激光清洗高速列车集电环表面性能评估
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摘要
为了研究激光清洗高速列车集电环锈蚀后对表面显微硬度、表面粗糙度、耐腐蚀性能以及表面化学成分的影响,采用1 064 nm脉冲激光对集电环表面锈蚀进行清洗。利用表面粗糙度仪以及显微硬度仪对清洗前后表面粗糙度与显微硬度进行检测,通过电化学工作站对清洗前后进行抗腐蚀性能检测,使用X射线荧光光谱分析表面化学成分。结果表明,经过激光清洗后表面显微硬度达到210.7 HV,高于基材硬度;清洗后表面粗糙度达到Ra 2.5相比未清洗表面降低68.7%;并且激光清洗处理后集电环表面耐腐蚀性能相较于基材得到增强;经过激光清洗后的集电环表面O元素含量与未清洗表面相比发生下降,O含量为3.840%。
In order to study the effects of laser cleaning on the surface microhardness, surface roughness, corrosion resistance and surface chemical composition of the high-speed train slip ring, a 1 064 nm pulsed laser was used to clean the surface of the collector ring. The surface roughness and microhardness were measured before and after cleaning by surface roughness tester and microhardness tester. The corrosion resistance was measured before and after cleaning by an electrochemical workstation, and the surface chemical composition was analyzed by X-ray fluorescence spectroscopy. The results show that the surface microhardness after laser cleaning reaches 210.7 HV, which is higher than the hardness of the substrate. The surface roughness after cleaning reaches Ra 2.5, which is 68.7% lower than that of the uncleaned surface. Moreover, the surface corrosion resistance of the slip ring after laser cleaning is enhanced compared with the substrate. The oxygen content of the slip ring after laser cleaning is decreased compared with the uncleaned surface, and the oxygen content is 3.840%.
In order to study the effects of laser cleaning on the surface microhardness, surface roughness, corrosion resistance and surface chemical composition of the high-speed train slip ring, a 1 064 nm pulsed laser was used to clean the surface of the collector ring. The surface roughness and microhardness were measured before and after cleaning by surface roughness tester and microhardness tester. The corrosion resistance was measured before and after cleaning by an electrochemical workstation, and the surface chemical composition was analyzed by X-ray fluorescence spectroscopy. The results show that the surface microhardness after laser cleaning reaches 210.7 HV, which is higher than the hardness of the substrate. The surface roughness after cleaning reaches Ra 2.5, which is 68.7% lower than that of the uncleaned surface. Moreover, the surface corrosion resistance of the slip ring after laser cleaning is enhanced compared with the substrate. The oxygen content of the slip ring after laser cleaning is decreased compared with the uncleaned surface, and the oxygen content is 3.840%.
引文
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[2] LIU BORU,ZHAO XIAOMING,WANG ZHICHENG,et al.Overhaul and safety risk prevention of EMU gearboxes[J].Railway Quality Control,2014,42(7):29-32.刘博如,赵晓明,王志成,等.动车组齿轮箱检修与安全风险防范[J].铁道技术监督,2014,42(7):29-32.
[3] QIN SHILIANG.Research on overhaul technology of CRH_(2A) EMU integrated gearbox[J].Locomotive & Rolling Stock Technology,2011(4):42-44.秦世亮.CRH_(2A)型动车组整体式齿轮箱检修工艺研究[J].机车车辆工,2011(4):42-44.
[4] LIU YING,CHEN WEIJIN,LI FENG,et al.Comparative test of carbon brush performance for high-speed EMU gearbox grounding device[J].Locomotive & Rolling Stock Technology,2011(6):37-38.刘莹,陈维金,李枫,等.高速动车组齿轮箱接地装置用碳刷性能对比试验[J].机车车辆工艺,2011(6):37-38.
[5] ZHANG XIAN,LI XIAOYA,CHEN KANG.Discussion on verification and modification of gearbox cleaning and repairing equipment for EMU bogies[J].Rolling Stock,2010,48(9):35-38.张宪,李笑亚,陈康.浅谈动车组转向架齿轮箱清洗检修设备验证与改造[J].铁道车辆,2010,48(9):35-38.
[6] LANG WENMIN.Maintenance technology and safety specification of EMU gearbox[J].Science & Technology Vision,2016(24):90-90.郎雯敏.动车组齿轮箱的检修技术及安全防范[J].科学视界,2016(24):90-90.
[7] SONG FENG,LIU SHUJING,NIU KONGZHEN,et al.Principle and application research on laser cleaning[J].Cleaning World,2005,21(1):1-6.宋峰,刘淑静,牛孔贞,等.激光清洗原理与应用研究[J].清洗世界,2005,21(1):1-6.
[8] LEE H,CHO N,LEE J.Study on surface properties of gilt-bronze artifacts,after Nd:YAG laser cleaning[J].Applied Surface Science,2013,284:235-241.
[9] TONG YANQUN.Study on mechanism and application fundamentals of laser removal of metal oxides[D].Zhenjiang:Jiangsu University,2014.佟艳群.激光去除金属氧化物的机理与应用基础研究[D].镇江:江苏大学,2014.
[10] XIE YUFEI,LIU HONGEI,HU YONGXIANG.Determining process parameters for laser derusting of ship steel plates[J].Chinese Journal of lasers,2016(4):109-116.解宇飞,刘洪伟,胡永祥.船舶板材激光除锈工艺参数确定方法研究[J].中国激光,2016(4):109-116.
[11] EARNS A,FISCHER C,WATKINS K G,et al.Laser removal of oxides from a copper substrate using Q-switched Nd:YAG radiation at 1 064 nm,532 nm and 266 nm[J].Applied Surface Science,1998,(127-129):773-780.
[12] YU HONGBIN,WANG CHUNMING,WANG JUN,et al.Research on the laser de-rusting of carbon steel surface[J].Applied Laser,2014(4):310-314.俞鸿斌,王春明,王军,等.碳钢表面激光除锈研究[J].应用激光,2014(4):310-314.
[13] WANG Z,ZENG X,HUANG W.Parameters and surface performance of laser removal of rust layer on A3 steel[J].Surface & Coatings Technology,2003,166(1):10-16.
[14] ZHANG QINGLAI,QIAN YANG,AN ZHIBIN,et al.Study on electrochemical corrosion of magnesium alloys by laser shock processing in NaCl solution[J].Chinese Journal of lasers,2014,41(9):76-82.张青来,钱阳,安志斌,等.基于激光冲击的镁合金在NaCl溶液中电化学腐蚀的研究[J].中国激光,2014,41(9):76-82.
[15] XIE CHUNYANG,KONG DEJUN.Effect of laser quenching on salt spray corrosion and electrochemical corrosion of boronized layer on Cr12MoV steel[J].Journal of central south university:Science and technology,2016,47(8):2614-2620.谢春洋,孔德军.激光淬火对Cr12MoV钢渗硼层盐雾腐蚀和电化学腐蚀的影响[J].中南大学学报:自然科学版,2016,47(8):2614-2620.
[16] MORENO-SUáRE A I,AGER F J,RODRíQUEZ-SEGOVIA C,et al.Feasibility of different cleaning methods for silver-copper alloys by X-ray fluorescence:Application to ancient Greek silver coins[J].Spectrochimica Acta Part B:Atomic Spectroscopy,2016(116):85-91.