摘要
以球-面接触方式,在0.6 mm振幅下,研究微细电火花线切割加工表面在不同载荷和不同频率下的往复滑动干摩擦磨损行为,并探讨其磨损机理。结果表明,微细电火花线切割加工的模具钢M42表面,随着载荷的增加,摩擦过程转变为三体摩擦,降低了摩擦因数;随着频率的增加,由于温升形成的氧化膜降低了微凸体接触界面的抗剪强度,从而使摩擦因数降低;磨损体积随着载荷和频率的增大均呈增大的趋势,磨痕呈现为典型的粘着磨损和氧化磨损机制。
The reciprocating sliding tribological behavior of the micro wire electrical discharge machining（micro-WEDM） surface was investigated under dry friction and wear conditions by using the ball-on-flat contact model with 0.6mm amplitude.The influences of different loads and frequencies on the friction coefficient were analyzed and the wear mechanism was also studied.The results showed that the friction coefficient decreased with the load increasing because of the third body friction,friction coefficient decreased with the frequency increasing because the oxide film formed with temperature rising led to the decrease of shear strength of microtip contact surface.The wear-loss volume of the micro-WEDM surface increased with load and frequency increasing,and the wear scars appeared adhesion and oxidation wear mechanism.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2011年第1期228-232,共5页
Transactions of the Chinese Society for Agricultural Machinery
基金
工业与信息化部基础科研项目(J192007B001)
关键词
微细电火花线切割加工
表面形貌
干摩擦
磨损
摩擦因数
Micro wire electrical discharge machining（micro-WEDM）
Surface topography
Dry friction
Wear
Friction coefficient
