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等离子喷涂MoS2处理改善液压泵滑靴副摩擦学性能
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国家自然科学基金资助项目(51805376;51505338)


Plasma-sprayed MoS2 Coatings Improve Tribological Behavior of Slipper/Swash Plate Pair in Hydraulic Pump
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    摘要:

    为了改善滑靴副的摩擦学性能,利用液压泵的压力冲击试验,确定滑靴和斜盘的材料组合方案。在此基础上,利用等离子喷涂技术在多元复杂黄铜表面制备MoS2固体润滑涂层,分析MoS2涂层对材料的摩擦因数和摩擦力矩的影响,测量材料的磨损量、磨损深度以及磨损率,利用扫描显微镜观察摩擦表面的磨损形貌。结果表明:在压力冲击场合下,多元复杂黄铜和球墨铸铁的磨损量最小;MoS2涂层结构比较致密且与多元复杂黄铜基体结合牢固,材料的摩擦因数为0.11~0.13,摩擦力矩为1.0~1.1 N·m;在对摩过程中,MoS2涂层的硫原子对铜和铁元素具有很强的活性,与配对材料发生摩擦化学反应,形成Cu2S和FeS的润滑转移膜,摩擦表面呈现黏着和轻微磨粒磨损特征。

    Abstract:

    In order to improve tribological behavior of slipper/swash plate pair, material combination schemes of slipper and swash plate are determined base on pressure shock test of hydraulic axial piston pump. Based on this, a solid lubrication Molybdenum disulfide ( MoS2) coating was prepared on multi element complex brass surface by plasma spraying technology, and effect of MoS2 coating on friction efficient and friction torque was investigated. Wear weight and depth of material were measured to calculate wear rate. The pattern of worn surfaces of screening materials were examined by means of scanning electron microscopy. The result shows that wear weights of multi element complex brass and ductile iron are smallest under condition of pressure impact. The MoS2 coating structure is quite dense and has good bond with multi element complex brass matrix. The obtained friction efficient is varied from 0.11 to 0.13 and friction torque is varied from 1.0 N·m to 1.1 N·m. Sulfur atoms have strong activity for copper and iron in the coating during friction. In friction, there sulfur atoms require the multi element complex brass and ductile iron that will produce the chemical reactions. The overall results are that friction surface establishes transfer lubrication film, such as Cuprous sulfide (Cu2S) and Ferrous sulfide (FeS), and shows adhesion and slight abrasive wear characteristics.

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肖朝昂,汤何胜,任燕,郭聪.等离子喷涂MoS2处理改善液压泵滑靴副摩擦学性能[J].机床与液压,2020,48(1):9-14.
. Plasma-sprayed MoS2 Coatings Improve Tribological Behavior of Slipper/Swash Plate Pair in Hydraulic Pump[J]. Machine Tool & Hydraulics,2020,48(1):9-14

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  • 在线发布日期: 2020-03-12
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