Effects of PTFE on Tribological Properties of Steel-backed UHMWPE Fiber Fabric Composites

doi:10.3969/j.issn.1004-132X.2022.12.010

Abstract

Abstract: In order to improve the tribological properties of the composite under the oil-free or grease lubricating environments of ships, the PTFE was combined with the steel-backed UHMWPE fabric composite according to different mass fractions. The tribological characteristics of composites countered with 45 steel discs were studied under various rotating speeds in dry friction conditions. The friction coefficient and the wear rate were recorded. The surface profiler, scanning electron microscope and super deep scene microscope were used to observe and analyze the wear surface morphology of the composites and the counterparts. Research results show that the tribological properties of all PTFE-filled composites are better. With the increase of PTFE contents, the tribological properties of the composites decrease. Among them, the 1% mass fraction PTFE-filled composites are the best, while under the test conditions the abrasive wear mainly occurs; Composites with higher PTFE contents mainly experience adhesive wear and fatigue wear at high speeds due to agglomeration and frictional heat accumulation.

Key words: polytetrafluoroethylene（PTFE）, ultra-high molecular weight polyethylene （UHMWPE）fabric, friction and wear, composite

摘要： 为改善广泛应用于船舶苛刻环境无油/脂润滑摩擦配副材料的摩擦学性能，将聚四氟乙烯（PTFE）按不同质量分数与钢背超高分子量聚乙烯纤维织物复合材料结合，研究它与45钢盘在变转速环环端面干摩擦状态下的摩擦学特性。对试验过程中摩擦因数及磨损量进行测量，利用表面轮廓仪、扫描电子显微镜与超景深显微镜对复合材料及对磨件磨损表面形貌进行了观察与分析。结果表明：所有填充PTFE的复合材料摩擦学性能均表现优异，随着PTFE含量的增加，复合材料摩擦性能变差，其中1 %（质量分数） PTFE填充复合材料综合摩擦性能最好，在试验工况下主要发生磨粒磨损，PTFE填充量较高的复合材料在高速下由于团聚及摩擦热量积聚主要经历黏着磨损与疲劳磨损。

关键词: 聚四氟乙烯, 超高分子量聚乙烯纤维织物, 摩擦磨损, 复合材料

CLC Number:

TH117.1

LIN Yudong, GUO Zhiwei, YUAN Chengqing, . Effects of PTFE on Tribological Properties of Steel-backed UHMWPE Fiber Fabric Composites[J]. China Mechanical Engineering, 2022, 33(12): 1484-1492，1503.

林羽东, 郭智威, 袁成清, . 聚四氟乙烯填充含量对钢背超高分子量聚乙烯纤维织物复合材料摩擦学性能的影响[J]. 中国机械工程, 2022, 33(12): 1484-1492，1503.

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