| 摘要: |
| 纤维织物增强钢背复合材料因具备优异的力学与摩擦学性能在航空航海等领域备受关注,在无油或少油工况下具有较好的应用前景。 使用改性处理的超高分子量聚乙烯(Ultra-high molecular weight polyethylene,UHMWPE)纤维织物作为增强材料,利用环氧树脂热压在不锈钢环上制备 UHMWPE 纤维织物增强钢背复合材料,研究其与 45 钢盘在环-环端面干摩擦状态下的摩擦学特性,考察纤维织物层数与摩擦转速对材料摩擦学性能的影响,对磨损前后复合材料厚度及 45 钢质量进行测取, 利用表面轮廓仪与扫描电子显微镜对复合材料及对偶件磨损面进行观察与分析。 结果表明,三种织物结构均能改善不锈钢的摩擦磨损特性,其中一层织物结构所表现的综合摩擦特性最好,在试验工况下摩擦因数与磨损率平均降低了 77. 7%与 67. 2%,在试验工况下主要发生磨粒磨损;二层与三层织物由于具备下层织物的支撑,故在较高转速下能保持材料自身良好的摩擦学特性,二层织物在试验工况下摩擦因数与磨损率平均降低了 71. 5%与 65. 7%,三层织物则为 73. 1%与 60. 3%,由于摩擦热量的积聚同时伴有树脂碎屑与破碎纤维的加入,其在高速下主要经历黏着磨损与疲劳磨损。 试验表明,织物结构于干摩擦工况下表现出较优的摩擦特性与可靠性,能较好地胜任无油或少油作业。 |
| 关键词: UHMWPE 纤维织物 钢背 摩擦磨损 复合材料 |
| DOI：10.11933/j.issn.1007-9289.20201214001 |
| 分类号:TB331;TH117 |
| 基金项目:国家自然科学基金青年科学基金项目(51509195) |
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| Tribological Properties of Steel Backing UHMWPE Fabric Composite |
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Lin Yudong1,2, Guo Zhiwei1,2, Yuan Chengqing1,2
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1.School of Energy and Power Engineering, Wuhan University of Technology, Wuhan 430063 , China;2.Reliability Engineering Institute, National Engineering Research Center for Water Transportation Safety, Wuhan 430063 , China
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| Abstract: |
| Fabric reinforced steel backing composites have attracted much attention in the fields of aviation and navigation since it owns excellent mechanical and tribological properties, which has good application prospects under oil-free or low-oil conditions. The modified ultra-high molecular weight polyethylene (UHMWPE) fabric was used as the reinforcing part, and the composites was attached to the stainless steel ring by hot pressing with epoxy resin. The tribological properties of the composites against 45 steel with a ring-on-ring configuration in dry sliding were studied. The influence of the number of fabric layers and the sliding velocity on the tribological proper- ties of the material was investigated. The thickness of the composite and the mass of the 45 steel before and after the tests was meas- ured. The profilometer and scanning electron microscope were used to observe and analyze the worn surface of the composites and their counterparts. The results show that the fabric layer can greatly improve the friction and wear characteristics of stainless steel, and with one layer exhibits the best tribological characteristics under the experiment conditions, while under the experimental conditions, the friction coefficient and wear rate are reduced by 77. 7% and 67. 2% on average, mainly produces abrasive wear; Due to the lower fab- ric, the composite with more layers can maintain the better tribological characteristics of the fabric itself at higher sliding velocity, the friction coefficient and wear rate of the two-layer fabric under the experimental conditions are reduced by 71. 5% and 65. 7% on aver- age, while the three-layer fabric are 73. 1% and 60. 3% respectively. Owing to the accumulation of frictional heat with accompanied by the addition of resin chips and broken fibers, it mainly experienced adhesive wear and fatigue wear at the higher sliding velocity. The Experiment shows that the fabric exhibits better tribological properties and reliability under dry conditions, which greatly suits oil-freeand oil-less conditions. |
| Key words: UHMWPE fabric steel backing friction and wear composite |
