Abstract An initial friction peak typically occurs in a dry self-mated quenched and tempered steel fretting contact in gross sliding conditions. The peak is related to adhesive friction and wear, which causes non-Coulomb friction. An early surface degradation including cracks may occur. To avoid such a peak, different media were studied using a flat-on-flat fretting test device with a large annular contact. All the media decreased the initial friction peak in comparison to the dry reference case, and in one series the peak was completely removed. The peak could often be delayed by lubrication. The steady-state coefficient of friction values mostly remained at similar levels to those of the dry contact, but decreased when oil was applied. Nevertheless, some surface damage occurred in every test, with varying amounts of wear.

中文翻译：

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避免微动中的初始粘附摩擦峰值

摘要 初始摩擦峰值通常出现在粗滑动条件下的干式自配合调质钢微动接触中。峰值与粘附摩擦和磨损有关，这会导致非库仑摩擦。可能会发生早期的表面退化，包括裂纹。为了避免出现这样的峰值，使用具有大环形接触的平对平微动测试装置研究了不同的介质。与干参考情况相比，所有介质都降低了初始摩擦峰值，并且在一系列中完全去除了峰值。峰值通常会因润滑而延迟。稳态摩擦系数值大多保持在与干接触相似的水平，但在涂油时会降低。然而，在每次测试中都会出现一些表面损坏，磨损程度不一。