帘线钢72A连铸坯的原位统计分布分析

发布时间：2018-06-18 04:09

本文选题：原位统计分布分析 + 帘线钢　；参考：《冶金分析》2016年12期

【摘要】：为了更好地了解铸坯中元素偏析、疏松和夹杂物分布规律,采用金属原位分析仪对帘线钢72A连铸坯进行了原位成分统计分布分析,并探讨了铸坯中C、Si、Mn、P、S和Al元素分布规律,发现C、Si、Mn和P元素在铸坯中心都存在明显的偏析,且中心区域的偏析程度比边部严重。Mn元素含量的分布规律与C元素相似,在铸坯边部附近,C、Mn元素有明显的负偏析带,在铸坯中心区域元素出现了明显的正偏析带,整体上,Mn元素成分分布比C元素更均匀;比较这几种元素的成分分布,发现Si元素成分分布较均匀,而P元素成分分布较不均匀。帘线钢中Al、S元素基本上都以夹杂物的形式存在,两种元素分布规律极其相似,且中心夹杂物的含量明显比边部多。由于铸坯中心存在明显的缩孔,导致铸坯表观致密度下降,表观致密度为0.869 0。
[Abstract]:In order to better understand the distribution of elements segregation, porosity and inclusions in the billet, the in-situ composition distribution of the continuous casting billet 72A of cord steel was analyzed by metal in-situ analyzer, and the distribution of elements CnSiMnPnPnS and Al in the billet was discussed. It is found that there are obvious segregation of mn and P elements in the center of the billet, and the distribution law of the element content in the central region is similar to that in the C element, and there is an obvious negative segregation band for the element Cnn near the edge of the billet. An obvious positive segregation zone appears in the central region of the billet, and the composition distribution of mn element is more uniform than that of C element on the whole, and the composition distribution of Si element is more uniform than that of P element, and the composition distribution of P element is not uniform by comparing the composition distribution of these elements. Al-S elements in cord steel are basically in the form of inclusions, and the distribution of the two elements is very similar, and the content of central inclusions is obviously more than that of edge parts. Due to the obvious shrinkage hole in the center of the billet, the apparent density of the billet decreased, and the apparent density was 0.869.
【作者单位】：辽宁科技大学;钢铁研究总院;
【分类号】：TG260

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