基体表面粗糙度对涂层表面形貌影响的数值模拟
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摘要
针对基体表面粗糙度对涂层的撞击、铺展和凝固的影响,建立熔滴撞击基材的三维几何模型,并构造层片沉积形成过程模型;在上述层片模型基础上,分析不同的基体表面粗糙度对涂层表面形貌的影响规律,并将所得数据导入Matlab工具,模拟在不同的基体表面粗糙度条件下表面沉积凝固后层片的三维表面形貌,并对其进行数据分析,通过轮廓算术平均偏差Ra、微观不平度十点平均高度Rz和轮廓最大高度Ry分析不同基体表面粗糙度下层片表面形貌的质量.模拟结果表明,在适当的范围内,随着基材表面粗糙度的增加,层片的铺展范围会越来越大,且厚度越均匀,表面形貌逐渐变好.
Aiming at the problem of the surface roughness of substrate on the coating which is impacted,spreaded and solidified,three-dimensional model of droplet jetting substrate was built,and the processing model of the layered deposition was established.Based on this,the influence of different surface roughness of substrate on the surface morphology of coating was analyzed,the simulation data was imported into the software MATLAB,three-dimensional surface topography of the layered surface after deposition and solidifcation was simulated under thecondition of different surface roughness.Based on the analysis of simulation data,the quality of the coating surface topography is described according to profile arithmetic average error Ra,tenpoint height of irregularities Rzand maxium altitude Ryvalue of contour under the condition of different surface roughness of substrate.The simulation results show that with the increasing of the suface roughness,the spreading areas of layer gradually become large,the thickness is more uniform and the surface morphology becomes better within an appropriate range.
Aiming at the problem of the surface roughness of substrate on the coating which is impacted,spreaded and solidified,three-dimensional model of droplet jetting substrate was built,and the processing model of the layered deposition was established.Based on this,the influence of different surface roughness of substrate on the surface morphology of coating was analyzed,the simulation data was imported into the software MATLAB,three-dimensional surface topography of the layered surface after deposition and solidifcation was simulated under thecondition of different surface roughness.Based on the analysis of simulation data,the quality of the coating surface topography is described according to profile arithmetic average error Ra,tenpoint height of irregularities Rzand maxium altitude Ryvalue of contour under the condition of different surface roughness of substrate.The simulation results show that with the increasing of the suface roughness,the spreading areas of layer gradually become large,the thickness is more uniform and the surface morphology becomes better within an appropriate range.
引文
[1]陈丽梅,李强.离子喷涂技术现状及发展[J].热处理技术与装备,2006,27(1):1-5.CHEN Limei,LI Qiang.The present status and development of plasma spraying technology[J].Heat Treatment Technology and Equipment,2006,27(1):1-5.
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[11]郑振环,李强.不同基底上等离子喷涂钼层片形成过程的三维模拟[J].机械工程材料,2015,39(12):75-79.ZHENG Zhenhuan,LI Qiang.Three-dimensional simulation of plasma sprayed molybdenum splat formation on different substrates[J].Materials for Mechanical Engineering,2015,39(12):75-79.
[12]李长久李京龙.等离子喷涂熔滴扁平过程数值模拟[J].航天制造技术,1999,13(5):57-62.LI Changjiu,LI Jinglong.Numerical simulations of droplet flattening in plasma spraying[J].Aeronautical Manufacturing Technology,1999,13(5):57-62.
[13]马壮,曹素红,王富耻.基体表面粗糙度对HVOF喷涂WC-Co粒子变形的影响[J].北京理工大学学报,2006,26(4):373-376.MA Zhuang,CAO Suhong,WANG Fuchi.Effect of substrate surface roughness on the splat formation in the HVOF spraying of WC-Co[J].Transactions of Beijing Institute of Technology,2006,26(4):373-376.
[14]张家宽.熔融液滴撞击金属粉末表面的铺展和凝固模型[D].南京:南京航空航天大学,2008:18-20.ZHANG Jiakuan.Molten metal droplet-powder impact interaction:Model for spreading and solidification[D].Nanjing:Nanjing University of Aeronautics and Astronautics,2008:18-20.
[15]杨晖,潘少明.基体表面粗糙度对涂层结合强度的影响[J].金属铸锻焊技术,2008,37(15):118-121.YANG Hui,PAN Shaoming.Effect of substrate surface roughness on bond strength of coatings[J]Casting Forging Welding,2008,37(15):118-121.
[16]LI Hejun,WANG Pengyun,QI Lehua.3Dnumerical simulation of successive deposition of uniform molten Al droplets a moving substrate and experimental validation[J].Computational Materials Science,2012(12):291-301.
[2]路学成,阎殿然,黄勇,等.等离子喷涂结构涂层研究[J].热处理,2007,22(1):12-18.LU Xuecheng,YAN Dianran,HUANG Yong,et al.Research on plasma sprayed structural coatings[J].Heat Treatment,2007,22(1):12-18.
[3]唐家伟,谢淑兰,潘鑫.等离子喷涂涂层的研究进展[J].热喷涂技术,2011,3(2):35-39.TANG Jiawei,XIE Shulan,PAN Xin.Research development of plasma spray coating[J].Thernal Spray Technology,2011,3(2):35-39.
[4]PASSANDIDEH Al Avi S,FARD M,MOSTAGHIMI J.Simulation of semi-molten particle impacts including heat transfer and phase change[J].Journal of Thermal Spray Technology,2012,21(6):1278-1293.
[5]KUMAR A,GU S.Modelling impingement of hollow metal droplets onto a flat surface[J].International Journal of Heat and Fluid Flow,2012,37:189-195.
[6]范群波,王鲁,王富耻.等离子喷涂熔融颗粒撞击基体过程的数值模拟[J].机械工程材料,2002,26(7):19-21.FAN Qunbo,WANG Lu,WANG Fuchi.Finite element numerical simulation of molten particles impacting onto a solid substrate in plasma spraying process[J].Materials for Mechanical Eenineering,2002,26(7):19-21.
[7]韩占忠,王敬,兰小平.FLUENT流体工程仿真计算实例与应用[M].北京:北京理工大学出版社,2004:14-20.HAN Zhanzhong,WANG Jing,LAN Xiaoping.Example and application of fluent fluid engineering simulation[M].Beijing:Beijing Institute of Technology Press,2004:14-20.
[8]崔长生.等离子喷涂涂层形成过程数值模拟[D].福州:福州大学,2011:15-20.CUI Changsheng.Three-dimensional numerical simulation of coating formating in plasma spraying[D].Fuzhou:Fuzhou University,2011:15-20.
[9]杨焜,刘敏,邓畅光,等.环境压强对低压等离子喷涂熔滴沉积行为及涂层性能的影响[J].中国有色金属学报,2014,24(3):708-717.YANG Kun,LIU Min,DENG Changguang,et al.Effect of ambient pressure on splat formation process and coating properties in low pressure plasma spraying[J].The Chinese Journal of Nonferrous Metals,2014,24(3):708-717.
[10]谈明高,刘厚林,吴贤芳,等.粗糙度对离心泵性能数值预测的影响[J].中国农村水利水电,2011(2):131-134.TAN Minggao,LIU Houlin,WU Xianfang,et al.The effect of roughness on the numerical prediction of the characteristics of centrifugal Pumps[J].China Rural Water and Hydropower,2011(2):131-134.
[11]郑振环,李强.不同基底上等离子喷涂钼层片形成过程的三维模拟[J].机械工程材料,2015,39(12):75-79.ZHENG Zhenhuan,LI Qiang.Three-dimensional simulation of plasma sprayed molybdenum splat formation on different substrates[J].Materials for Mechanical Engineering,2015,39(12):75-79.
[12]李长久李京龙.等离子喷涂熔滴扁平过程数值模拟[J].航天制造技术,1999,13(5):57-62.LI Changjiu,LI Jinglong.Numerical simulations of droplet flattening in plasma spraying[J].Aeronautical Manufacturing Technology,1999,13(5):57-62.
[13]马壮,曹素红,王富耻.基体表面粗糙度对HVOF喷涂WC-Co粒子变形的影响[J].北京理工大学学报,2006,26(4):373-376.MA Zhuang,CAO Suhong,WANG Fuchi.Effect of substrate surface roughness on the splat formation in the HVOF spraying of WC-Co[J].Transactions of Beijing Institute of Technology,2006,26(4):373-376.
[14]张家宽.熔融液滴撞击金属粉末表面的铺展和凝固模型[D].南京:南京航空航天大学,2008:18-20.ZHANG Jiakuan.Molten metal droplet-powder impact interaction:Model for spreading and solidification[D].Nanjing:Nanjing University of Aeronautics and Astronautics,2008:18-20.
[15]杨晖,潘少明.基体表面粗糙度对涂层结合强度的影响[J].金属铸锻焊技术,2008,37(15):118-121.YANG Hui,PAN Shaoming.Effect of substrate surface roughness on bond strength of coatings[J]Casting Forging Welding,2008,37(15):118-121.
[16]LI Hejun,WANG Pengyun,QI Lehua.3Dnumerical simulation of successive deposition of uniform molten Al droplets a moving substrate and experimental validation[J].Computational Materials Science,2012(12):291-301.