SiCp含量及粒度对锌基复合材料高温摩擦磨损性能的影响

研究了ＳｉＣｐ／ＺＡ２７复合材料粒子含量、粒度对其不同温度下的磨损行为的影响，探讨了磨损机制。结果表明：ＳｉＣｐ的加入明显提高ＺＡ２７的高温耐磨性能，且随其数量的增多而增强；ＳｉＣｐ的粒度有一最优值。其磨损机制与ＳｉＣｐ的粒度、含量以及测试温度有关。耐磨性增加的主要原因是ＳｉＣｐ提高了基体抵抗变形的能力。     

二种锌铝合金和一种铝青铜在重载和润滑条件下摩擦磨损特性的研究

试验对比了锌铝合金ＨＤＺＡ、ＺＡ－Ｓｉ和铝青铜ＺＣｕＡｌ１０Ｆｅ３在重载及四种润滑剂润滑条件下的摩擦磨损特性。研究结果表明，ＨＤＺＡ合金和ＺＡ－Ｓｉ合金在润滑脂润滑条件下的摩擦磨损性能明显优于机油润滑；而ＺＣｕＡｌ１０Ｆｅ３合金在常用润滑脂润滑条件下的摩擦磨损性能远不及这二种锌铝合金。油润滑时，磨损机制是犁削、辗压和粘着；脂润滑时，磨损机制主要是辗压，基本上无粘着。油和脂的润滑特性，影响合金的摩擦磨损特性     

颗粒增强ZA27基复合材料的摩擦磨损行为

用挤压浸渍法制备了ＳｉＣｐ／ＺＡ２７及Ａｌ２Ｏ３ｐ／ＺＡ２７复合材料,讨论了颗粒含量及种类对复合材料边界润滑条件下磨损性能的影响;对复合材料的摩擦磨损行为进行了研究。结果表明,随着颗粒含量的增加,复合材料的耐磨性增强,摩擦系数增大。复合材料的磨损以粘着磨损和磨粒磨损为主。     

SiCp／ZA27复合材料的力学性能及耐磨性研究

采用搅拌法制备了不同 Ｓｉ Ｃｐ 含量的 Ｓｉ Ｃｐ／ Ｚ Ａ２７ 复合材料,对其抗拉强度、伸长率、硬度及耐磨量进行了测定。结果表明：与 Ｚ Ａ２７ 基体材料相比, Ｓｉ Ｃｐ／ Ｚ Ａ２７ 复合材料的抗拉强度、伸长率有所下降,硬度有所提高;而其耐磨性,尤其在重载条件下,明显高于基体材料。     

SiCp颗粒增强AZ80镁合金的摩擦磨损特性

本文研究了喷射搅拌铸造法制备的ＳｉＣｐ／ＡＺ８０复合材料的摩擦磨损性能。结果表明：复合材料的耐磨性优于基体合金；复合材料磨损表面存在由ＧＣｒ１５对磨环转移的富铁层，使复合材料－ＧＣｒ１５摩擦副的摩擦系数比ＡＺ８０－ＧＣｒ１５摩擦副低；复合材料的对磨环磨损量大于基体合金的对摩环磨损量，但复合材料摩擦副的总磨损量比基体合金摩擦副的小。     

高强度锌铝合金摩擦磨损特性的试验研究

采用ＭＭ２００磨损试验机，测定和对比了铸造锌铝合金（ＺＺｎＡｌ２７Ｃｕ２Ａ和ＺＺｎＡｌ２７Ｃｕ２Ｄ）和工业上常用铜合金（ＺＣｕＳｎ６Ｚｎ６Ｐｂ３，ＺＣｕＡ１１０Ｆｅ３和ＺＣｕＺｎ３３Ｍｎ２Ｐｂ２）的摩擦磨损特性。试验测定了合金在不同载荷和转速条件下的摩擦系数和磨损量及其对配对材料的磨损，结果表明，锌铝合金是一种更适于在重载低速条件下使用的减摩材料     

ZA27合金气焊接头耐磨性能的研究

对不同载荷作用下，用ＺＡＢ、ＺＡ１２、和ＺＡ２７焊丝气焊的ＺＡ２７合金接头熔数金属的耐磨性能进行了研究。结果表明，随熔敷金属中Ａ１含量增加，载荷降低，耐磨性提高。     

SiCp／ZA27复合材料的摩擦磨损性能

探讨了不同含量、不同大小ＳｉＣｐ增加ＺＡ２７复合材料的摩擦磨损特性，并借助ＳＥＭ，ＥＤＡＸ对磨面及其剖面、磨屑进行了分析。     

La对ZA27合金组织,机械性能及摩擦磨损特性的影响

研究了Ｌａ对ＺＡ２７合金组织、常温机械性能的影响，并测定了ＺＡ２７（Ｌａ）合金的摩擦磨损特性。结果表明：Ｌａ可以细化合金初生ａ′相，改善共晶相的形貌与分布，提高合金的塑性和韧性指标；ＺＡ２７（Ｌａ）合金的摩擦磨损特性优于ＺＱＳｎ６－６－３     

SiCp颗粒复合对ZA27合金耐磨性能的影响

用铸造法制备了ＳｉＣｐ／ＺＡ２７复合材料,用ＭＭ２００磨损试验机,测定和对比了基体合金和不同颗粒含量复合材料在不同载重下的磨损量。结果表明：在重载条件下,复合材料的耐磨性远高于基体材料。     

激光表面织构化对45钢摩擦磨损性能的影响

目的研究表面织构对45钢干摩擦和乏油状态下摩擦磨损性能的影响。方法用激光加工的方法在45钢表面加工出不同面密度的凹坑织构,在UMT-2型多功能摩擦磨损试验机上以球-盘副考察凹坑密度在干摩擦和乏油条件下对45钢摩擦磨损性能的影响。结果在干摩擦条件下,织构密度在4%时,摩擦配副的摩擦系数最小,稳定摩擦系数为0.56。随着织构密度的增大,摩擦系数也逐渐增大,当织构密度增大至16.2%时,配副摩擦系数最大,稳定摩擦系数为0.72。在乏油条件下,织构密度在4%时,摩擦系数为0.39,小于未织构试样摩擦配副。凹坑密度增大后,其摩擦系数大于未织构试样,但是均在0.43左右。在干摩擦和乏油条件下,织构化试样的磨损率都小于未织构试样,并且随着织构密度的增大,磨损率先减小后增加,织构密度在8.1%时,抗磨效果最好。结论表面织构能收集磨粒,储存润滑油,从而起到良好的减磨作用。     

ZA27纺锭锭底失效原因分析

研究铸造锌铝合金ZA27与锡青铜QSn6.5-0.1的摩擦磨损性能.发现在相同条件下ZA27合金的耐磨性好于锡青铜QSn6.5-0.1,但用ZA27合金制作的纺锭锭底却不如用QSn6.5-0.1制作的耐用,其原因是ZA27合金在凝固过程中产生的组织缩松,在润滑条件下进行磨损试验时,容易使润滑油及磨损中产生的粉末填入其中,从而影响了磨损实验的准确性.     

Effects of solid lubricants on friction and wear behaviors of the phenolic coating under different friction conditions

The phenolic coating filled with micro-MoS₂ or micro-graphite was prepared by spraying the coating precursors. The friction and wear behaviors of the unfilled and filled phenolic composite coating sliding against the steel ring were evaluated on an MHK-500 friction and wear tester under dry friction and under water lubrication conditions. The worn surfaces of the unfilled and filled phenolic coating and the transfer films formed on the surface of the steel ring were investigated using a scanning electron microscope (SEM) and an optical microscope (OM), respectively. FTIR analysis was performed to detect the chemical changes of the composite coating under different lubrication conditions. It was found that addition of graphite was effective in enhancing the wear life of the phenolic coating. Especially, the anti-wear ability of the phenolic coating was best when the content of graphite is 10 wt.%. However, the MoS₂ as filler was harmful to the friction and wear behaviors of the phenolic coating. The character of the fillers varied with the types of the solid lubricants and the transfer films of varied features formed on the counterpart steel ring, largely accounted for the different friction and wear behaviors of the unfilled and filled phenolic composite coating. Compared with under dry sliding, the phenolic composite coating filled with 10 wt.% MoS₂ or 10 wt.% graphite had lower friction coefficients and lower wear life under water lubrication. Since water hindered the formation of transferred films, and might penetrate and corrode the filler-matrix interface, the anti-wear ability of the phenolic composite coating reinforced with MoS₂ or graphite deteriorated under water lubrication.     

TiN-Coating Effects on Stainless Steel Tribological Behavior Under Dry and Lubricated Conditions

The tribological properties of magnetron sputtered titanium nitride coating on 316L steel, sliding against Si₃N₄ ceramic ball under dry friction and synthetic perspiration lubrication, were investigated. The morphology of the worn surface and the elemental composition of the wear debris were examined by scanning electron microscopy and energy dispersive spectroscopy. TiN coatings and 316L stainless steel had better tribological properties under synthetic perspiration lubrication than under dry friction. Among the three tested materials (316L, 1.6 and 2.4 μm TiN coatings), 2.4 μm TiN coating exhibits the best wear resistance. The difference in wear damage of the three materials is essentially due to the wear mechanisms. For the TiN coating, the damage is attributed to abrasive wear under synthetic perspiration lubrication and the complex interactive mechanisms, including abrasive and adhesive wear, along with plastic deformation, under dry friction.     

高速滚动轴承用TiNi60合金的润滑性能及油气润滑两相流流型的数值计算(英文)

销-盘摩擦磨损实验研究表明:TiNi60合金在PAO油润滑下具有优异的摩擦学性能,稳定阶段的平均摩擦系数由干摩擦的0.6降低到油润滑下的0.1,而且非常稳定。从SEM磨损形貌图可知:油润滑下TiNi60合金的磨损表面光滑,粘着磨损明显减弱。在实际研究中,仿真计算是获得高速滚动轴承在油气润滑下各项工作性能数据的有效方法。采用FLUENT数值计算了油-气两相流在水平管子内的流型分布,得到了最佳油、气的进口速度,为高速滚动轴承用TiNi60合金在油气润滑下的使用提供了理论依据。仿真计算结果表明:当空气速度为10m/s和油速度为0.05m/s时,可以得到最佳的环状流型分布。     

Characterization and tribological properties of composite 3Cr13/FeS layer

The 3Cr13 coating was prepared on the surface of 1045 steel by high velocity arc spraying method, and then treated by low temperature ion sulfuration to obtain the solid lubrication composite 3Cr13/FeS layer. SEM was used to observe the surface, cross-section and worn scar morphologies. XRD was utilized to analyze the phase structure. X-ray stress determinator was utilized to measure its residual stress. The nano-hardness and elastic modulus of composite 3Cr13/FeS layer were surveyed by the nano-indentation tester. The tribological properties were investigated on a ball-on-disk wear tester under dry and oil lubrication conditions. The results showed that the friction coefficient and wear scar depth of the composite 3Cr13/FeS layer were always lower than those of FeS film and 1045 steel under dry and oil lubrication conditions. Therefore the composite 3Cr13/FeS layer had excellent Friction-reduction and anti-wear properties.     

石墨增强聚酰亚胺在海水中的摩擦学性能

目的为石墨增强聚酰亚胺复合材料在海水环境下的摩擦学应用提供实验依据。方法利用SST-ST销/盘摩擦试验机,研究了质量分数为15%石墨增强聚酰亚胺复合材料与17-4PH不锈钢组成的摩擦副在海水介质中的摩擦学性能,并与干摩擦和纯水润滑条件下的摩擦学性能进行比较。结果聚酰亚胺复合材料在干摩擦下的摩擦系数和磨损体积最大,分别为0.134、1.930 mm~3。干摩擦条件下,聚酰亚胺复合材料的磨损表面存在较深的犁沟,在犁沟周围出现了材料塑性流动及粘着剥落现象,对偶件表面有聚酰亚胺复合材料转移。磨损机理主要表现为磨粒磨损、材料塑性变形以及粘着和剥落。在纯水润滑下,聚酰亚胺复合材料表面存在较多材料粘着撕裂现象,同时存在宽浅不一的犁沟,磨损机理主要为粘着磨损和磨粒磨损。在海水润滑下,复合材料的摩擦系数和磨损体积最小,分别为0.086、1.235 mm~3,材料磨损表面十分光滑,只有沿运动方向存在少量轻微犁沟,磨损机理主要表现为磨粒磨损。结论石墨增强聚酰亚胺复合材料在海水中的摩擦学性能优于干摩擦和纯水环境下的摩擦学性能。     

SiCp/ZA27复合材料的界面结构及耐磨性研究

通过扫描电镜和高分辩透射电镜观察，经选区电子衍射和微区化学成分分析，研究了SiCp／ZA27复合材料的界面结构及耐磨性。结果表明，SiC颗粒均匀地分布于ZA27合金中，界面结合良好，SiCp颗粒周边存在着大量的CuZn4化合物。CuZn4依附于SiC颗粒形核，沿SiC晶面长大速率大于垂直于SiC晶面的长大速率。SiC颗粒显著地提高了ZA27合金的耐磨性。当SiC颗粒含量达30％时，耐磨性提高了126．5倍。