【摘要】 通过电火花强化工艺在不锈钢机械臂表面制备了YG8强化层,采用金相显微镜、X射线衍射分析、硬度和摩擦磨损试验等对物相组成、硬度分布和耐磨性能进行了测试,并分析了表面强化层的作用机理。结果表明,表面强化层中的物相组成为Co₃W₃C、Fe₃W₃C、Fe₇W₆C、Fe₃Mo₃C、W₂C和（Fe,Cr）相;不锈钢机械臂表面强化层的显微硬度远远大于基材硬度,且中间过渡区硬度也相较于基材更高;在相同摩擦磨损时间下,不锈钢基体的摩擦系数都高于表面强化层;不锈钢机械臂表面强化层的相对耐磨性为基体的3.4倍,其磨损机制为磨粒磨损。更多还原

【Abstract】 YG8 strengthened layer was prepared on the surface of stainless steel mechanical arm through the electric spark strengthening technology, the phase composition, hardness distribution and wear resistance were tested by optical microscope, X ray diffraction analysis, hardness and friction wear test, and the mechanism of the surface strengthening layer was analyzed. The results show that the phase components of the surface strengthening layer are Co₃W₃C, Fe₃W₃C,Fe₇W₆C, Fe₃Mo₃C, W₂C and（Fe,Cr）. The micro hardness of the surface strengthening layer is far greater than the hardness of the base material, and the hardness of the intermediate transition region is higher than that of the substrate. Under the same friction and wear time, the friction coefficient of the stainless steel matrix is higher than that of the surface strengthening layer, the relative wear resistance of the surface strengthening layer is 3.4 times of the substrate, the wear mechanism is abrasive wear.更多还原