钢带喂入比对铸坯组织的影响

通过试验设计,研究了不同钢带喂入比对铸坯组织的影响。结果表明:钢带在恒温钢液中的熔化过程分为两个阶段,开始时钢带残余厚度随喂入时间的增加而快速增加,最多增加100%;钢带厚度达到最大值后开始缓慢减小,直到钢带在钢液中全部熔化,此时钢带残余厚度变为零。钢带喂入比影响铸坯等轴晶率和等轴晶晶粒大小,钢带喂入比从0增加到3%,铸坯等轴晶率从49.3%增加到75.3%,提高52.7%,平均等轴晶晶粒尺寸减小55.4%。过大的喂入比导致铸坯芯部疏松,合适的钢带喂入比为1%。

Effect of strip feeding ratio in molten steel on slab microstructure

The effect of feeding amount of strip on slab microstructure are studied by trial design.The result shows that the melting process of strip in liquid steel with the constant temperature can be divided into two stages.The first stage,at the beginning,the residual thickness of strip is rapidly increased,up to 100% with the increment of the feeding time;the second stage,after the maximum value of strip thickness is reached,the thickness is decreasing in turn until the strip is fully melt in liquid steel,and th...