板带钢热轧纳米润滑实验研究

通过在不同润滑条件下的热轧润滑实验,研究纳米润滑对板带钢热轧过程中轧制工艺参数、轧后表面质量及氧化层厚度的影响。结果表明:采用纳米润滑能够保证轧制过程顺利进行,相比传统轧制液能够降低轧制力10%~16.3%,减少终轧厚度10.8%;同时能降低板带钢表面粗糙度,显著改善轧后表面质量;采用纳米润滑时板带钢轧后氧化层厚度只有7μm左右,且氧化层致密、均匀,空洞、裂纹等缺陷较少。     

铝材轧制工艺润滑与表面质量

本文用系统方法进行了铝材润滑轧制过程的摩擦学分析，论述了铝材热轧与冷轧过程的工艺润滑机理及润滑剂评价，最后，提出了铝材轧制表面质量控制系统。     

带钢热轧工艺润滑的实验研究

通过不同润滑条件下特殊钢带热轧实验和分析，研究了工艺润滑与带钢热轧过程中的轧制压力、压下率、带钢厚度的关系，并探讨了热轧油特性，油水混合浓度、使用温度等条件对热轧工艺润滑效果的影响。实验结果表明：采用工艺润滑后保证了轧制过程顺利进行，其中，使用高效热轧油轧制Ti-IF钢可以降低轧制压力15％～20％，而在轧制合金钢或轴承钢时压下率明显增加，从而在原有轧机上能够生产出更薄的产品。     

一种新型热轧带钢轧制润滑系统

分析国内各热轧带钢厂普遍使用的轧制润滑系统存在的问题。针对原轧制润滑系统存在的管路和喷嘴易堵塞,系统设备维护工作量大等问题,提出一种新型的轧制润滑系统,并介绍该系统的技术特点。该新型轧制润滑系统能最大程度发挥轧制润滑系统的功能,以达到提高带钢表面质量和降低生产成本的目标。     

铜带轧制变形区摩擦润滑状态研究

观察分析了轧制变形区形貌特征,研究了不同方向粗糙度对轧制润滑的影响。在轧制变形区并存边界润滑和流体动压润滑;轧辊与轧制的塑性挤压边界接触是获得高光亮表面的必要条件。轧后轧件表面粗糙度Ｒａ和丰满度Ｋ趋向于满足一定润滑条件的最佳值。     

齿轮表面质量和润滑条件对齿面承载能力的影响

本文研究了同一种材料齿轮在不同表面质量和润滑条件时的失效机理、失效形式及相应承载能力的影响，讨论了如何更准确地控制齿轮润滑状态。     

热轧润滑轧制系统设计

热轧润滑轧制技术是实用性很强的应用技术,对于热轧轧制是一项技术创新.在国内外取得了显著的成效,且积累了相当丰富的经验,在国内的许多钢铁厂的热轧机组上得到了应用,使用热轧润滑轧制技术能明显降低轧制力,降低能耗,降低轧辊磨损消耗,明显改善带钢表面质量,使轧制薄规格的带钢成为现实.由于所对应的热轧机组不同,其工艺要求不同所设...     

热轧机械中润滑技术的应用

本文作者结合自己多年工作经验,介绍了当代热轧机械当中润滑技术的应用以及其所起到的关键作用。     

CSP热轧工艺润滑效果研究

在理化性能与摩擦学性能测试分析的基础上,对CSP热轧板带钢工艺润滑应用效果进行轧制过程研究。工业应用试验表明:CSP热轧板带钢过程中,并非热轧油体积比越高,工艺润滑效果越好,选择中低黏度、润滑性能良好的热轧油,其体积分数在0.2%时即可平均降低轧制力10%～20%,使连轧过程张力波动控制在20%以内,同时对冷却水的污染也不明显。摩擦学测试和轧制工艺润滑应用试验数据分析表明,控制热轧油体积分数在1%以下即可满足热轧工艺润滑作用效果。可根据具体轧制产品与工艺对热轧油黏度和用量做出相应调整,应以保证CSP热轧生产平稳进行和对冷却水少污染为评价标准,而并非轧制压力的降低值。     

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.     

工艺润滑对带钢表面清洁度的影响

分析了影响带钢表面清洁度的各种因素,包括乳化液类型及性能参数、乳化液系统和轧制的工艺参数.介绍了轧后带钢表面残油、残铁含量的差重测量法,并采用差重法测量评定了某轧后带钢表面清洁度,计算了其表面残油、残铁含量,提出了提高乳化液润滑性能和优化乳化液系统的措施,从而改善了带钢表面清洁度.     

钢板微观表面质量控制理论与技术研究进展

分析给出钢板表面质量缺陷的分类及描述,重点阐释与表面微观形貌相关的钢板微观表面质量缺陷;结合钢板微观表面质量控制的工艺原理,综述国内外针对钢板微观表面质量生成与控制的关键——钢板表面微观形貌的表征与轧制转印生成、轧辊表面微观形貌的磨损演变、钢板表面的视觉美观性和涂镀黏附性与冲压储油性的描述与建模等方面的重要研究进展及成果;分析总结目前钢板微观表面质量的理论研究与生产实践中存在的主要问题,提出进一步开展钢板微观表面质量控制理论与技术研究的若干建议,展望当前在我国着力开展钢板微观表面质量研究的科学意义和应用前景。     

露天采矿设备润滑状态监测与故障诊断

主要介绍了几种设备润滑状态监测方法,论述了如何对露天采矿设备进行润滑状态监测,并提出利用设备润滑状态监测结果进行露天采矿设备故障诊断。通过设备预防性维修,避免设备故障扩大,从而提高设备可用率,降低设备维修成本。     

A New Method for Measuring the Film Thickness of Mixed Lubrication in Line Contacts

In the present paper, an optical method, called frustrated total reflection (FTR), for measuring the film thickness of mixed lubrication in line contacts is proposed. The principles of FTR are analyzed. The relationship between the reflectivity and the film thickness is derived. The measuring methods and procedures are described.     

Lubrication of Strip Rolling in the Low-Speed Mixed Regime

An analytical model for strip rolling in the low-speed mixed lubrication regime is developed. An average Reynolds equation for longitudinal saw-tooth surfaces under conditions of high fractional contact area, is combined with an analysis for asperity flattening under conditions of bulk plastic flow, to treat lubrication in the mixed regime. Analyses for the inlet zone and work zone and the influence of pressure on viscosity are included in the model. The model indicates that hydrodynamic lubrication effects are important at much lower speeds than previously considered possible. The film thickness predicted by the model is somewhat smaller than that measured using the oil drop method in rolling aluminum alloy with a mineral oil.     

The Influence of Polydimethyl Siloxane on the Friction and Wear of Polyphenylene Oxide Under Boundary Lubrication Conditions

Experiments are described in which polyphenylene oxide (PPO) specimens were first slid against EN31 steel in the presence of polydimethyl siloxane (silicone fluid) and then slid without any external injection of silicone fluid until the friction reached the value characteristic of dry conditions. Nominal Hertzian line-contact conditions were maintained throughout each experiment (despite the wear of the PPO) by slowly rotating the PPO pin about its cylindrical axis while its flat end-face was itself sliding against the cylindrical surface of the EN31 steel cylinder, thereby maximizing the possibility of true boundary lubrication. These experiments showed that the modified surface layer produced during sliding in silicone fluid is the result of adsorption of the fluid into the polymer and that absorption is primarily a consequence of the wear process itself. Electron probe microanalysis and Rutherford back-scattering of α-particles were used to examine the worn polymer surfaces to show that some migration of fluid from the surface layers into the bulk polymer must occur. Thermomechanical analysis was also used to show that the silicone fluid penetrating the surface of PPO during wear leads to plasticization rather than a simple physical mixing. The results are dicussed in terms of previous work showing that only traces of fluid are necessary for polymer lubrication. The importance of ensuring that truly boundary lubrication conditions operate in polymer/metal systems is emphasized, especially if the system is expected to eventually function in starved lubrication conditions. Suggestions are made for further work necessary to substantiate (a) the possibility that the uptake of fluid occurs through surface cracks and fissures caused by the high stresses occuring at those asperity contacts not protected by a fluid film and (b) the possibility that once induced into a surface layer of a Polymer, the fluid can provide almost limitless protection from high frictional forces (at the expense, however, of significant wear of the polymer).