冲击滑动耦合作用下的材料磨损

研制了一种新型磨损试验机，用于研究材料在冲击滑动耦合作用下的磨损特性。试验机由电磁激振器激励悬臂梁产生法向冲击，电机带动旋转轴产生切向滑动。各试验参数（冲击力幅值、冲击力频率及滑动速度）调节方便可靠，最大冲击力、冲击频率及滑动速度分别为100Hz，200N及4．52m／s。本文使用该试验机对材料在冲击滑动耦合作用下的磨损特性进行了研究，并利用称重法、二维轮廓测量及电子扫描显微镜评估了材料磨损。结果表明：在相同试验条件下，试验的重现性较好，数据重复性误差小于7％。此外，硬度高的钛合金试件比硬度低的铝青铜试件磨损严重。

IMPACT-SLIDING WEAR OF MATERIALS

A simple impact-sliding wear test rig is designed for studying the wear behavior between solid materials on a repetitive normal impact accompanied with the tangential sliding.The test rig consists of a cantilever beam forced by the dynamoelectric vibration exciter and a rotational shaft driven by a spindle.It has a widely adjustable range of testing parameters, including the impact frequency, the impact load and the sliding velocity.The avail-able maximum impact frequency, impact load and sliding velocity are 100 Hz, 200 N and 4.52 m/s, respectively.To evaluate the capability of the test rig, tests are carried out and the impact load is measured.Results show that the test rig has the good repeatability under the same test conditions and the repeatable error is less than 7%.Furthermore, non-destructive examination results by the mass loss method, two-dimensional profilometry and the scanning electron microscopy (SEM) show that the test rig can meet the demands for the impact-sliding wear.