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TC4合金微动磨损过渡区摩擦行为
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Friction Behavior of TC4 Alloy on Fretting Wear Transition Zone
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    摘要:

    为研究TC4合金微动磨损过渡区摩擦行为特点,采用SRV-IV微动摩擦磨损试验机,对球/平面接触的GCr15钢球/合金TC4摩擦副在100 N法向载荷下进行微动磨损试验,得到TC4合金微动磨损过渡区的范围,分析不同状态下摩擦因数演变及磨痕表面形貌特点,研究磨损机制的变化。结果表明:微动状态下,摩擦因数在磨合阶段波动剧烈,达到稳定磨损阶段后趋于稳定,且稳定状态下的摩擦因数随着位移幅值的增加而增加;往复滑动状态下,不同位移幅值下的摩擦因数曲线近乎重合且波动剧烈;微动磨损过渡区的摩擦因数变化处于2种状态的转变阶段。微动状态下,磨痕表面轮廓线粗糙,损伤轻微,磨损机制以黏着磨损和疲劳剥层为主;往复滑动状态下,轮廓线更光滑且损伤严重,磨损机制以磨粒磨损及塑性变形为主;微动磨损过渡区轮廓线由粗糙变为光滑,磨损深度及宽度突增,磨损机制由黏着磨损转变为磨粒磨损。

    Abstract:

    In order to study the friction behavior of TC4 alloy on fretting wear transition zone,the fretting wear test of GCr15 steel ball and alloy TC4 friction pairs in ballplane contact was carried out under 100 N normal load by using SRVIV fretting friction and wear tester.The range of fretting wear transition zone of TC4 alloy was obtained,the evolution of friction coefficient and the surface morphology of wear mark under different states were analyzed,and the change of wear 〖JP3〗mechanism was studied.The results show that in the fretting state,the friction coefficient fluctuates violently in the runningin〖JP〗 stage and tends to be stable after reaching the stable wear stage,and the friction coefficient in the stable state is increased with the increase of the displacement amplitude.In the reciprocating sliding state,the friction coefficient curves under different displacement amplitudes almost coincides and fluctuates violently.In the fretting wear transition zone,the change of the friction coefficient is in the transition stage of two states.In the fretting state,the profile of the wear mark is rough,the damage is slight,and the wear mechanism is mainly adhesive wear and fatigue stripping.In the reciprocating sliding state,the profile of the wear mark is smoother and the damage is serious,and the wear mechanism is mainly abrasive wear and plastic deformation.The profile of fretting wear transition zone changes from rough to smooth,the wear depth and width are suddenly increased,and the wear mechanism changes from adhesive wear to abrasive wear.

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俞树荣,邵晨,何燕妮,景鹏飞. TC4合金微动磨损过渡区摩擦行为[J].润滑与密封,2019,44(12):24-30.
. Friction Behavior of TC4 Alloy on Fretting Wear Transition Zone[J]. Lubrication Engineering,2019,44(12):24-30.

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  • 在线发布日期: 2020-03-19
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