包晶钢大方坯结晶器出口安全坯壳厚度的研究.pdfVIP

第十五届全国炼钢学术会议文集 包晶钢大方坯结晶器出口安全坯壳厚度的研究 1 2 1 孙立根 崔立新 张家泉 （1 北京科技大学冶金与生态工程学院 邮编 100083；2 中冶连铸北京冶金技术研究院邮编 100081） 摘要：结晶器出口的安全坯壳厚度确定一直是连铸设备与工艺设计中十分关注的问题。基于积分平均法，本 文提出了大方坯的结晶器出口安全坯壳厚度的计算模型；并表明，一定辊列间距下，大方坯的安全坯壳厚度 与断面的关系存在一个转折点。以包晶钢 Q235 为例，当铸坯断面宽度小于 250mm 时，随着断面宽度的增 加要求其安全坯壳厚度也随之增大。当断面宽度大于 250mm 时，随着断面宽度的进一步增加，其安全坯壳 厚度几乎不变。 关键词：连铸 大方坯 安全坯壳厚度 坯壳积分平均强度 Minimum mould exit shell thickness of blooms for peritectic steel casting 1 2 1 Sun-Ligen Cui-Lixin Zhang-Jiaquan （1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing ， Beijing 100083, China 2. BeijingMetallurgical Technology Institute (CCTEC) ,Beijing 100081, China ） Abstract: The value of the minimum mould exit shell thickness is the key for continuous casting machine design and cooling technics setting. On the compute method of integral average strength, the minimum mould exit shell thickness mathematics model has been brought forward; it also shows that, under the fixed distance of the rolls, the relation between minimum mould exit shell thickness of the blooms and the bloom width has a turning point. For Q235, when the bloom width is smaller then 250mm, the minimum mould exit shell thickness would get bigger by increasing the bloom width; but when it is bigger then 250mm, minimum mould exit shell thickness would almost be a fixed value by increasing the bloom width continued. Key words: continuous casting, bloom, minimum mould exit shell thickness, integral average shell strength 连铸