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采用叠装-粘接工艺制备了不同润滑剂含量的钢-聚合物叠层复合材料,以GCr15钢球为摩擦配副,在球-盘摩擦试验机上考察叠层复合材料在不同磁场强度下的摩擦学性能.摩擦实验结果发现:随着磁场强度增大,不含润滑剂的叠层复合材料(S0)的摩擦系数和磨损率均发生显著降低;含润滑剂的叠层复合材料(S4)的摩擦系数和磨损率先缓慢降低后增大.用扫描电子显微镜(SEM)和能谱仪(EDS)观察磨损表面形貌和元素分布,分析其磨损机理表明:细小磨屑被磁场吸附在接触表面并形成了滚珠效应,显著改善了S0的磨粒磨损和粘着磨损;在摩擦热和涡流热作用下,润滑剂迁移到硅钢表面并形成转移膜,使得S4具有良好的润滑性能;在无磁场时S4的聚合物表面发生疲劳剥落,在磁场作用下聚合物以塑性流动和粘着磨损为主.
The steel-polymer composite laminates with different lubricant content were prepared by the laminating-bonding process. The GCr15 steel balls were used as the friction pair, and the laminated composite materials were investigated under different magnetic field strengths on a ball-plate friction tester Tribological properties.The results of the friction test show that the friction coefficient and the wear rate of the lubricant-free layered composites (S0) decrease significantly with the increase of the magnetic field strength. The lubricant-containing laminated composites (S4) The friction coefficient and the wear rate firstly slow down and then increase.The wear surface morphology and elemental distribution were observed by scanning electron microscope (SEM) and energy dispersive spectrometer (EDS), and its wear mechanism was analyzed.The results showed that the fine wear debris was adsorbed on the contact surface And the formation of the ball effect, significantly improve the S0 abrasive wear and adhesion wear; friction heat and eddy current heat, the migration of the lubricant to the surface of the silicon steel and the formation of transfer film, making S4 has good lubrication properties; in the absence of a magnetic field S4 polymer surface fatigue spalling, the polymer under the action of a magnetic field plastic flow and adhesive wear-based.