Abstract

Environmental conditions, testing variables, and material properties significantly influence the sliding wear behavior of all tribosystems. Such parameters affect the mechanism of wear occurring, govern how the wear scar will be categorized, and control whether transitions occur throughout the test. The present study investigated this through sliding wear tests of AISI 4330, 15-5PH, and heat-treated cast iron in the dry and NaCl regime. Loads of 2, 4, and 6 kg were applied to the cast iron pin in both regimes, with the volume loss results, wear scar morphology, and microstructural evolution analyzed. It was found that the AISI 4330 and 15-5PH discs produced higher volume losses in the dry regime than in the NaCl regime, indicating that the solution had a beneficial effect rather than a detrimental effect versus the dry tribosystem. Beneficial oxidative wear allowed for AISI 4330 to lose less than 15-5PH in the dry regime, with their respective cast iron pins following the same result. Microstructurally, the 15-5PH wear scar cross sections exhibited a mechanically mixed surface layer of refined material mixed with oxides above a layer of grains distorted in the direction of sliding. This highlighted the significant difference between the wear of 15-5PH and AISI 4330, because the latter did not exhibit any areas of interest.

摘要

环境条件、测试变量和材料特性显着影响所有摩擦系统的滑动磨损行为。这些参数影响磨损发生的机制，控制磨损疤痕的分类方式，并控制是否在整个测试过程中发生转变。本研究通过 AISI 4330、15-5PH 和热处理铸铁在干燥和 NaCl 状态下的滑动磨损试验对此进行了调查。在两种状态下对铸铁销施加 2、4 和 6 kg 的载荷，分析了体积损失结果、磨痕形态和微观结构演变。发现 AISI 4330 和 15-5PH 圆盘在干燥状态下比在 NaCl 状态下产生更高的体积损失，表明该溶液与干燥摩擦系统相比具有有益效果而不是有害效果。有益的氧化磨损允许 AISI 4330 在干燥状态下损失小于 15-5PH，它们各自的铸铁销遵循相同的结果。在微观结构上，15-5PH 磨痕横截面显示出机械混合的精制材料表面层与氧化物混合，在滑动方向扭曲的晶粒层上方。这突出了 15-5PH 和 AISI 4330 磨损之间的显着差异，因为后者没有表现出任何感兴趣的区域。