Effects of femtosecond laser microstructures on the tribological properties of rock bit bearings wit

• 作 者: Lin Zhong Guo-rong Wang Wenling Liao Xia He Qingyou Liu Yang liao
• 机 构: SchoolofMechatronicEngineering,SouthwestPetroleumUniversity,Chengdu,ChinaStateKeyLaboratoryofHighFie
• 出 处: 第十一届全国表面工程大会暨第八届全国青年表面工程学术会议
• 发表日期: 2016年10期
• 关键词: femtosecond laser surface texture rock bit sliding bearing non-Newtonian lubrica

　　In this paper, the tribological characteristics of the unit tribo-pairs of rock bit sliding bearings (RBSB) under various loads and high temperatures were investigated. The conical textures, distributed in beryllium bronze surfaces with depth-diameter ratios of 0.087-0.483, were fabricated using femtosecond laser irradiation. The friction characteristics of the 20Crn mo/beryllium bronze tribo-pairs were tested at a high temperature of 120oC and under non-Newtonian lubrication conditions using pin-on-disc configurations. The textured surfaces with depth-diameter ratios of 0.165 and 0.483 exhibited excellent lubrication and wear-resistant properties. In addition, the effects of the operating conditions on the tribological performance of the tribo-pairs were discussed.