海水润滑下几种聚酰亚胺材料高副摩擦学性能

摘要

利用销盘摩擦实验研究4种聚酰亚胺(PI)材料,即均苯型JHPI-30、聚合热压板材YS20、缩聚热压板材P84以及均苯型添加质量分数15％石墨的SP21,与17-4PH配对在海水环境中高副摩擦学性能.通过摩擦因数、磨损体积测量和表面形貌分析,研究几种PI材料黏弹性、拉伸强度和弯曲强度等性能对摩擦磨损的影响.结果表明:研究的4种PI材料中SP21的摩擦因数和磨损量均最小,P84次之;JHPI-30、YS20的磨损机制为塑性变形和磨粒磨损,P84是轻微的塑性变形和轻微的磨粒磨损,SP-21是轻微的磨粒磨损.SP-21具有最好的抗磨减摩性能,相比其他3种材料更适宜作为海水润滑下高副材料.%The higher-pair tribological performances of four kinds of polyimide materials against 17-4PH,including polypyromellitimide JHPI-30,hot-press polymerization YS20,hot-press polycondensation P84 and 15％ graphite polypyromellitimide SP21,were studied by pin-on-disc friction experiment under seawater lubrication.The effects of viscoelasticity,tensile strength,flexural strength of the several polyimide materials on the friction and wear of the polyimide materials were analyzed through measuring the frictional coefficient and wear volume,and analyzing surface topography.The results show that SP21 material has the lowest friction coefficient and wear volume in the 4 PI materials studied,following by P84 material.The wear mechanism of JHPI-30 and YS20 materials is plastic deformation and abrasive wear,P84 material is slight plastic deformation and slight abrasive wear,and SP-21 material is slight abrasive wear.SP-21 material has the best friction reducing and anti-wear properties,it is the most suitable material for high-pair under seawater lubrication.