电塑性辅助铣削GH4169高温合金的实验研究  

Experimental study on electroplasticity assisted milling of GH4169 superalloy

作　　者：黄波涛 高延峰[1] HUANG Bo-tao;GAO Yan-feng(School of Aeronautic Manufacturing Engineering,Nanchang Hangkong University,Nanchang 330063,China)

机构地区：[1]南昌航空大学航空制造工程学院,江西南昌330063

出　　处：《塑性工程学报》2020年第12期82-87,共6页Journal of Plasticity Engineering

基　　金：航空科学基金资助项目(2018ZE56013)。

摘　　要：针对GH4169高温合金切削加工过程中切削力大、切削温度高以及刀具磨损严重等问题,通过电塑性辅助铣削实验研究了脉冲电流对平均切削力、切削温度以及刀具磨损的影响规律。结果表明,脉冲电流可以有效降低铣削过程中的平均切削力,其中切削深度为0.2~0.4 mm时Z轴方向的平均切削力变化较为显著,当电流密度为4.08 A·mm^-2时,Z轴方向的平均切削力相比不通电状态下降低29.2%;一定的电流密度下,脉冲电流能有效降低铣削过程中的切削温度;脉冲电流能有效缓解刀具磨损的速度,当电流密度从4.08 A·mm^-2增加到17.13 A·mm^-2时,与不通电相比,后刀面平均磨损宽度分别减小15.5%和38.1%。Aiming at the problems of high cutting force,high cutting temperature and severe tool wear during the cutting process of GH4169 superalloy,electroplastic assisted milling experiments were performed to study the influence law of pulse current on average cutting force,cutting temperature and tool wear.The results show that pulse current can effectively reduce the average cutting force in the milling process,and the average cutting force along Z-axis direction changes significantly when the cutting depth is 0.2-0.4 mm.When the current density is 4.08 A·mm^-2,the average cutting force along Z-axis direction is decreased by 29.2%compared with that without current.At a certain current density,the pulse current can effectively reduce the cutting temperature in the milling process;pulse current can effectively alleviate the speed of tool wear,when the current density increases from 4.08 A·mm^-2 to 17.13 A·mm^-2,the average wear width of rear tool surface is decreased by 15.5%and 38.1%respectively compared with that without current.

关 键 词：镍基高温合金 脉冲电流 切削力 切削温度 刀具磨损 

分 类 号：TG506.7[金属学及工艺—金属切削加工及机床]