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首页> 美国卫生研究院文献>Nanomaterials >Chemical- and Mechanical-Induced Lubrication Mechanisms during Hot Rolling of Titanium Alloys Using a Mixed Graphene-Incorporating Lubricant
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Chemical- and Mechanical-Induced Lubrication Mechanisms during Hot Rolling of Titanium Alloys Using a Mixed Graphene-Incorporating Lubricant

机译：掺石墨烯混合润滑剂在钛合金热轧过程中的化学和机械润滑机理

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Hot rolling of titanium alloy currently is carried out without lubrication because of the surface defects. In order to explore an effective lubrication scheme to reduce friction and wear during hot rolling of titanium alloy, a mixed graphene-incorporating lubricant has been proposed to study its lubrication performance and mechanism. The tribological experiments were carried out by ball-disk friction and wear tester under hot-rolling parameters. Scanning electron microscopy (SEM), X-ray energy spectrum analyzer (EDS), X-ray powder diffractometer (XRD) and Raman analysis were used to analyse the surface and cross-section of the wear marks on the samples after the tribological experiments. The results show that the friction coefficient decreases up to about 35% compared with tests under dry and lubricated conditions. The surface quality of the wear marks is improved significantly after applying the proposed lubricant. The graphene which is embedded in the phosphate film can be effectively applied as a lubricating material to strengthen the lubricating film with less combustion loss at high temperatures. A chemical- and mechanical-induced lubrication mechanism for the hot rolling of titanium sheets has been proposed due to the synergistic lubrication effect of the graphene, ZrO nano particles and phosphate. It is of great significance and potential value to apply this proposed lubricant as an effective way to reduce the wear, friction and oxidation during the hot-rolling process of titanium alloy.
机译：由于表面缺陷，目前钛合金的热轧无需润滑即可进行。为了探索减少钛合金热轧过程中摩擦和磨损的有效润滑方案，提出了一种掺入石墨烯的混合润滑剂，以研究其润滑性能和机理。在热轧参数下，用球盘摩擦磨损测试仪进行了摩擦学实验。摩擦学实验后，使用扫描电子显微镜（SEM），X射线能谱分析仪（EDS），X射线粉末衍射仪（XRD）和拉曼分析来分析样品上的磨损痕迹的表面和横截面。结果表明，与在干燥和润滑条件下进行的测试相比，摩擦系数降低了约35％。使用建议的润滑剂后，磨损痕迹的表面质量得到显着改善。埋在磷酸盐膜中的石墨烯可以有效地用作润滑材料，以在高温下燃烧损失较小的情况下增强润滑膜。由于石墨烯，ZrO纳米颗粒和磷酸盐的协同润滑作用，已经提出了化学和机械诱导的钛板热轧润滑机理。将这种建议的润滑剂作为减少钛合金热轧过程中的磨损，摩擦和氧化的有效方法具有重要意义和潜在价值。

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