Abstract In this study, results of aluminum bronze coatings (CuAl9Fe3) and manganese bronze coatings (CuMn11Al8Fe3Ni3) deposited on specimens made of S355J2 steel using the laser cladding method are presented. This research was carried out to learn the wear mechanisms and tribological parameters of the analyzed bronze coatings in terms of their applicability for railway buffer heads, instead of covering the latter with graphite grease, which entails several disadvantages. It was found that the laser cladding method allows obtaining durable coatings of aluminum bronze (CuAl9Fe3) and manganese bronze (CuMn11Al8Fe3Ni3) on a substrate made from S355J2 steel. Microscopic examination performed after laser cladding of the above described bronzes showed the presence of three zones: the coating, the heat affected zone, and the substrate. The CuMn11Al8Fe3Ni3 manganese bronze coating was characterized by a significantly higher hardness (236.9 HV) than in the case of the CuAl9Fe3 aluminum bronze (181.5 HV). Based on the obtained results, it was found that aluminum bronze coatings had higher wear resistance in comparison to manganese bronze coatings, which may be associated with a higher fraction of Cu2O and Al2O3 phases. The results obtained indicate that the use of a CuAl9Fe3 coating allows for a significant reduction of sliding wear compared to uncoated samples (average wear was reduced by approx. 89.36%), while the use of graphite lubricant allows for an average wear reduction of ca. 91.35%. SEM examination of the specimen surfaces coated with aluminum and manganese bronze showed visible signs of scratching, plowing and micro-cutting, which proves the sliding nature of the specimen wear.

中文翻译：

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铁路缓冲头青铜涂层滑动磨损检测

摘要 在这项研究中，介绍了使用激光熔覆方法在 S355J2 钢制成的试样上沉积铝青铜涂层 (CuAl9Fe3) 和锰青铜涂层 (CuMn11Al8Fe3Ni3) 的结果。进行这项研究是为了了解所分析的青铜涂层的磨损机制和摩擦学参数，以了解它们对铁路缓冲头的适用性，而不是用石墨润滑脂覆盖后者，这会带来几个缺点。发现激光熔覆方法允许在由 S355J2 钢制成的基材上获得铝青铜 (CuAl9Fe3) 和锰青铜 (CuMn11Al8Fe3Ni3) 的耐用涂层。在对上述青铜进行激光熔覆后进行的显微镜检查表明存在三个区域：涂层、热影响区和基材。CuMn11Al8Fe3Ni3 锰青铜涂层的特点是硬度 (236.9 HV) 比 CuAl9Fe3 铝青铜 (181.5 HV) 高得多。根据获得的结果，发现铝青铜涂层与锰青铜涂层相比具有更高的耐磨性，这可能与更高比例的 Cu2O 和 Al2O3 相有关。获得的结果表明，与未涂层样品相比，使用 CuAl9Fe3 涂层可显着减少滑动磨损（平均磨损减少约 89.36%），而使用石墨润滑剂可使平均磨损减少约 89.36%。91.35%。涂有铝和锰青铜的试样表面的 SEM 检查显示出明显的划痕、犁痕和微切割迹象，