连铸矫直区不同角部形状板坯表面温度的数值模拟

摘要

倒角结晶器是避免连铸坯角部横裂纹的产生、改善角部质量的新技术.通过ANSYS数值模拟,计算了不同角部形状的板坯在连铸矫直区的温度分布情况,分析了倒角角度、倒角面长度对板坯角部温度及其热塑性的影响.结果表明,倒角铸坯在提高角部温度和温度均匀性方面效果明显,铸坯角部热塑性随着温度的升高而改善.具有较高角部温度的倒角铸坯基本避开了钢的脆性区间,从而防止了角部横裂纹的产生.倒角结晶器技术在工业化生产应用中取得了良好效果.%Chamfered mold is a new technology that can avoid the generation of corner transverse crack and improve quality of the corner.The temperature distribution of the slab corner of different corner shape in straightening zone during continuous casting was calculated by using ANSYS software,and the influence of chamfer angle and chamfer length on the temperature variation and the hot ductility of slab corner were summarized.The results showed that the chamfered slab can significantly improve the corner temperature and temperature uniformity,and the hot ductility of slab corner was improved with the temperature increasing.The brittle interval of steel can be basically avoid by chamfered slab at a higher corner temperature,thus preventing the generation of transverse corner cracks.The technology of chamfered mold achieved good results in production applications.