Study on the Influence of Oxygen Content on Fatigue Life of Bearing Steel Using Statistics of Extreme Values

Ho Hua Chung; Chin Chuan Hsu

doi:10.4028/www.scientific.net/AMR.287-290.879

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 287-290Study on the Influence of Oxygen Content on...

Study on the Influence of Oxygen Content on Fatigue Life of Bearing Steel Using Statistics of Extreme Values

Abstract:

In this study, scanning electron microscopy (SEM) and energy dispersive spectrometer (EDS) are used to measure the inclusion size and identify the inclusion type respectively. The evaluated maximum nonmetallic inclusion size of bearing steel has been obtained using statistics of extreme values (SEV), and the influence of oxygen content on the maximum nonmetallic inclusion size and the fatigue life of bearing steel have also been discussed. By adopting the criterion of return period (T) at 200, the serial analyses show that the predicted inclusion size for_max is proportional to the oxygen content of steel, but the relation between fatigue life and oxygen content of steel is inverse proportion. This results from the defragment of hard inclusion during rolling process, and the decrease of concentration of stress around the inclusion.

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Periodical:

Advanced Materials Research (Volumes 287-290)

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879-882

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.287-290.879

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Online since:

July 2011

Authors:

Ho Hua Chung, Chin Chuan Hsu

Keywords:

Bearing Steel, Inclusion, Oxygen Content, Statistics of Extreme Values

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