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偶件表面粗糙度对PTFE材料摩擦磨损性能的影响
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国家自然科学基金项目(51465026).


Effect of Surface Roughness of Matching Materials on Friction and Wear Properties of PTFE Materials
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    摘要:

    为了研究干摩擦条件下偶件表面粗糙度对聚四氟乙烯(PTFE)密封材料摩擦磨损性能的影响,利用MMW-1立式万能摩擦磨损试验机,在不同载荷和转速下研究由PTFE材料制作的试验环分别与316L不锈钢和45#钢配副时的摩擦磨损性能,并利用粒形分析仪对PTFE试验环试验前后端面的形貌进行观测;利用触针式轮廓仪对摩擦配副钢环的端面粗糙度进行精确测量,分析表面粗糙度对PTFE试验环摩擦磨损性能的影响。试验结果表明:在干摩擦条件下,摩擦配副钢环的表面粗糙度过高或者过低都会引起PTFE试验环磨损量的增加;定载荷时,PTFE试验环磨损量随摩擦配副钢环表面粗糙度的增大先减小后增大,随转速的增大而增大;定转速时,PTFE试验环摩擦因数随摩擦配副钢环表面粗糙度的增大稍减小后而后增大,随载荷的增大先减小后增大;在相同工况下,316L不锈钢对PTFE试验环的切削和犁沟作用比45#钢更加明显。

    Abstract:

    In order to study the effect of surface roughness of matching materials on friction and wear properties of polytetrafluoroethylene (PTFE) sealing materials under the condition of dry friction,based on MMW1 vertical universal friction and wear tester,the friction and wear properties of PTFE test ring against 316L stainless steel and 45 steel were studied under different load and speed,and the end face topography of PTFE test ring was observed by a particle shape analyzer.The surface roughness of the steel ring was accurately measured by a stylus profiler,and whose effect on the friction and wear properties of PTFE test ring was analyzed.The results show that under the condition of dry friction,too high or too low surface roughness of the steel ring will lead to a increasing of the wear of PTFE test ring.When the load is constant,the wear loss of PTFE test ring is decreased firstly and then increased with the increasing of the roughness of steel ring,and it is increased with the increasing of rotational speed.When the rotational speed is constant,the friction coefficient of PTFE test ring is firstly decreased slightly and then increased with the increasing of the roughness of steel ring,and it is decreased firstly and then increased with the increasing of load.The furrow action and the cutting action of 316L stainless steel on PTFE test ring are more obvious than that of 45 steel under the same conditions.

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康家明.偶件表面粗糙度对PTFE材料摩擦磨损性能的影响[J].润滑与密封,2018,43(8):87-92.
. Effect of Surface Roughness of Matching Materials on Friction and Wear Properties of PTFE Materials[J]. Lubrication Engineering,2018,43(8):87-92.

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  • 在线发布日期: 2018-09-03
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