abrasive cutting coefficients. Its dependence on the grinding conditions, the characteristics of the boron-nitride wheel, and the alloying of high-speed steel is determined. The lubricant reduces the abrasive cutting coefficient by about 40–50%. A method is proposed for measuring the frictional coefficient. The benefits of lubricant application are assessed. The utility of the abrasive cutting coefficient in estimating the effectiveness of solid lubricant is confirmed.     

MoS_2基固体润滑剂微织构自润滑刀具切削性能的研究

采用激光加工方法在硬质合金刀具的前刀面加工不同形状的微织构,并填充不同的固体润滑剂,对制备的微织构自润滑刀具以及传统刀具进行干切削304奥氏体不锈钢的对比试验。试验结果表明,与传统硬质合金刀具相比,微织构自润滑刀具能显著地降低切削力,减小前刀面摩擦系数,降低切削温度,减少刀具前刀面的磨损。选用MoS_2/Sb_2O_3复合固体润滑剂能更好地提高微织构刀具的切削性能,减少切屑的粘结。     

Lubrication by Transferred Films of Solid Lubricants

Experiments are described to determine the lubricating ability of various solid films, particularly graphite and molybdenum disulfide, transferred from a compact to a steel surface. The amount of lubricant transferred depends markedly on the surface finish of the steel, and the most effective films are formed on relatively rough surfaces. In these conditions, bonding between the film and its substrate appears to be primarily mechanical. Determinations of the scuffing load and endurance tests show that replenishment of the lubricant film by continuous transfer to compensate for wear is only possible to a limited extent. With molybdenum disulfide, the film ultimately wears away, but with graphite, failure occurs when the mean surface temperature exceeds about 100 C. The load-carrying capacity of transferred films of molybdenum disulfide is appreciably greater than that of graphite films.     

Application of Solid Lubricants in Grinding: Investigations on Graphite Sandwiched Grinding Wheels

The intense heat generated in grinding process, if not controlled, will lead to major quality defects. Conventional liquid coolants, employed in flood form, have many limitations from technical, environmental and economic angles. Minimization or possible elimination of cutting fluids by substituting their functions by some other means is emerging as a thrust area of research in grinding. The authors have reported the feasibility of application of solid lubricants in grinding. This paper deals with the detailed investigations on solid lubricant integrated grinding wheels, by providing peripheral graphite sandwiching. Improvement in process results has been observed with this concept.