镍基高温合金磨削表面工艺性能试验研究
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摘要
为了探究镍基高温合金的磨削表面工艺性能,采用单因素试验的方法,分别进行镍基高温合金单晶DD5和多晶GH4169的平面槽磨削试验,得到砂轮线速度、磨削深度和进给速度对其表面质量的影响规律,并对磨削亚表面微观组织和磨屑形貌进行观察.结果表明:随着砂轮线速度的增大,表面粗糙度Ra不断减小;随着磨削深度和进给速度的增大,表面粗糙度Ra不断增大.在相同工艺参数下,多晶GH4169更容易加工,可磨削性能更好.随着砂轮线速度的增大,磨削亚表面出现塑性变形层且塑性变形作用减弱.磨屑主要有锯齿状和崩碎状等,其中锯齿状磨屑居多.
Plane slot grinding single factor experiments of nickel-based single crystal superalloy DD5 and polycrystalline superalloy GH4169 were conducted in order to explore the grinding surface processing property of nickel-based superalloy.The influence of grinding wheel linear speed,grinding depth and feed rate on grinding surface quality was concluded.The grinding subsurface microstructure and grinding debris morphology were observed.The results show that:with the increase of grinding wheel linear speed,the grinding surface roughness Ra decreases;with the increase of grinding depth and feed rate,the grinding surface roughness Ra increases.With the same process parameters,the GH4169 is easier to machine and has better grinding performance than the DD5.With the increase of grinding wheel linear speed,a plastic deformation layer appears on the grinding subsurface and plastic deformation action is weakened gradually.The grinding debris mainly presents the serrated and crumbled features,and the serrated debris is dominant.
Plane slot grinding single factor experiments of nickel-based single crystal superalloy DD5 and polycrystalline superalloy GH4169 were conducted in order to explore the grinding surface processing property of nickel-based superalloy.The influence of grinding wheel linear speed,grinding depth and feed rate on grinding surface quality was concluded.The grinding subsurface microstructure and grinding debris morphology were observed.The results show that:with the increase of grinding wheel linear speed,the grinding surface roughness Ra decreases;with the increase of grinding depth and feed rate,the grinding surface roughness Ra increases.With the same process parameters,the GH4169 is easier to machine and has better grinding performance than the DD5.With the increase of grinding wheel linear speed,a plastic deformation layer appears on the grinding subsurface and plastic deformation action is weakened gradually.The grinding debris mainly presents the serrated and crumbled features,and the serrated debris is dominant.
引文
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[2]周云光,巩亚东,温雪龙,等.高温合金K445微磨削表面质量实验研究[J].东北大学学报(自然科学版),2016,37(2):218-221.(Zhou Yun-guang,Gong Ya-dong,Wen Xue-long,et al.Experimental study on surface quality in micro-grinding of superalloy K445[J].Journal of Northeastern University(Natural Science),2016,37(2):218-221.)
[3]黄新春,张定华,姚倡锋,等.镍基高温合金GH4169磨削参数对表面完整性影响[J].航空动力学报,2013,28(3):621-628.(Huang Xin-chun,Zhang Ding-hua,Yao Chang-feng,et al.Effects of grinding parameters on surface integrity of GH4169nickel-based superalloy[J].Journal of Aerospace Power,2013,28(3):621-628.)
[4]杜随更,姜哲,张定华,等.GH4169DA磨削表面变质层软化机理[J].航空学报,2014,35(5):1446-1451.(Du Sui-geng,Jiang Zhe,Zhang Ding-hua,et al.Softening mechanism of grinding surface metamorphic layer of GH4169DA[J].Acta Aeronautica et Astronautica Sinica,2014,35(5):1446-1451.)
[5]Zhou Y G,Gong Y D,Cai M,et al.Study on surface quality and subsurface recrystallization of nickel-based single-crystal superalloy in micro-grinding[J].International Journal of Advanced Manufacturing Technology,2017,90(6):1749-1768.
[6]Gong Y D,Zhou Y G,Wen X L,et al.Experimental study on micro-grinding force and subsurface microstructure of nickelbased single crystal superalloy in micro grinding[J].Journal of Mechanical Science and Technology,2017,31(7):3397-3410.
[7]Aspinwall D K,Soo S L,Curtis D T,et al.Profiled superabrasive grinding wheels for the machining of a nickel based superalloy[J].CIRP Annals-Manufacturing Technology,2007,56(1):335-338.
[8]Yao C F,Jin Q C,Huang X C,et al.Research on surface integrity of grinding Inconel 718[J].International Journal of Advanced Manufacturing Technology,2013,65(7):1019-1030.
[9]Zhao Z C,Fu Y C,Xu J H,et al.An investigation on highefficiency profile grinding of directional solidified nickel-based superalloys DZ125 with electroplated CBN wheel[J].International Journal of Advanced Manufacturing Technology,2016,83(1):1-11.
[10]Jin D,Liu Z Q,Yi W,et al.Influence of cutting speed on surface integrity for powder metallurgy nickel-based superalloy FGH95[J].International Journal of Advanced Manufacturing Technology,2011,56(6):553-559.
[11]Chen Z Z,Xu J H,Ding W F,et al.Grinding temperature during high-efficiency grinding Inconel 718 using porous CBNwheel with multilayer defined grain distribution[J].International Journal of Advanced Manufacturing Technology,2015,77(1):165-172.