【摘要】 莱钢炼钢厂１５０ｍｍ×１５０ｍｍ连铸坯产生菱变、鼓肚和纵向凹陷等形状缺陷的主要原因是结晶器及二冷区的不均匀冷却。通过采取定期测量结晶器铜管倒锥度、限定铜管的通钢量为１５００ｔ、加强足辊对弧精度的调整等措施，使１５０ｍｍ×１５０ｍｍ连铸坯形状缺陷的发生率由８．１８％降至３．００％。更多还原

【Abstract】 The main cause produced shape defect,such as rhomboidity, bulge,longitudinal pit,etc,on 150mm×150mm cintinuous casting billet of Laiwu iron and steel general works is nonhomogeneous cooling of mould and secondary cooling area.Through determining the subconing of copper tube of mould at regular intervals,limiting 1500t liquid steel passing through the copper tube,strengthening regulation of footroller to curve accuracy,etc,the appearance rate of shape defect of 150mm×150mm continuous casting billet can be decreased from 8.18% to 3.00%.更多还原