论文部分内容阅读
针对连铸结晶器铜管的锥度设计问题,采用凝固收缩——传热反馈调节计算方法,对130 mm×130 mm连铸结晶器内的传热、凝固及凝固收缩进行了计算研究,并与传统的利用假设的热流密度进行连铸坯锥度设计的计算方法进行对比。结果表明该计算方法可以有效地模拟实际连铸过程中角部区域凝固收缩对热流密度及温度分布的影响。针对CB300-V钢种,断面130 mm×130 mm连铸坯在3 m/min拉速下的计算结果为:凝固坯壳角部温度1 250℃,与经典热流公式计算的角部温度700℃有明显差别,面中心处明显的收缩开始于距结晶器上沿0.4 m的位置,凝固收缩的数值集中在0.000 2 m的范围内,角部最大收缩量为0.001 575 m。随着距表面距离的加大,凝固收缩呈减小趋势,凝固收缩的减少量与距离呈非线性关系。
Aiming at the taper design problem of continuous casting mold copper tube, the heat transfer, solidification and solidification shrinkage in a 130 mm × 130 mm continuous casting mold were calculated by the method of solidification shrinkage - heat transfer feedback regulation. The traditional method of calculating taper design of slab using the assumed heat flux density is compared. The results show that this method can effectively simulate the influence of solidification shrinkage on heat flux density and temperature distribution in the corner area during the continuous casting process. For the CB300-V steel, the calculated results of the 130 mm × 130 mm slab at a casting speed of 3 m / min are as follows: the corner temperature of the solidified shell is 1,250 ° C, and the corner temperature calculated by the classical heat flow formula is 700 ° C There is a clear difference. The apparent shrinkage at the center of the face begins at a distance of 0.4 m from the upper edge of the crystallizer. The values of coagulation and shrinkage are concentrated in the range of 0.000 2 m and the maximum shrinkage at the corner is 0.001 575 m. As the distance from the surface increases, the solidification shrinkage decreases and the reduction of solidification shrinkage is nonlinear with the distance.