|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||8th International Symposium on High Temperature Metallurgical Processing
||Formation Mechanisms of Inclusions in Spring Steels
||Sha Lv, Zongze Huang, Zan Yao, Xiaodong Ma, Geoff Wang, Zhouhua Jiang, Jin Zou, Baojun Zhao
|On-Site Speaker (Planned)
55SiCr is one of the important spring steels widely used in automobile manufacturing. The presence of micro inclusions in the steel can significantly inﬂuence a number of spring properties such as fatigue strength. It is important to understand the mechanisms of the inclusion formation so that size and proportion of the inclusions can be controlled. Inclusions in Si-killed 55SiCr spring steel have been analysed by scanning electronic microscopy and electron probe X-Ray microanalysis. The chemistry of the inclusions observed in 55SiCr steels can be represented by the SiO2-Al2O3-CaO-MgO system. It was found that the compositions of the inclusions cover a wide composition range which indicates that these inclusions were formed from different reactions. The possible mechanisms of the inclusion formation are discussed. It would be possible to use these fundamental properties to characterize and manage the inclusions in the spring steels deoxidised by Si.
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