含纳米Al_2O_3/Fe_3O_4的FeS固体润滑复合层的摩擦学性能

采用离子氮碳共渗与离子渗硫复合处理技术在45钢表面制备FeS固体润滑复合层,复合层中硫化物表层厚度约为10μm,其硫化物颗粒与孔隙均在微纳米量级且分布均匀。复合层相组成主要为FeS、FeS2和Fe3N。在含0.1%n-Al2O3＋0.08%n-Fe3O4液体石蜡润滑下,复合层与纳米Al2O3/Fe3O4复合添加剂产生协同作用,磨损表面形成了由硫化物、硫酸盐、氮化物等组成的化学反应膜,使FeS固体润滑复合层表面摩擦因数最低,始终保持在0.07左右,体积磨损量最小,比未渗表面降低了92%,比渗硫表面和氮碳共渗表面分别降低了85%和44%。     

中高含水油井防偏磨水基润滑液的研制与应用

为更好地延长中高含水期偏磨油井检泵周期,借鉴机械切削、磨削、拉拨、轧制和液压传动等领域广泛应用的水基润滑理论,以聚氧乙烯丙三醇硼酸酯硬脂酸酯、脂肪酸咪唑啉硼酸酯、两性表面活性剂SS-Z、聚氧乙烯烷基苯酚醚磺酸钠盐等为主剂,添加氟碳表面活性剂和维生素C合成了FYR-4水基润滑液。该润滑液体系中高反应活性的磷和氮、脂肪酸分子所形成的吸附膜和摩擦化学反应膜,具有优良的抗磨减摩性能和生物降解性。30余口油井的现场应用表明,油井日常维护中添加0.25%~0.50%的水基润滑液FYR-4后,检泵周期平均延长275 d,应用效果良好,为中高含水期油井偏磨治理提供了新途径。      

油溶性有机钨润滑机理的研究

研究了一种油溶性有机钨--烷基芳胺基二硫代磷酸硫化氧钨(WADTP)的制备、分子结构特征及摩擦学性能.研究结果表明,WADTP添加剂具有烷基、芳基和胺基相结合的独特分子结构,并含有S、P等活性元素,能够有效地改善金属接触面之间的摩擦环境,增强润滑油的抗磨减摩性能.     

W18Cr4VCo5钢表面PCVD复合陶瓷涂层的摩擦学研究

用等离子体化学气相沉积(PCVD)技术对挤压模具钢表面进行复合陶瓷强化处理，用环一块摩擦磨损试验模拟金属挤压的磨损过程，研究了复合陶瓷表面强化涂层的摩擦磨损特性。用俄歇电子能谱(AES)、X射线衍射(XRD)和扫描电镜(SEM)分析了表面涂层的元素分布、相结构和磨痕形貌。结果表明，W18Cr4VCo5钢表面PCVD陶瓷涂层具有显著减摩抗磨能力。     

摩擦学涂层技术在模具减摩抗磨中的应用

针对模具恶劣的工况条件，介绍了涂层材料体系及匹配原则，综述了应用于模具行业中的摩擦学涂层技术，展望了摩擦学涂层的最新进展。     

Alkylated fullerene as lubricant additive in paraffin oil for steel/steel contacts

An alkylated fullerene which bears three eicosyl chains (3,4,5-C₂₀C₆₀, 1) was synthesized via [3 + 2] cycloaddition. At 25°C where the aliphatic chains are in the crystalline state, 1 exhibits a moderately improved solubility in paraffin oil compared to pristine C₆₀. At 80°C which is well-above the chain melting temperature (T_c), a significant solubility increase was observed. Upon cooling to 25°C, suspension containing plate-like aggregates composed of lamellar subunits form, which can be stable for several days. Applications of 1 as a lubricant additive in paraffin oil (PO) for steel/steel contacts both below and above T_c have been investigated in detail. It was found that the addition of 1.0 wt% 1 to PO can reduce the friction coefficient by ～24% at 25°C. Moderate reduction of the friction coefficient at 90°C was also observed. Analysis on the worn surfaces revealed a pronounced antiwear property of 1 by reducing the areas of the worn surfaces and smoothing the scuffing. Our results show that alkylated fullerenes can be potentially used as a new generation of lubricant additives. Finally, the lubrication mechanisms of 1 at different temperatures were discussed.     

Synthesis,Structure and Tribological Properties of Stearic Acid Coated (NH4)3PMo12O40 Nanoparticles

A new kind of oil additive, stearic-acid-coated (NH₄)₃PMo₁₂O₄₀ nanoparticles was synthesized by a chemical method. The morphology and structure was characterized by means of transmission electron microscopy; X-ray powder diffraction and Fourier transform infrared spectroscopy. The tribological properties of coated (NH₄)₃PMo₁₂O₄₀ nanoparticles as oil additives in liquid paraffin were evaluated in a four-ball machine. The results showed that the coated (NH₄)₃PMo₁₂O₄₀ nanoparticles have an average diameter of about 20 nm, and the (NH₄)₃PMo₁₂O₄₀ nanocore has a Keggin structure. As oil additives they dramatically improved the antiwear ability of liquid paraffin, and enhanced the friction-reduction and load-carrying ability of liquid paraffin to some extent. The rubbed surface was investigated by scanning electron microscopy and X-ray photoelectron spectrometry. It was found that the boundary film on the worn surface was composed of MoO₃, (NH₄)₂MoO₇ and Fe₂O₃. Which contributed to the good tribological properties of the oil.     

金属基复合材料涂层摩擦学的研究进展

对金属基复合材料涂层的减摩抗磨性能和制动摩擦性能、涂层的摩擦磨损机理和影响涂层摩擦磨损性能若干因素的研究现状进行了综述，并指出有关涂层材料与基体的匹配规律、不同基材上涂层制备工艺的优化、多组元涂层及多层涂层的设计和制备工艺、纳米尺度涂层技术、涂层内应力的控制、涂层减摩抗摩机理以及制动摩擦机理等方面是今后在金属基复合材料涂层摩擦学方面值得进一步研究的问题。     

凹凸棒石/油溶性纳米铜复合润滑添加剂的摩擦学性能

采用SRV-Ⅳ型摩擦磨损试验机研究凹凸棒石/油溶性纳米铜复合润滑添加剂的摩擦学性能,利用SEM和XPS对磨损表面进行表征分析。结果表明:两种单一添加剂均能明显改善基础油对钢-钢摩擦副的摩擦学性能,而复合添加剂较单一添加剂具有更加优越的减摩抗磨性;载荷越高,复合添加剂的摩擦学性能越好。在复合添加剂的作用下,磨损表面形成了致密光滑的复合摩擦保护膜,该保护膜的主要成分为FeS_2,Fe_2O_3,SiO_2,Cu,FeOOH和有机物。     

有机金属化合物在极压抗磨剂中的研究与应用

有机金属化合物是一种高性能的极压抗磨剂,不仅具有优良的抗磨减摩性能,而且拥有较好的抗氧化和耐高温性能,能显著提高润滑剂的承载能力,在润滑油添加剂中得到广泛应用,具有良好的发展前景。本文介绍了有机钼、有机钨和有机钛极压抗磨剂的性能和应用。