| 摘要: |
| 以 CKS(铬基陶瓷复合镀)活塞环-硼磷合金铸铁气缸套摩擦副为对象,采用 Nd-YAG 激光器在 CKS 活塞环上进行微织构化处理,在对置往复式摩擦磨损试验机上进行摩擦学试验,研究激光微织构几何形貌及排布方式对摩擦副减摩耐磨的作用。 采用激光共聚焦扫描显微镜利用台阶法测量磨损量,采用扫描电子显微镜观察样品表面磨损形貌。 发现当织构深度 30 μm、直径 130 μm、排布角度 0 °、面积占有率 5%时,摩擦副获得最佳的摩擦磨损性能,摩擦因数最低可达 0. 086,与未织构化的摩擦配副相比,摩擦因数降低约 0. 013,降低约 13%;活塞环磨损率下降约 41%,气缸套磨损率下降约 46%。 活塞环表面微织构可改善摩擦磨损性能的作用机制为,微织构具有储存润滑油、收集磨屑以及减小摩擦副接触面积的作用。 |
| 关键词: CKS 活塞环 微织构 几何形貌 排布方式 摩擦磨损 |
| DOI：10.11933/j.issn.1007-9289.20210121002 |
| 分类号:TG156;TB114 |
| 基金项目:国家自然科学基金(51509029)、辽宁省自然科学基金(2019-ZD-0165)、中国博士后科学基金(2020M670729)和中央高校基本科研业务费 (3132019366)资助项目 |
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| Effect of Geometrical Morphology and Arrangement of Micro-texture on Friction Property of CKS Piston Ring |
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He Dong1, Han Xiaoguang1,2,3, Chen Guangcong1, Wang Zheyu1, Chen Wenbin1, Xu Jiujun1,2,3
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1.Materials Science and Engineering Department, Dalian Maritime University, Dalian 116026 , China;2.International Joint Research Center for Subsea Engineering Technology and Equipment, Dalian Maritime University, Dalian 116026 , China;3.Key Laboratory of Ship-Machinery Maintenance & Manufacture, Dalian Maritime University, Dalian 116026 , China
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| Abstract: |
| The micro-textures with different geometric morphologies and arrangement modes were produced on the surface of piston rings by Nd-YAG laser to modify the friction and wear property of the CKS(Chromium based ceramic composite plating) piston ring- cast iron cylinder liner friction pair. The friction and wear test was carried on a reciprocating friction and wear tester. The wear loss of the friction pair was measured by bench method on a OLS 4000 type laser confocal scanning microscopy and wear morphologies of the specimen were observed by a SUPRA 55 type scanning electron microscope (SEM). The optimum friction and wear properties were ob- tained on the textured CKS piston ring with texture parameters of 30 μm depth, 130 μm diameter, arrangement angle of 0° and area density of 5%. Compared with the un-textured friction pair, the optimal pair has a reduced friction coefficient of about 0. 013, and the wear rates of the piston ring and cylinder liner were reduced by about 41% and 46%, respectively. The surface texture can store lubri-cating oil, collect abrasive particles and change the contact surface area, which are responsible for the modification of the friction andwear performance of the piston ring-cylinder liner. |
| Key words: CKS piston rings micro-texture geometric morphology arrangement mode friction and wear |
