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| Cause and Preventive Measure for Central Segregation of Bearing Steel Bloom |
| HE Qingwen1, 2,WANG Bao1,WANG Fuming1,LIU Qing1 |
| 1. Metallurgical and Ecological Engineering School, University of Science and Technology Beijing, Beijing 100083, China;2. Special Steel Plant, Laiwu Iron & Steel Co.,Ltd., Laiwu 271105, Shandong, China |
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Abstract The reasons of central segregation of 260 mm×300 mm bearing steel bloom have been analyzed, and the effects of superheat and other factors on central segregation have been investigated. Based on the analysis, some countermeasures to prevent central segregation have been implemented according to the practice in Special Steel Plant of Laiwu Iron and Steel Co., Ltd. Technologies which is used to induce the center segregation contain lowering and stabilizing superheat, choosing reasonably casting speed, intensity of secondary cooling water and the parameters of electromagnetic stirring and so on.
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Received: 01 January 1900
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2009, Vol. 44 
