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由于结晶器热调宽过程中铸坯变形及气隙的影响,因此热调宽速度不能有效提高,且易造成铸坯缺陷及漏钢等风险。通过研究结晶器热调宽过程中窄边移动所产生的坯壳变形及气隙产生机理,对调宽过程中的关键参数(例如:铸坯变形速率、调宽速度、加速度等)进行了公式推导和定量分析。生产验证表明,热调宽过程快速、安全、稳定,过渡楔形坯的表面质量和角部质量良好,其热调宽速度等关键技术指标达到国际先进水平。
Due to the deformation of the billet and the influence of the air gap during the hot widening of the mold, the thermal widening speed can not be effectively increased, and the risk of slab defects and steel leakage can easily result. The key parameters (such as slab deformation rate, width adjusting speed, acceleration, etc.) in the process of adjusting width are deduced by studying the deformation of the shell and the mechanism of air gap caused by the narrow side movement in the thermal widening process of the mold And quantitative analysis. The production verification shows that the heat transfer widening process is fast, safe and stable. The surface quality and corner quality of the transitional wedge are good. The key technical indexes such as the thermal transfer width and the width reach the international advanced level.