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Improvement of controlling techniques of inclusions in pipeline steel
Author(s): 
Pages: 14-17
Year: Issue:  5
Journal: Bao-Steel Technology

Keyword:  管线钢夹杂物纯净度;
Abstract: 对宝钢管线钢精炼和连铸过程钢中夹杂物的变化规律进行了系统评估,得出了LF、RH、中间包和连铸坯过程中夹杂物的特点及变化规律.在此基础上,通过工艺技术的改进,使钢中夹杂物的尺寸、形貌和化学成分等得到了有效控制.10 μm以上尺寸的稍大颗粒的夹杂物去除效果较好,铸坯中夹杂物的平均尺寸达到2 μm以下;夹杂物的数量明显降低;夹杂物成分更集中于Ca系夹杂;高等级管线钢中间包成品氧含量平均达到11×10-4%.
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