Abstract：Based on 842 heats of SS400, the flange crack of hot-rolled H section steel of SS400 was analyzed by using optical microscope, scanning electron microscopy and other methods .The results indicated that the blister, edge crack, surface inclusion and skin blowhole are the main factors causing the flange crack defect. The measures for improving H section steel quality were put forward such as controlling chemical compositions and stirring time, increasing the ratio of manganese and sulphur, decreasing inclusions and ensuring adequate tundish baking time, reforming the mould powder, decreasing overheat of tundish, adjusting the process parameters and optimizing the secondary cooling.
王克锋，宋介中，李明贤，何力国，赵锐. SS400热轧H型钢翼缘开裂成因及控制措施[J]. 钢铁, 2011, 46(9): 96-100.
WANG Ke-feng1,SONG Jie-zhong2,LI Ming-xian1,HE Li-guo1，ZHAO Rui2. Analysis of Flange Crack on Hot-Rolled H Section Steel of SS400. Iron and Steel, 2011, 46(9): 96-100.
2011, Vol. 46 
