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| afety Thickness of Solidified Shell at Mold Export of Heavy Section Continuous Casting Billet |
| BAI Ming-hua,YAN Qi,ZHENG Zhi-yong,CHEN Jian-xing |
| National Engineering Research Center for Equipment and Technology of Cold Strip Rolling, Yanshan University, Qinhuangdao 066004, Hebei, China |
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Abstract The safety thickness of solidified shell has a very significant impact on the safety of the continuous casting production, the quality of billets and the length of crystallizer. The calculation model was based on 700 mm×700 mm billets. The stress distribution of different thickness of the solidified shell model was analyzed by the results of finite element calculation. The stress distribution of slab surface and yield limit of material was used to judge whether the solidified shell is in safe production status. The results show that, the limitation of the thickness is 26 mm. As the shell thickness increases, the slab surface stress decreases and gradually away from the yield limit. Considered the shell growth in homogeneity, the safety factor was discussed to adjust the shell thickness in safe. For this model the safety factor is 1.46, the revised safety average shell thickness is 38 mm.
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Received: 03 September 2013
Published: 28 April 2014
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2014, Vol. 49 
