初始表面粗糙度对沟槽织构摩擦性能的影响
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摘要
目的探究初始表面粗糙度大小对激光沟槽织构化表面摩擦性能的影响规律。方法采用脉冲光纤激光器在不同粗糙度的45#钢试样表面制备具有不同深度、规则排列的沟槽织构,利用摩擦磨损试验机进行销-盘式往复摩擦试验,研究初始表面粗糙度对沟槽织构化表面摩擦系数的影响规律,以及不同初始表面粗糙度条件下,激光沟槽织构化表面的摩擦学行为。结果沟槽织构能够有效降低表面的摩擦系数,初始表面粗糙度、载荷和速度的大小对沟槽织构的润滑减摩性能有较大影响。在较低的载荷下,沟槽织构能有效提高表面的流体动压润滑效应;在较高的载荷下,沟槽织构能够有效改善表面的边界润滑性能。存在最优初始表面粗糙度,使得摩擦系数达到最小,初始表面粗糙度最优值的大小应根据载荷和速度大小来确定。结论根据摩擦副表面的载荷和速度工况条件,合理优化初始表面粗糙度能使沟槽织构获得较为理想的润滑减摩效果。
The work aims to investigate the influence laws of initial roughness on the tribological properties of laser mi-cro-groove textured surfaces. The regularly arranged micro-grooves were fabricated on the surface of 45# steel specimens withdifferent roughness by pulse fiber laser. The pin-to-disc reciprocating test was carried out by friction and wear tester to study theinfluence of initial roughness on the friction coefficient of micro-groove textured surface and the tribological behavior of lasermicro-groove textured surface under different initial roughness. The friction coefficient could be significantly reduced by groovetexture. The initial roughness, load and sliding velocity had significant effect on the tribological properties of groove texture.Hydrodynamic lubrication could be significantly improved by groove texture under the lower load, and boundary lubricationcould be effectively improved by groove texture at higher load. There was the optimal initial roughness to minimize the frictioncoefficient. The optimal value of initial surface roughness could be determined according to load and sliding speed. The idealperformance of friction reduction of the textured surfaces can be obtained by optimizing the initial surface roughness accordingto the load and speed.
The work aims to investigate the influence laws of initial roughness on the tribological properties of laser mi-cro-groove textured surfaces. The regularly arranged micro-grooves were fabricated on the surface of 45# steel specimens withdifferent roughness by pulse fiber laser. The pin-to-disc reciprocating test was carried out by friction and wear tester to study theinfluence of initial roughness on the friction coefficient of micro-groove textured surface and the tribological behavior of lasermicro-groove textured surface under different initial roughness. The friction coefficient could be significantly reduced by groovetexture. The initial roughness, load and sliding velocity had significant effect on the tribological properties of groove texture.Hydrodynamic lubrication could be significantly improved by groove texture under the lower load, and boundary lubricationcould be effectively improved by groove texture at higher load. There was the optimal initial roughness to minimize the frictioncoefficient. The optimal value of initial surface roughness could be determined according to load and sliding speed. The idealperformance of friction reduction of the textured surfaces can be obtained by optimizing the initial surface roughness accordingto the load and speed.
引文
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[2]SUH M S,CHAE Y H,KIM S S,et al.Effect of geometrical parameters in micro-grooved crosshatch pattern under lubricated sliding friction[J].Tribology international,2010,43:1508-1517.
[3]于如飞,陈渭.表面织构化在工业摩擦学领域的研究现状与展望[J].机械工程学报,2017,53(3):100-110.YU Ru-fei,CHEN Wei.Research progress and prospect of surface texturing in industrial tribology[J].Journal of mechanical engineering,2017,53(3):100-110.
[4]BLATTER A,MAILAT M,PIMENIV M,et al.Lubricated sliding performance of laser-pattered sapphire[J].Wear,1999,232:226-230.
[5]SHI X,NI T.Effects of groove textures on fully lubricated sliding with cavitation[J].Tribology international,2011,44:2022-2028.
[6]FU Yong-hong,JI Jing-hu,BI Qin-sheng.Hydrodynamic lubrication of conformal contacting surfaces with parabolic grooves[J].Journal of tribology,2012,134:11701-11709.
[7]YUAN Si-huan,HUANG Wei,WANG Xiao-lei.Orientation effects of micro-grooves on sliding surfaces[J].Tribology international,2011,44:1047-1054.
[8]KHALLADI A,ELLEUCH K.Effect of surface topography with different groove angles on tribological behavior of the wheel/rail contact using alternative machine[J].Friction,2016,4(3):238-248.
[9]陈平,项欣,李俊玲,等.沟槽型织构摩擦学性能的数值模拟与实验研究[J].材料工程,2016,44(6):31-37.CHEN Ping,XIANG Xin,LI Jun-ling,et al.Experimental and numerical investigation on tribological performance of grooved texture[J].Journal of materials engineering,2016,44(6):31-37.
[10]OGAWA H,SASAKI S,KORENAGA A,et al.Effects of surface texture size on the tribological properties of slideways[J].Proc IMechE Part J:Journal of engineering tribology,2010,224:885-890.
[11]徐鹏飞,周飞,王谦之,等.网纹型表面微结构对Ti-6Al-4V水润滑摩擦学特性的影响[J].摩擦学学报,2012,32(4):377-383.XU Peng-fei,ZHOU Fei,WANG Qian-zhi,et al.Influence of meshwork pattern grooves on the tribological characteristics of Ti-6Al-4V alloy on water lubrication[J].Tribology,2012,32(4):377-383.
[12]阳江舟,莫继良,盖小红,等.制动盘材料表面织构化处理对摩擦噪声影响的试验分析[J].摩擦学学报,2015,35(3):322-327.YANG Jiang-zhou,MO Ji-liang,GAI Xiao-hong,et al.Experimental study on the effects of groove-textured surface on the friction-induced noise of brake disc materials[J].Tribology,2015,35(3):322-327.
[13]MOHAMAD S A,LU X Q,ZHENG Q.Effect of cylinder liner oil grooves shape on two-stroke marine diesel engine's piston ring friction force[J].Advances in mechanical engineering,2015,7(2):837960.
[14]马国亮,姜亮,黄巍,等.不同粗糙度条件下硅橡胶表面织构润滑特性的研究[J].西安交通大学学报,2010,44(9):87-92.MA Guo-liang,JIANG Liang,HUANG W,et al.Lubrication properties of textured polydimethylsiloxane surfaces with different roughness[J].Journal of Xi'an Jiaotong Univesity,2010,44(9):87-92.