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| Inclusions control in anti-fatigue stress steel |
| KANG Wei1， JIN You-lin2 |
| （1. General Office，Magang （Group） Holding Co.， Ltd.， Ma'anshan 243003， Anhui， China； 2. Special Steel Company of Ma'anshan Iron and Steel Co.， Ltd.， Ma'anshan 243003， Anhui， China） |
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Abstract n order to effectively control the inclusion damage in steel with anti-fatigue stress，through the theoretical analysis of the typical harmful inclusions in the fatigue stress steel， some optimizations and improvements have been carried out from the aspects of deoxidation process， refining slag system， calcium treatment process， soft blowing process and casting protection in continuous casting etc， and the corresponding effects have been achieved. The effective control of inclusions in the steel is realized，the shape of inclusions is mainly small spherical and block-shaped，the inclusions are mainly composed of calcium aluminate and MnS composite inclusions，the inclusion size is controlled within 20 μm， of which more than 90% of the inclusions are controlled within 7 μm.
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Received: 06 November 2018
Published: 09 May 2019
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2019, Vol. 54 
