5083铝合金/35CrMo钢线接触切向微动磨损行为

Fretting Wear Behavior of 5083 Aluminum Alloy/35CrMo Steel under Linear Contact

研究钢/铝配副的线接触微动磨损具有重要的理论意义和工程价值,过去对其报道不够。在电磁激振微动磨损试验机上,采用自调节式线接触夹具,对5083铝合金/35Cr Mo钢摩擦副进行线接触式切向微动磨损,研究了其在线接触条件下的切向微动磨损行为。结果表明:在线接触条件下,5083铝合金/35Cr Mo钢的微动运行区域存在部分滑移区、混合区和滑移区;部分滑移区摩擦系数较小,混合区摩擦系数峰值最大;部分滑移区损伤轻微,接触呈不连续特征,混合区和滑移区磨损严重;5083铝合金的磨损体积随着位移幅值的增加而增加,磨痕表层有微裂纹;5083铝合金/35Cr Mo合金钢的磨损机制主要为磨粒磨损和疲劳磨损。

An electromagnetic excited fretting wear test rig equipped with a self-adjustable clamp was performed to evaluate the tangential fretting wear behavior of 5083 aluminum alloy-35 CrMo steel pair under linear contact condition.Results showed that the fretting area of the Al alloy-steel pair under linear contact condition involved three regions:partial slip regime(PSR),mixed fretting regime(MFR) and slip regime(SR).The friction coefficient in the PSR was relatively low,and that in the MFR was the maximum.Besides,slight damage occurred in the PSR which was dominated by discontinuous contact,while severe wear occurred in the MFR and SR.In the meantime,the wear volume of the Al alloy tended to rise with increasing displacement amplitude,and microcracks appeared in its wear scar.Moreover,in terms of the wear mechanisms,the title frictional pair under linear contact was dominated by abrasive wear and fatigue wear.