在MD W-02高速往复摩擦磨损试验机上,通过设置不同参数的滑动干摩擦实验,研究了载荷、滑动速度和时间对时效态ZK61镁合金磨损性能的影响,并绘制了磨损机制转变图.采用扫描电子显微镜(SEM)对磨损试样表面形貌进行了分析,结果表明,当滑动速度(0．12 m/s)一定时,ZK61镁合金的磨损量随着载荷和时间的增加而增加,载荷愈大,磨损愈严重,在120 N、60 min时发生轻微磨损向严重磨损的转变.当滑动时间(20 min)一定时,ZK61镁合金的磨损形式随着滑动速度和载荷的增大而发生变化.当滑动速度(0．12 m/s)较小时,在不同载荷(50~150 N)下均表现为轻微磨损；当滑动速度为0．24 m/s,载荷超过100 N后磨损进入严重磨损阶段；当滑动速度(0．36 m/s)较大时,均表现为严重磨损.
The effect of the load,sliding speed and time on the wear behavior of the ageing ZK6 1 magnesium al-loy was investigated by setting different parameters in this paper.The wear tests were carried out using the MDW-02 high speed reciprocating friction and wear testing machine.Microstructures of worn surfaces were characterized by scanning electron microscope (SEM)and wear mechanism map of the studied alloy was pro-posed.The results show that,wear mass of ZK6 1 magnesium alloy both increase with wear time and applied load under the conditions of a sliding speed of 0.12 m/s,and the transformation of mild wear to severe wear is in 120 N and 60 min.Moreover,the wear mechanism of ZK61 magnesium alloy changes with the increase of the applied load and sliding velocity under the conditions of a fixed wear time 20 min.Low sliding velocities led to mild wear regardless of the load used.Intermediate speeds the main mechanism changed from mild wear to se-vere wear at the applied load exceeded 100 N.At high speeds led to severe wear mechanism under the all applied load.
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