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首页> 外文会议>Bearing steel technology: Developments in rolling bearing steels and testing >The Role of Hydrogen on Rolling Contact Fatigue Response of Rolling Element Bearings
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The Role of Hydrogen on Rolling Contact Fatigue Response of Rolling Element Bearings

机译：氢在滚动轴承的滚动接触疲劳响应中的作用

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It is generally accepted that the rolling contact fatigue (RCF) life of bearing components is strongly reduced when the hardened steel matrix contains hydrogen. Although frequently reported in the literature, a physically sound explanation to this phenomenon has not yet been presented. In recent work on building understanding around the nature of the RCF damage process, we have reported on the development of a physically based fatigue damage model. Here we discuss an attempt to interpret the role of hydrogen on the micro-plastic fatigue damage mechanism on the basis of this concept. In this context, the role of hydrogen on the RCF response has been studied in order to find evidence for and to determine its weakening effect on hardened and low-temperature tempered (bearing) steels. In order to perform valid tests, effort was put in controlling the hydrogen content in bearing components before testing using an electrochemical hydrogen charging process. A number of bearing tests were performed clearly showing differences in fatigue response with different amounts of hydrogen present in the micro-structure. The results of testing of bearings with hydrogen-containing steel matrices are given. It was found that increased hydrogen content in bearing steel at 5 ppm (by weight) will significantly promote bearing spalling failure and enhance the formation and growth of so-called white-etching crack systems. This experimental information is interpreted in the light of the physically based fatigue damage model.
机译：通常认为，当硬化的钢基体包含氢时，轴承部件的滚动接触疲劳（RCF）寿命会大大降低。尽管在文献中经常报道，但尚未提出对该现象的物理上合理的解释。在围绕RCF损伤过程的本质建立理解的最新工作中，我们报告了基于物理的疲劳损伤模型的开发。在此，我们讨论了基于此概念解释氢在微塑性疲劳损伤机理中的作用的尝试。在这种情况下，已经研究了氢在RCF响应中的作用，以寻找证据并确定其对淬硬和低温回火（轴承）钢的削弱作用。为了进行有效的测试，在使用电化学氢填充工艺进行测试之前，已努力控制轴承部件中的氢含量。进行了许多轴承测试，清楚地表明了在微观结构中存在不同量的氢时疲劳响应的差异。给出了含氢钢基质轴承的测试结果。发现以5 ppm（按重量计）增加轴承钢中的氢含量将显着促进轴承剥落破坏，并增强所谓的白蚀裂纹系统的形成和生长。根据基于物理的疲劳损伤模型解释该实验信息。

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