高分子复合润滑涂层对低碳钢表面摩擦学性能的影响
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摘要
为替代磷化-皂化处理工艺,通过浸涂高分子复合润滑液的方法在低碳钢试样表面制备涂层。利用HT-500型球盘摩擦试验机考察了低碳钢在高分子复合润滑涂层、磷皂化膜、无润滑介质这3种不同润滑条件下摩擦学性能,同时分析了干摩擦接触表面上摩擦切应力,并应用VHX-600K型超景深显微镜对磨损表面形貌观察,探讨磨损机制。结果表明:高分子复合润滑涂层与磷皂化膜具有相接近的润滑减摩特性,摩擦因数与干摩擦相比分别减小67.33%和68.79%,对摩初期5 min内前者略低2.1%,且减摩性能都较稳定。此外,磨损机制与不同润滑条件下的摩擦行为有关。干摩擦过程中,磨粒磨损、氧化磨损起主导作用;表面有磷皂化膜的摩擦磨损机制主要为轻微磨粒磨损与少量氧化磨损;高分子复合润滑涂层作用下,表面磨损程度最小,主要表现为轻微磨粒磨损。
To replace the surface treatment process by phosphating and saponification, a coating was prepared on the surface of low carbon steel sample by dipping method using water-based polymer mixed lubricant. Using HT500 ball-disk wear tester,tribological behaviors of low-carbon steel were investigated under three different lubricating conditions such as polymer mixed lubricant coating, film by Phosphating and saponification, and non-lubricants. Friction shear stress on the dry friction contact surface was also analyzed. The morphology of the worn surface was observed by VHX-600 K super depth of focus microscope,and the wear mechanism was studied. The results show that the polymer mixed lubricant coating has the effect of lubricating and antifriction which is similar to film by phosphating and saponification. Compared with the dry friction, the friction coefficient decreases by 67.33% and 68.79%, respectively, the former is slightly lower by 2.1% within 5 min of the initial friction, and the antifriction performance of both are steady relatively in the test. Additionally, friction and wear mechanism is related to friction behaviors under different lubricating conditions. In the dry friction process, the abrasive wear and oxidation wear play the leading role, and the wear mechanism of film by phosphating and saponification on the metal surface is slight abrasive wear and little oxidation wear, and the surface wear is the lightest under the polymer mixed lubricant coating while the wear mechanism is mainly slight abrasive wear.
To replace the surface treatment process by phosphating and saponification, a coating was prepared on the surface of low carbon steel sample by dipping method using water-based polymer mixed lubricant. Using HT500 ball-disk wear tester,tribological behaviors of low-carbon steel were investigated under three different lubricating conditions such as polymer mixed lubricant coating, film by Phosphating and saponification, and non-lubricants. Friction shear stress on the dry friction contact surface was also analyzed. The morphology of the worn surface was observed by VHX-600 K super depth of focus microscope,and the wear mechanism was studied. The results show that the polymer mixed lubricant coating has the effect of lubricating and antifriction which is similar to film by phosphating and saponification. Compared with the dry friction, the friction coefficient decreases by 67.33% and 68.79%, respectively, the former is slightly lower by 2.1% within 5 min of the initial friction, and the antifriction performance of both are steady relatively in the test. Additionally, friction and wear mechanism is related to friction behaviors under different lubricating conditions. In the dry friction process, the abrasive wear and oxidation wear play the leading role, and the wear mechanism of film by phosphating and saponification on the metal surface is slight abrasive wear and little oxidation wear, and the surface wear is the lightest under the polymer mixed lubricant coating while the wear mechanism is mainly slight abrasive wear.
引文
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[3]YAN F G,YAN S,LIU F,et al.An experimental study of antirust additives ratio for green water-based lubricant[J].Materials Science Forum,2011(697-698):88-92.
[4]ZHANG B M,SUN J L.Tribological performances of multilayer-MoS2 nanoparticles in water-based lubricating fluid[J].Materials Science and Engineering(Conference Series),2017(182):012-023.
[5]WU C,ZHANG H Q,JIA X M.Study on lubricating properties of nanographite-containing water-based lubricant[J].Lubrication Engineering,2013(8):66-69.
[6]李嘉,陈波水,方建华,等.羟基硅酸盐在水溶液中的摩擦学性能研究[J].中国表面工程,2007,20(2):37-41.LI J,CHEN B S,FANG J H,et al.Study on tribological properties of hydroxyl silicate in aqueous solution[J].China Surface Engineering,2007,20(2):37-41(in Chinese).
[7]SHEILA D.Towards improving wet-adhesion in a metal oxide-polymer coating system[J].Journal of Applied Polymer Science,2006,99(6):3318-3327.
[8]石琛,毛大恒,杨续跃.水基纳米WS2等温模锻润滑剂的制备与应用[J].中南大学学报(自然科学版),2015,46(4):1253-1260.SHI C,MAO D H,YANG X Y.Preparation of water-based nano-WS2 isothermal forging lubricant and its application[J].Journal of Central South University(Science and Technology),2015,46(4):1253-1260(in Chinese).
[9]HU X F,ZHANG S M,YU L G,et al.Preparation of amino clay and evaluation of its tribological properties as a waterbased lubricant additive[J].Tribology,2015(06):24-28.
[10]吴玉程.工程材料基础[M].合肥:合肥工业大学出版社,2014:141-143.WU Y C.Engineering material foundation[M].Hefei:Hefei Industrial University Press,2014:141-143(in Chinese).
[11]赵振铎,邵明志,张召铎,等.金属塑性成形中的摩擦与润滑[M].北京:化学工业出版社,2004:16.ZHAO Z D,SHAO M Z,ZHANG Z D,et al.Friction and lubrication in metal plastic forming[M].Beijing:Chemical Industry Press,2004:16(in Chinese).
[12]薛进进,孙琨,方亮,等.30CrMnSiNi2A钢干滑动摩擦磨损特性研究[J].摩擦学学报,2016(5):614-621.XUE J J,SUN K,Fang L,et al.Friction and wear characteristics of 30CrMnSiNi2A steel at dry sliding condition[J].Tribology,2016(5):614-621(in Chinese).
[13]QIAO Y L,XU B S,MA S N,et al.Tribological properties of Nano/Micron borate additive[J].Materials Protection,2003,36(4):17-19.
[14]王家安.低碳钢冷挤压中的磷化-皂化研究[D].济南:山东大学,2006:17-19.WANG J A.Study on phosphation-saponification in soft steel cold extrusion process[D].Jinan:Shandong University,2006:17-19(in Chinese).
[15]ZHANG D W,YANG H.Analytical and numerical analyses of local loading forming process of T-shape component by using Coulomb,shear and hybrid friction models[J].Tri- bology International,2015(92):259-271.
[16]詹武,闫爱淑,丁晨旭,等.金属摩擦磨损机理剖析[J].天津理工学院学报,2001,17(s1):19-22.ZHAN W,YAN A S,DING C X,et al.Analysis on the principle of metal friction and abrade wear[J].Journal of Tianjin Institute of Technology,2001,17(s1):19-22(in Chinese).
[17]STACHOWIAK G B,STACHOWIAK G W.The effects of particle characteristics on three-body abrasive wear[J].Wear,2001,249(3-4):201-207.
[18]乔玉林,梁志杰,孙晓峰,等.热轧钢/热轧钢摩擦副干摩擦高温摩擦行为的研究[J].金属热处理,2006,31(1):30-32.QIAO Y L,LIANG Z J,SUN X F,et al.The high temperature tribological behaviors of hot rolling steel/steel pairs at dry friction[J].Heat Treatment of Metals,2006,31(1):30-32(in Chinese).
[19]SAYEM A A,RAHMAN M M,MAHDY M R C,et al.Negative refraction with superior transmission in graphenehexagonal boron nitride(hBN)multilayer hyper crystal[J].Scientific Reports,2016(6):25442.
[20]CONTE M,IGARTUA A.Study of PTFE composites tribological behavior[J].Wear,2012,296(1-2):568-574.
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