滚动接触疲劳下GCr15轴承钢WEB的形成机理
PDF下载 (642)阜汉林,陈金华,蒋港辉,李淑欣.滚动接触疲劳下GCr15轴承钢WEB的形成机理[J].宁波大学学报(理工版),2025,38(3):1-8.DOI:10.20098/j.cnki.1001-5132.2024.1008
FU Hanlin,CHEN Jinhua,JIANG Ganghui,LI Shuxin.White etching bands in GCr15 bearing steel due to rolling contact fatigue[J].Journal of Ningbo University(Natural Science & Engineering Edition),2025,38(3):1-8.DOI:10.20098/j.cnki.1001-5132.2024.1008
| Title: | White etching bands in GCr15 bearing steel due to rolling contact fatigue |
| 作者: | <p class="0" style="font-size:medium, white-space:normal, "> 阜汉林, 陈金华, 蒋港辉, 李淑欣 |
| Author(s): | FU Hanlin, CHEN Jinhua, JIANG Ganghui, LI Shuxin, 蒋港辉, 李淑欣 |
| 关键词: | "> 马氏体钢; 白色蚀刻带; 滚动接触疲劳; 马氏体相变 |
| Keywords: | <p class="06" style="font-size:medium; white-space:normal; martensitic steel; white etching band; rolling contact fatigue; martensitic phase transformation |
| 分类号: | TG113 |
| DOI: | 10.20098/j.cnki.1001-5132.2024.1008 |
| 文献标识码: | A |
| 摘要: | GCr15轴承钢在滚动接触疲劳下失效的主要原因之一是亚表面显微白色蚀刻带(White Etching Band, WEB)的形成。通过金相光学显微镜、扫描电子显微镜、激光共聚焦显微镜、X射线衍射对滚道表面和亚表面的组织变化进行研究。结果分析表明, 通过观察内滚道和分析震动信号得到亚表面微观结构变化是轴承震动失效的主要原因。随着应力的增加, 滚动接触疲劳轴承内圈的亚表面WEB数量和密度逐渐增加。在无暗蚀区的条件下, 马氏体钢在滚动接触疲劳中转变为铁素体带, 包括单条铁素体带和多条组成的铁素体微带。铁素体带的碎裂、位错重排或动态重结晶形成的等轴和细长晶粒组成了WEB, 透镜碳化物的形成与基体和球形碳化物的碳迁移有关。WEB的分布深度、密度与最大剪切应力、最大显微硬度变化所处深度一致, 说明WEB的产生主要由局部剪切应力主导。 |
| Abstract: | One of the main causes of failure in GCr15 bearing steel due to rolling contact fatigue is the formation of subsurface microstructural white etching bands (WEB). The microstructural changes in the raceway surface and subsurface were investigated using optical microscopy, scanning electron microscopy, laser confocal microscopy, and X-ray diffraction. Analysis of the results shows that subsurface microstructural changes, as observed in the inner raceway and from the vibration signal analysis, are the primary cause of bearing vibration failure. As the stress increases, the number and density of subsurface WEBs in the inner ring of the rolling contact fatigue bearing gradually increase. On the condition without dark etching region, martensitic steel transforms into ferrite bands during rolling contact fatigue, including both single ferrite bands and multiple ferrite microbands. The fragmentation of ferrite bands, dislocation rearrangement, or dynamic recrystallization formulate equiaxed and elongated grains, which constitute the WEB. The carbon for the formation of lenticular carbides comes from both the matrix and the spheroidal carbides. The distribution depth and density of WEB correspond to the depth of maximum shear stress and maximum microhardness changes, indicating that the formation of WEB is primarily driven by localized shear stress. |
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| 备注/Memo: | 收稿日期: 2024−10−24 宁波大学学报（理工版）网址: http://journallg.nbu.edu.cn/ 基金项目: 国家自然科学基金（52075271） 第一作者: 阜汉林, 硕士研究生, 主要研究方向: 接触疲劳。E-mail: ahfuhanlin@163.com *通信作者: 李淑欣, 教授, 主要研究方向: 接触疲劳、摩擦磨损性能。E-mail: lishuxin@nbu.edu.cn 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ |
