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1.
分别采用水溶性酚醛树脂法、浸浆缠绕法和贴胶缠绕法3种工艺制备了汽车用离合器面片,研究了3种工艺对离合器面片的摩擦磨损性能、物理性能和力学性能的影响。结果表明：采用水溶性酚醛树脂工艺制备的离合器面片耐热性好,摩擦系数大小适中、热稳定性好,磨损率低,硬度、孔隙率适中,而且剪切强度和断裂应变最大,综合性能最为优异。 相似文献
2.
Oil-soluble stannous naphthenate (SN) is synthesized by using naphthenatic acid and SnO. And its molecular structure is confirmed by IR and multielement oil analyzer (MOA). The tribological performances of the organotin as lubricant additive are evaluated with a four-ball friction and wear tester. These experiments indicate that the wear scar diameter (WSD) and friction coefficient are diminished while the load-carrying capability increased by comparison with that of base oil. The elemental composition of the boundary lubricating film is examined by means of Auger electron spectroscopy (AES). Synergistic effect is found in the load-carrying capability of the complex of SN and sulfured olefin. The analytical results of AES indicate that the good performance of stannous naphthenate is attributed to the formation of a boundary lubricating film containing Sn on the rubbed surface. 相似文献
3.
由植物油提取的合成润滑剂的流变特性和摩擦特性 总被引：3，自引：0，他引：3
The double bonds in the vegetable oils can be conjungated and Diels-Alder react when they are heated in the existence of the catalyst. The percent of the double bond will decrease and the oxidative stability of the vegetable oils can be ameliorated. Dimmer acid can react with different carbon chain length of alcohols to form dimmer acid esters. A series of dimmer acid esters were synthesized and their rheological characteristics （viscosity, viscosity index, pour point） and tribological characteristics （the coefficient of friction at different load, the characteristic of extreine pressure （ PB ）, the wear scare diameter （ D30min^196N ） were evaluated and analyzed. The results showed that the characteristics of Di-iso-octanol dimmer acid ester were the best among the synthesized dimmer esters. It＇ s a lubricant with good properties（the viscosity is 94.5 mm^2/s, the viscosity index is high up to 141 and the pour point is - 49℃ ）. It is a kind of newly interesthing ester type lubricant. Its rheological and tribological characteristics are even better than those of the slap-up synthesized lubricant--pentaerythritol esters （C7-9 acidate）. The FT-IR spectrophotometer was used to analyze the structure of the synthetic esters. Their IR spectra are the same as the typical IR spectrum of ester. The test indicated that Di-iso-octanol dimmer acid ester could be used as a kind of base lubricant with excellent quantity. 相似文献
4.
We presented a numerical examination of the effect of microtexturing negative rings’ structure on the tribological performance of parallel bearing couples’ cell. Three mcirotexturing rings, which are circle, square and ellipse, were chosen and the analysis model were established. We used the Reynolds equation coupled with finite difference method and successive over relaxation Gauss-Seidel iterative method to solve the Newtonian flow’s hydrodynamics within a bearing couple. The effect of texture density and radius ratio (thickness) of the microtexturing rings were investigated on the tribological performance under the similar operating conditions. The numerical simulation reveals that: 1) The microtexturing rings’ structure can homogenize the local pressure much uniformly within the bearing cell. 2) The tribological performance is determined mainly by the microtexturing rings’ geometry and texture density, and the thickness of the rings’ structure can help to change the quantitative values. 3) The square and circle rings’s microtexturing surface can slightly improve the frictional performance with the bearing cells’ gap, while the ellipse ring’s surface may decrease the frictional performance. 4) The ellipse rings’ microtexturing surface can achieve the minimum spacing gap but the maximum friction coefficient of the bearing couple, and then the circle and square rings’ structure take the second and third place, respectively 相似文献
5.
薛茂权 《常州轻工职业技术学院学报》2006,(4)
用粉末冶金法制备了Ni基合金材料,测试了合金在室温下的摩擦磨损性能,讨论了MoS2含量,载荷以及滑动速度对摩擦学性能的影响,同时还探讨了其减磨机理。研究结果表明,MoS2质量分数为6%的合金,在摩擦表面形成含硫化合物的复合膜而起润滑作用,具有较好的摩擦磨损综合性能。 相似文献
6.
Micron grade Sn powder, VG32 oil and active pharmaceutical were mixed and the Nanometer Sn lubricant additives were prepared. Nanometer additives with different Sn concentrations were used in Steel-brass Tribo-pair for friction and wear test. The activating method to nano-Sn and surface of brass samples was investigated, and the method to form relatively thick friction coating on samples was discussed. Surface elemental distribution, coating thickness and its surface appearance were analyzed with X-ray photoelectron spectrum (XPS), auger electron spectrum (AES) and scanning electron microscope (SEM) respectively. The result shows that the ultra-thick friction coating (approx 20 μm), with abundant tin and well combined with substrate, has formed on the brass sample. The friction coating revealed superior performance of friction reducing and anti-wear properties. Therefore, the results possess practical significance to self-repair usage on steel-brass tribo-pair in mechanical systems. 相似文献
7.
合成了一种水溶性抗磨剂壬基酚聚氧乙烯醚硫代磷酸锌盐化合物(ZnODTP-S),得出了其中间体壬基酚聚氧乙烯醚硫代磷酸酯(DTP-S)较佳的合成条件,即:原料摩尔比(OP-10:P2S5)为4:1;反应温度为100-120℃;反应时间为4-5h。利用四球试验机考察了该水溶性抗磨剂在水中的润滑性能,结果表明,该剂在水中具有优良的承载能力和抗磨性能。Auger电子能谱(AES)分析显示出该水溶性抗磨剂的抗磨性能与摩擦表面中存在锌、硫等活性元素有关。 相似文献
8.
对比有无磁场条件下铁磁性材料摩擦副的摩擦学性能,发现直流磁场的存在显著改善了铁磁性材料摩擦副的摩擦学性能。其主要原因是磁场的存在使磨屑保持摩擦副之间,从而铁磁性材料摩擦副的两体摩擦转变为摩擦副、磨屑之间的三体摩擦;同时,磁场的存在提高了氧化磨损在磨损中的比例。 相似文献
9.
采用四球试验机分别评价了不同温度下烘烤和不同比例的水对3种极压抗磨添加剂(T309,T306,T321)在复合锂基润滑脂中的磨擦学性能的影响。结果表明,温度和水对于三种极压抗磨添加剂的摩擦学性能都有很大的影响,其中温度和水对于T321的摩擦学性能影响最大,对于T306和T309的相比较而言影响较小。 相似文献
10.
在液相中依靠超声粉碎和剪切搅拌相结合的方法成功制备了Sn-Cd合金纳米微粒,并利用透射电子显微镜（TEM）、X-射线粉末衍射（XRD）、热分析（TG-DTA）等手段对合金纳米微粒的形貌和结构进行了表征,同时对合金纳米微粒用作润滑油添加剂的摩擦学性能进行了探讨. 相似文献