摘要
通过取Q890D钢板边部线状缺陷试样进行分析,基于裂纹两侧氧化圆点总量少且不均匀分布以及其从表面向钢基延伸的特点,确定缺陷产生于展宽轧制环节,通过优化连铸二次冷却工艺、提高均热段温度至1230℃以及增加1~2道的展宽道次等措施,使该类缺陷的发生率由40%以上降至3%以下。
Through the analysis of linear defect samples at the edge of Q890D plate, from the characteristics of less total amount of oxidation dots and their uneven distribution on sides of the crack, besides their extending features from the surface to the steel base, it is determined that the defects are generated in the broadside rolling link. By optimizing the secondary cooling process of continuous casting, increasing the temperature of soaking section to 1230˚C and adding 1~2 broadside passes, the occurrence rate of such defects is reduced from more than 40% to less than 3%.
出处
《冶金工程》
2021年第4期207-213,共7页
Metallurgical Engineering
