Failure of silicon nitride rolling elements with ring crack defects
Failure of silicon nitride rolling elements with ring crack defects
复制标题
具有环裂纹缺陷的氮化硅滚动体失效
DOI：
10.1016/s0272-8842(97)00025-4
复制
发表时间：
1998
影响因子：
5.2
通讯作者：
M. Hadfield
中科院分区：
文献类型：
--
作者：
M. Hadfield
热等静压氮化硅滚动体目前用于混合滚动体轴承。在大批量生产过程中，环形裂纹等表面缺陷难以检测，因此有必要评估它们对材料滚动接触性能的影响。采用加速滚动接触疲劳台架试验研究了含和不含表面环形裂纹的氮化硅滚动件的失效模式和性能。表面环形裂纹是在氮化硅上发现的，从制造商那里购买，而不是人工制造的。采用染料渗透技术对试验前表面进行分析，给出了试验测试结果。给出了润滑状态的理论计算、接触应力场和有限元分析。采用扫描电镜观察了氮化硅轧制体的失效模式。
Hot isostatically pressed silicon nitride rolling elements are currently used in hybrid rolling element bearings. Surface defects such as ring cracks are difficult to detect during high volume production processes and hence there is a need to assess their influence on the rolling contact performance of the material. An accelerated rolling contact fatigue bench test is used to examine failure mode and performance of silicon nitride rolling elements with and without surface ring cracks. The surface ring cracks are found on silicon nitride as purchased from manufactures and are not produced artificially. Experimental test results are presented with pre-test surface analysis using a dye penetration technique. Theoretical calculations of the lubrication regime, contact stress fields and finite element analysis are presented. Scanning electron microscopy is employed to observe the failure modes of the silicon nitride rolling elements.