The direct metal/metal sliding contact causes a severe wear with a high friction coefficient and an important wear rate. Applying magnetic field into the rotating sliding steel Fe360 B/steel Fe360 B modifies the friction and the wear behavior of the contact. The experimental tests were conducted in three different environments such as: ambient air, pure oxygen at 105 Pa and high vacuum at 5.10−5 Pa. In ambient air and without magnetic field, the metal/metal contact is ductile. When a magnetic field is applied, the formation of oxide layer evolves progressively with the number of sliding cycles. This contact has a low friction and mild wear. Under oxygen, the oxide film appears in wear track with and without applied magnetic field. The wear rate under oxygen is lower than that in ambient air with a ratio roughly equals to 10. In oxygen, the average value of friction coefficient µ decreases from µ = 0.41 to µ = 0.30. In vacuum, the increase of surface hardness causes a transfer of particles from the disc towards the pin. This transfer modifies the morphology of the wear track, increases the surfaces roughness and leads to a strong adhesive wear. The different analysis obtained with: microscopy, micro-harness, wear losses, EDX and friction evolution explains the effect of applied magnetic field on the friction behavior of Fe360 B steel.

中文翻译：

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磁化滑动铁磁接触在真空和不同气体环境下的摩擦

直接的金属/金属滑动接触会导致严重的磨损，具有高摩擦系数和重要的磨损率。将磁场施加到旋转滑动钢 Fe360 B/钢 Fe360 B 中会改变接触的摩擦和磨损行为。实验测试在三种不同的环境中进行，例如：环境空气、105 Pa 的纯氧和 5.10-5 Pa 的高真空。在环境空气和无磁场中，金属/金属接触具有延展性。当施加磁场时，氧化层的形成随着滑动循环的次数而逐渐演变。这种接触具有低摩擦和轻度磨损。在氧气作用下，无论有无外加磁场，都会在磨损轨迹上出现氧化膜。氧气下的磨损率低于环境空气中的磨损率，比值大约为 10。在氧气中，摩擦系数 μ 的平均值从 μ = 0.41 减小到 μ = 0.30。在真空中，表面硬度的增加导致颗粒从圆盘向销转移。这种转移改变了磨损轨迹的形态，增加了表面粗糙度并导致强烈的粘附磨损。通过显微镜、微线束、磨损损失、EDX 和摩擦演变获得的不同分析解释了外加磁场对 Fe360 B 钢摩擦行为的影响。