论文部分内容阅读
为了分析滚动接触疲劳的机理,开发了一种声发射源定位法。使用这种方法发现表层下面疲劳裂纹的位置与实际声发射源的位置是一致的。当疲劳试验在5.75GPa的最大应力和0.19润滑油膜参数的条件下进行时,裂纹的扩展平行于表面,在钢球的滚动方向有一个最大长度约200μm的裂纹,并且分布在表层以下50～200μm之间。虽然润滑油膜系数很小,但在表面找不到任何裂纹。
In order to analyze the mechanism of rolling contact fatigue, an acoustic emission source localization method was developed. Using this method, it is found that the location of the fatigue crack under the skin surface is consistent with the actual location of the acoustic emission source. When the fatigue test was carried out at a maximum stress of 5.75 GPa and a film parameter of 0.19 lubricating oil, the crack spread was parallel to the surface with a maximum length of about 200 μm in the rolling direction of the steel ball and was distributed 50 to 200 μm below the surface layer between. Although the lubricant film coefficient is small, but can not find any cracks in the surface.