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由于在机械加工过程中,采用了卧轴矩平面磨床制样,轴承钢接触疲劳推力片试样表面可能产生细小的显微裂纹,一般用金相光学显微镜在50至200倍下能明显观察到,经测量裂纹深度在0.10—0.20mm之间,本文通称表面显微裂纹。本文用数理统计方法研究了表面显微裂纹对接触疲劳寿命的显著影响,并发现表面显微裂纹的存在使材料的接触疲劳平均寿命下降至正常寿命的1/8,离散度也显著增大,同时研
As in the machining process, the use of horizontal axis grinder sample preparation, bearing steel contact fatigue thrust specimen surface may produce small micro-cracks, the general use of optical microscopy microscope 50 to 200 times can be clearly observed , The measured crack depth between 0.10-0.20mm, this article is commonly known as surface micro-cracks. In this paper, the mathematical statistics method was used to study the significant influence of surface micro-cracks on the contact fatigue life. It was found that the average fatigue life of contact fatigue decreased to 1/8 of the normal life and the dispersion also increased significantly. At the same time research