45^#钢表面织构上硬脂酸薄膜减摩性能的研究

Tribological Performance of Stearic Acid Film on Textured 45# Steel Substrate

本文中提出了一种在45#钢表面构筑具备优异减摩耐磨性能的薄膜的简易方法.首先采用高浓度氢氧化钠溶液在钢表面制备沟槽状表面织构,然后沉积硬脂酸分子得到减摩耐磨薄膜.用扫描电子显微镜、原子力显微镜、接触角测量仪、X射线光电子能谱仪以及X射线衍射仪等手段表征了薄膜的形成机制、表面形貌和化学组分,并利用微纳米摩擦磨损试验机研究薄膜在干摩擦条件下的减摩耐磨特性.研究结果发现,在经化学刻蚀形成织构的钢表面所沉积的硬脂酸薄膜具有优异的减摩耐磨性能.

A simple two - step process was developed to render steel with lower friction and longer durability. The textured steel substrate was first fabricated by immersed in a sodium hydroxide solution at 95 ℃ for 24 h. Stearic acid film was then deposited to acquire high hydrophobicity. Scanning electron microscopy, water contact - angle measurements, X - ray photoelectron spectroscopy and X - ray diffraction were used to analyze the morphological features, hydrophobicity and chemical composition of prepared samples, respectively. Moreover, the friction - reducing behavior of the organic - inorganic composite film sliding against a steel ball was evaluated in a ball - on - plate configuration. It is found that the stearic acid film on the textured steel led to decreased friction with significantly extended life.