【摘要】 研究了钛合金微坑型表面微结构与Si3N4对磨时的水润滑摩擦学性能。利用激光技术在钛合金表面加工出尺度不同的微坑,运用正交试验设计分析了微坑直径、深度和面积比3个因素对钛合金水润滑摩擦学性能的影响。正交试验研究结果表明,参数合适的微坑型表面微结构能有效降低钛合金/Si3N4摩擦副在水中的摩擦因数。微坑型表面微结构的直径对钛合金/Si3N4摩擦副在水中的摩擦因数影响很大,而微坑面积比对钛合金磨损量的影响比较明显。在微坑直径为200μm、面积比为10%及深度为20μm时,钛合金/Si3N4摩擦副在水中稳态摩擦因数最小,而在微坑直径为350μm、面积比为5%和深度为20μm时,钛合金的磨损率最小。更多还原

【Abstract】 The friction and wear properties of the micro-dimple surface sliding against Si3N4 balls in water were investigated.Laser surface texturing(LST) was used to manufacture micro-dimples at different scales on the Ti alloy surface.The influences of the diameter,depth and area ratio of micro-dimples on the tribological properties of the Ti alloy in water were analyzed using the orthogonal experiment method.It is shown that micro-dimples with proper parameters can effectively reduce the friction coefficient of the Ti alloy/ Si3N4 tribopair in water.The diameter exhibits the most influence on the friction coefficient of the Ti alloy/ Si3N4 tribopair,while the area ratio shows obvious effect on the wear loss of the Ti alloy.When the micro-dimple has the diameter of 200 μm,the area ratio of 10% and the depth of 20 μm,the Ti alloy/ Si3N4 tribopair shows the minimum stable friction coefficient in water.Meanwhile the Ti alloy/ Si3N4 tribopair shows the minimum wear rate of the Ti alloy when the micro-dimple has the diameter of 350 μm,the area ratio of 5% and the depth of 20 μm.更多还原