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| Thermomechanical Model of Heat Transfer in Bloom Casting Mold |
| CHEN Yong1，2,LUO Xin3，SHEN Houfa3 |
| 1. School of Materials and Metallurgy, Northeastern University, Shenyang 110004, Liaoning, China; 2. Department of Material Research, Panzhihua Iron and Steel Research Institute, Panzhihua 617000, Sichuan, China;3. Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China |
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Abstract The longitudinal corner surface cracks were occurred at the initial stage of operation of continuous bloom caster at Pangang. Therefore, a thermomechanical model was developed to analyze the heat transfer and the stress distribution of strand in the mold. The heat transfer was analyzed with the steady model and the transient model, respectively. The contact of the mold and strand was taken into account in the mechanical model to treat the air gap formation at the mold corner, and the strain as well as stress of strand were analyzed with thermal elastoplastic model. The calculated results of the temperature of and stress distribution in the strand cast with two different molds show that the corner configuration has a great effect on heat transfer near the corners.When the corner configuration is optimized from 25 mm×45° to 12 mm×45°, the strand temperature becomes lower and the solidified shell thickness becomes thicker, which will reduce the cracking tendency near the corners.
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Received: 01 January 1900
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2008, Vol. 43 
