Abstract：There was surface transversal cracks on the continuous casting beam blank when producing weathering steel in Ma-Steel company, causing rolling waste. Thermal simulation analysis of mould and the thermal imaging temperature analysis of continuous casting billet were carried out. It is found that there are large variations in surface temperature of beam blank, especially from tip to web; the high temperature brittle zone can not be avoided. There are certain amounts of Cu, V, N and Al in the 450 MPa grade weathering steel and low melting point material precipitated on grain boundaries, leading to high temperature ductility decreasing. After improvement, variations in surface temperature of beam blank are reduced, equipment accuracies are improved, low melting point material is decreased, and then the surface transversal cracks are controlled.
王步更， 吴 坚， 杨应东. 异型坯表面横裂纹的控制技术[J]. 中国钢铁期刊网, 2014, 33(3): 29-34.
WANG Bu-geng, WU Jian, YANG Ying-dong. Surface Transversal Crack Control Technology for Beam Blank. Chinese Journal of Iron and Steel, 2014, 33(3): 29-34.
2014, Vol. 33 
