重介质管路中平板闸阀的寿命研究

通过分析了重介质系统管路中平板闸阀存在的问题,提出了延长平板闸阀的使用寿命的措施为:设计合理的结构和选择适当的材料.实践证明:该结果是可行的.     

DLC涂层应用于活塞环

本文介绍了采用PVD处理方法获得的DLC涂层,针对DLC涂层应用于活塞环,提高活塞环耐磨、减摩性能做了重点介绍,并叙述了该领域的发展现状及趋势。     

DLC涂层应用于活塞环

本文介绍了采用PVD处理方法获得的DLC涂层，针对DLC涂层应用于活塞环，提高活塞环耐磨、减摩性能做了重点介绍，并叙述了该领域的发展现状及趋势。     

一种加锑减锡的铜基减摩材料的研制

在6－6－3青铜基含油轴承的基础上，进行了减锡加锑的试验，研制出了符合ZBW90002—88要求性能以锑部分代替锡的新合金，为节约锡资源、开辟锑的应用领域指出了一条新途径。     

Highly-dispersible boron nitride nanoparticles by spray drying and pyrolysis

A spray drying and pyrolysis synthesis route was developed and it successfully prepared boron nitride (BN) nanoparticles with high dispersivity. During the experiment, the extremely rapid drying of the boric acid/urea solution during the spray-drying process resulted in the formation of homogeneous precursors, which was the key for the final pyrolysis synthesis of BN nanoparticles with high dispersibility and uniform diameters (~20 nm). Compared with boron nitride synthesized without using spray drying, the as-prepared BN nanoparticles possess higher specific surface area (145.01 m² g⁻¹) and larger pore volume (0.41 cm³ g⁻¹). Especially, we used the BN nanoparticles as lubricant and incorporated it into the liquid paraffin (LP). The experiment results show that the LP presents outstanding antifriction properties for a BN content of 1.5 wt%. These results suggest that the h-BN nanoparticles have significant potential applications in the field of tribology.     

Cr——氟化石墨复合镀层在高温轴承中的应用研究

本文对热轧钢运输链上的轴承进行失效分析，找出了主要失效的原因。采用自润滑Ｃｒ－氟化石墨复合镀层代替轴承中的脂润滑。利用电沉积工艺制备了Ｃｒ－氟化石墨镀层，并在摩擦磨损试验机上对镀层进行摩擦系数和耐磨性的试验研究，认为润滑剂存在时，镀层中氟化石墨的含量不影响摩擦系数。在干摩擦时，镀层中氟化石墨的含量增加，摩擦系数随这降低。镀层的耐磨性主要取决于镀层的硬度。     

Properties of silver-indium alloys electrodeposited from cyanide electrolytes

In this study an attempt was made to determine some structural and physicochemical characteristics of electrodeposited Ag-In coatings. Heterogeneous compact coatings with an indium content of up to 50 wt.% can be deposited from the cyanide electrolytes. The indium coatings have negative internal stress. The alloy coatings have small positive internal stress similar to the silver coatings, deposited from the alloy electrolyte in the absence of indium. The increase of the indium content in the alloy coatings leads to a decrease in their microhardness and abrasion resistance, to an increase in their roughness, and significantly improves their antifriction properties.     

穿越黄浦江大口径长距离泥水平衡顶管的施工技术

本文主要针对上海世博北京西路～华夏西路电力电缆隧道（三标）工程7^#-6^#工作井区间穿越黄浦江的实际施工情况,探讨穿越黄浦江的大口径长距离泥水平衡顶管施工技术。通过总结实际的顶管施工经验,提出了目前在黄浦江大口径长距离泥水平衡顶管施工中存在的3个主要问题：进、出洞的处理,特殊土层掘进机的施工,复杂土质环境的减摩注浆方法。针对其提出了新的建议,为今后类似大口径泥水平衡项管穿越黄浦江及粉质粘土层施工提供参考。     

Pulsed laser deposition of antifriction thin-film MoSex coatings at the different vacuum conditions

MoSe_x coatings were obtained by pulsed laser deposition in vacuum at the pressure of background Ar gas up to 10 Pa. The deposition temperature was 200 °С. The films were studied by means of X-ray diffraction, scanning and transmission electron spectroscopy, X-ray photoelectron spectroscopy, and Rutherford backscattering spectroscopy of helium ions. The tribological properties of thin-film coatings were investigated by pin-on-disk testing in air with 50% relative humidity. In addition, wear tracks were studied by micro-Raman spectroscopy. Chemical composition, structure, and tribological properties of the coatings were found to be sensitive to the presence of the inert gas. Thus, increasing the gas pressure from 10^− 4 to 10 Pa changes the chemical composition, so that the ratio of the atomic concentrations of Se and Mo (x = Se/Mo) increases from 1.5 to 2.4 in the principal deposition zone. The changing of the structure concerns the accumulation of distortions in the lattice of MoSe_x nano-crystals as increasing the distance between the basal planes and intensive formation of nano-sized inclusions of the amorphous phase and Mo nano-crystals in the volume of the coatings. At the optimal gas pressure (∼ 2 Pa), the composition of the coating was close to the stoichiometric one, and the layer adjacent to the substrate consisted of MoSe_x nano-crystals with the basal planes parallel to the substrate surface or oriented at small angles to the surface. The thickness of the oriented layer in such coatings was greater than the thickness of the similar layer in the coatings deposited in vacuum (10^− 4 Pa). The tribological properties of MoSe_x coatings deposited on substrates of stainless steel type 95 × 18 (18 at.% Cr) depend on the gas pressure. The friction coefficient in air decreases from 0.08 for deposition at the background pressure of 10^− 4 Pa to 0.04 for deposition at the optimal pressure. This change in the deposition conditions has only a marginal effect on the coating durability. Means to increase the durability are also considered.     

冲压过程中的摩察、磨损及润滑

研讨冲压过程中的摩擦与润滑机理，按冲压工艺的性质，选用适宜的润滑剂，辅以有效的润滑方式，是提高冲压生产技术的有效途径之一。