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| Effect of CC Process Parameters on Secondary Dendrite Arm Spacing of High Carbon Steel Billets |
| FENG Jun1,CHEN Weiqing1,HAN Jing1,DUAN Guisheng1,2 |
| 1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China;2. Technical Center, Anyang Iron and Steel Group Co., Anyang 455004, Henan, China |
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Abstract The study of secondary dendritic arm spacing(SDAS) in high carbon steel billets shows that the SDAS decreases with application of MEMS or increase with secondary cooling intensity, and the SDAS increases with increase of superheat and casting speed. The structure of columnar crystals is observed for billets cast without MEMS, and equiaxed structure for billets cast with MEMS, in which SDAS decreases obviously with increase of stirring current. The results indicate that the central carbon segregation of billets is aggravated with the increase of permeability due to enlarged SDAS.
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Received: 01 January 1900
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2006, Vol. 41 