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首页> 外文会议>STP 1465; Symposium on Bearing Steel Technology-Advances and State of the Art in Bearing Steel Quality Assurance; 20050517-19; Reno,NV(US) >Cleanliness of Bearing Steels and Fatigue Life of Rolling Contacts
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Cleanliness of Bearing Steels and Fatigue Life of Rolling Contacts

机译：轴承钢的清洁度和滚动轴承的疲劳寿命

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摘要

Established metallographic methods of determining the cleanliness of bearing steels with respect to micro-inclusions, such as ASTM E 45, are capable of differentiating poor quality melts from good quality melts. However, as steelmaker capabilities improve, with increasing numbers being able to consistently produce good quality melts, the established methods of cleanliness assessment are unable to differentiate between melts. These established methods, which give single figure ratings based on both the size and number of inclusions, are extremely difficult to use in predicting the performance of a bearing component under conditions of rolling contact fatigue. In this work, the method of Extreme Value Analysis (EVA) is used to characterize the inclusion population of five different steel melts of known and varying quality. A link between the EVA distribution and the measured bearing life, performed on material with a low reduction ratio, is also presented.
机译：确定轴承钢相对于微夹杂物的清洁度的既定金相方法，例如ASTM E 45，能够将劣质熔体与优质熔体区分开来。但是，随着钢铁制造商能力的提高，越来越多的人能够始终如一地生产出高质量的熔体，既定的清洁度评估方法无法区分熔体。这些既定的方法，根据夹杂物的大小和数量给出单个图形的额定值，在滚动接触疲劳条件下极难用于预测轴承部件的性能。在这项工作中，使用极值分析（EVA）方法来表征五个质量已知且变化的钢水的夹杂物数量。还显示了在低减速比的材料上进行的EVA分布与测得的轴承寿命之间的联系。

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