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为探讨MoS2固体润滑涂层在抗扭动微动磨损中应用的可行性,对MoS2涂层在扭动微动下摩擦力学性能进行有限元分析,研究扭转角位移幅值、法向载荷、摩擦因数等对MoS2涂层接触表面力学行为的影响,并与基体材料扭动微动力学行为进行比较。分析结果显示:MoS2涂层扭动微动运行区域的改变消除了混合区裂纹萌生与扩展所产生的损伤;MoS2涂层在部分滑移区和滑移区,其表面塑性应变虽比基体大,但明显较小的摩擦剪应力,在部分滑移区不足以启动MoS2涂层晶体的滑移,在滑移区对塑性流动层的剪切作用不够,因此MoS2涂层表面磨损较轻微,即MoS2能有效发挥抗扭动微动磨损作用。
In order to investigate the feasibility of applying MoS2 solid lubricant coating to fretting fretting wear, finite element analysis of frictional properties of MoS2 coating under twisting fretting was carried out to study the influence of torsional angle displacement amplitude, normal load, friction Factor and so on the MoS2 coating contact surface mechanical behavior, and compared with the twisting micro-dynamic behavior of the matrix material. The analysis results show that the change of the wrestling fretting area of MoS2 coating can eliminate the damage caused by the crack initiation and propagation in the mixed zone. Although the surface plastic strain of MoS2 coating is larger than that of the matrix in partial slip zone and slip zone, However, the obviously smaller frictional shear stress is not enough to initiate the sliding of the MoS2-coated crystals in the partial slip zone and the shearing of the plastic flow zone in the slip zone is not enough, so the wear of the MoS2 coating surface is slight, ie MoS2 Can effectively play the role of fretting fretting wear.