| 摘要: |
| 针对柴油机强化程度不断提高引起的镀铬气缸套摩擦磨损问题，采用往复式电射流加工技术在镀铬气缸套表面制备直径 810 μm、深度 11 μm、面积占有率 20%、相交排布的电解微织构，研究其在边界润滑条件下的摩擦磨损性能。结果表明， 在载荷 22~66 MPa 范围内，相比于无织构气缸套，微织构气缸套可以有效降低摩擦因数和磨损量，在载荷 66 MPa 时摩擦因数和磨损量分别降低 12.3%和 10%；微织构气缸套往复滑动方向的磨痕明显减少，并且在个别区域微坑具有阻断磨痕的作用； 微坑内部和微坑之间平台上都含有 S、P、Zn 等元素的二烷基二硫代磷酸锌(ZDDP)的摩擦化学反应产物，这种产物多数以白亮斑点呈现，主要成分为硫化锌、短链磷酸盐等化合物。往复式电射流技术制备的电解微织构表面能有效改善镀铬气缸套摩擦磨损性能，可为镀铬气缸套微织构表面设计提供理论依据。 |
| 关键词: 镀铬气缸套 电解微织构 摩擦磨损 二烷基二硫代磷酸锌 |
| DOI：10.11933/j.issn.1007?9289.20220121002 |
| 分类号:TG156;TB114 |
| 基金项目:国家自然科学基金(51979018)、基础性科研院所稳定支持(WDZC-2019-JGKK-03)和中央高校基本科研业务费(3132019366)资助项目 |
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| Effect of Electrolytic Micro-texture on Friction and Wear Properties of Chromium-plated Cylinder Liner |
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XING Chuanfei1, SHEN Yan1, YUAN Xiaoshuai2, LIU Zhixiang1, FAN Junjing1, XU Jiujun1
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1.Key Laboratory of Shipbuilding Engineering and Transportation Industry,Dalian Maritime University, Dalian 116026 , China;2.China North Engine Research Institute, Tianjin 300400 , China
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| Abstract: |
| To address the friction and wear problem of chrome-plated cylinder liners caused by the increasing reinforcement of diesel engines, reciprocating electric jet processing technology is used to prepare an electrolytic micro-textured with a diameter of 810 μm, a depth of 11 μm, an area occupation of 20% and an intersecting arrangement on the surface of chrome-plated cylinder liners. The friction and wear properties under boundary lubrication conditions are studied. The results show that the micro-textured surface effectively reduces the friction factor and wear depth compared with the un-textured surface from 22 MPa to 66 MPa. At a load of 66 MPa, the friction factor and wear depth are reduced by 12.3% and 10%, respectively. The wear scars in the reciprocating sliding direction of the micro-textured cylinder liner are significantly reduced, and the micro-pits in individual areas have the effect of blocking wear scars. Zinc dialkyl dithiophosphate (ZDDP) tribe-chemical reaction products containing S, P, and Zn elements are distributed within the micro-dimples and on the platform between the micro-dimples. Most of these products appear as white and bright spots, and the main components are zinc sulfide, short-chain phosphates, and other compounds. The experiment demonstrates that the electrolytic micro-textured surface prepared by reciprocating electric jet technology effectively improves the friction and wear Performance of the chromium-plated cylinder liner. This paper provides a theoretical basis for the design of the micro-textured surface of the chrome-plated cylinder liner. |
| Key words: chromium-plated cylinder liner electrolytic micro-texture friction and wear zinc dialkyl dithiophosphate (ZDDP) |
