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| Numerical simulation of heat-transfer and strain during solidification in ultra-thick rectangular slab with different shape of corner |
| SHEN Yan-qiang1，BAI Ming-hua1，GAO Peng-lei1 ，CHEN Jian-xing2 |
（1. National Engineering Research Center for Equipment and Technology of Cold Strip Rolling，Yanshan University，Qinhuangdao 066004， Hebei， China
2. China National Heavy Machinery Research Institute Co.， Ltd.， Xi’an 710032， Shaanxi， China |
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Abstract In order to effectively control and reduce the transverse crack defect at corner of continuous casting slab，the current study developed two kinds of slab model，which are strands with round corner and with chamfered corner，based on the formation mechanism of transverse crack defects. The solidification process of ultra-thick rectangular slab was simulated，and the distribution of temperature and shell growth along casting direction were obtained. Based on the solidification simulation，the thermal-mechanical coupling moded was established to analyze the stress variation within solidified strand. The possibilities of crack formation on steel grades were discussed. The results showed that the distributions of temperature and stress at corner for slab with round mold or chamfered mold have been improved，compared to the traditional rectangular mold. The designed molds could make the solidified strand avoid effectively high temperature brittle zone of steel in secondary cooling zone and reduce the stress value at the corner of slab，resulting in a reduction of crack formation.
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Received: 16 July 2015
Published: 14 April 2016
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2016, Vol. 51 
