不同切削距离下硬质合金刀具加工GH4169的切削性能研究
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摘要
为探索不同切削距离下硬质合金刀具加工GH4169时的磨损规律、切削力、表面粗糙度,对GH4169材料进行了切削试验。分析了硬质合金刀具磨损的演变过程及刀具磨损对切削力、表面粗糙度的影响。研究结果表明,随着切削距离的增加,前刀面磨损区域逐渐扩大,前刀面磨损形式依次为涂层脱落、沟槽磨损、粘附磨损,后刀面磨损形式主要为涂层脱落及微崩刃。高温合金材料中较多的硬质颗粒,及其较强的粘性是导致前刀面磨损的主要原因。F_x、F_y、F_z的总体变化趋势为随着切削距离的增加先增大后减小,试件表面粗糙度随切削距离的增加先减小再增大后减小,在切削75m时,表面粗糙度最小。
In order to investigate the wear mechanism of cemented carbide tool, cutting force and surface roughness during turning GH4169 under different cutting distances, the cutting experiment of GH4169 material was carried out. The evolution process of tool wear and the influence of tool wear on cutting force and surface roughness were analyzed. The results show that with the increase of cutting distance, the wear area of the rake face is gradually enlarged. The wear pattern of the rake face is coating shedding、groove wear and adhesive wear. The wear form of the flank face is mainly the coating shedding and micro-chipping. More hard particles in the superalloy and their strong viscosity are the main causes of the wear of the rake face. The overall trend of Fx、Fy and Fz is to increase first and then decrease as the cutting distance increases. The surface roughness of the workpiece decreases first and then decreases with the increase of the cutting distance. The surface roughness is minimal when cutting 75 m.
In order to investigate the wear mechanism of cemented carbide tool, cutting force and surface roughness during turning GH4169 under different cutting distances, the cutting experiment of GH4169 material was carried out. The evolution process of tool wear and the influence of tool wear on cutting force and surface roughness were analyzed. The results show that with the increase of cutting distance, the wear area of the rake face is gradually enlarged. The wear pattern of the rake face is coating shedding、groove wear and adhesive wear. The wear form of the flank face is mainly the coating shedding and micro-chipping. More hard particles in the superalloy and their strong viscosity are the main causes of the wear of the rake face. The overall trend of Fx、Fy and Fz is to increase first and then decrease as the cutting distance increases. The surface roughness of the workpiece decreases first and then decreases with the increase of the cutting distance. The surface roughness is minimal when cutting 75 m.
引文
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[2] 程剑兵,庞思勤,王西彬,等.硬质合金刀具车削GH2132高温合金磨损及破损试验[J].北京理工大学学报,2013,33(9):912-915.
[3] 李凯,胡显军.几种牌号刀具对Inconel 625切削性能的对比研究[J].工艺与检测,2016(2):107-110.
[4] 金狂浩,陈康华,祝昌军,等.硬质合金基体对涂层刀具高速切削镍基高温合金切削性能的影响[J].粉末冶金材料科学与工程,2012,17 (4):438-443.
[5] Thakur A,Mohanty A,Gangopadhyay S,et al.Tool Wear and Chip Characteristics during Dry Turning of Inconel 825[J].Procedia Materials Science,2014,5:2169-2177.
[6] 刘维伟,李晓燕,万旭生,等.GH4169高速车削参数对加工表面完整性影响研究[J].机械科学与技术,2013,32(8):1094-1097.
[7] 姚倡锋,陈广超,黄亲,等.TiAlN涂层硬质合金刀具大进给铣削高温合金的加工性能评价[J].哈尔滨理工大学学报,2018,23 (3):123-127.
[8] 乔阳,艾兴,赵军,等.涂层硬质合金刀具铣削粉末冶金镍基高温合金时的失效机理[J].北京工业大学学报,2011,37(1):2-6.
[9] 宋庭科,李嫚,张弘弢.PCBN刀具车削镍基高温合金切削性能研究[J].金刚石与磨料磨具工程,2011,31 (1):71-73.
[10] 杨茂奎,任敬心.加工表面完整性对GH4169高温合金疲劳寿命的影响[J].航空精密制造技术,1996,32(6):28-31.
[11] 王素玉,赵军,艾兴,等.高速切削表面粗糙度理论研究综述[J].机械工程师,2004(10):3-6.
[12] Liu W W,Zhu L J,Shan C W,et al.Effect of cutting parameters on the cutting force in the end milling of GH4169 superalloy[J].The International conference on E-product E-Service and E-Entertainment,2010(6):3756-3759.
[13] 常艳丽.镍基高温合金GH4169的切削力与刀具磨损试验研究[D].哈尔滨:哈尔滨工业大学,2011.