Abstract：For surface longitudinal crack of the continuous casting slab of atmospheric corrosion resisting steel， in combination with the production practice， discussed the factors， such as composition， mold powder， mold cooling， secondary cooling， etc.， and put forward the improvement and optimization direction of continuous casting process. The production practice indicated that， by adjusting the Ni/Cu rate larger than 0.3， using a special powder of weathering resistant steel with high basicity， high melting point and low viscosity， adjusting the mould taper over 1.0% per meter， choosing the weak cooling in the mould and the secondary cooling zone， controlling the unsteady casting strictly， maintaining the superheat of molten steel at 20-30 ℃， stabling liquid surface fluctuation within 2%， casting speed fluctuation in ±0.2 m/min， the occurrence rate of the slab surface longitudinal cracks was reduced from more than 50% to 3%.
王中岐，王新志，夏志升，张振申. 高耐候钢板坯表面纵裂成因分析与控制[J]. 中国钢铁期刊网, 2015, 34(4): 60-64.
WANG Zhong-qi，WANG Xin-zhi，XIA Zhi-sheng，ZHANG Zhen-shen. Analysis and prevention of surface longitudinal cracks of atmospheric corrosion resisting steel slab. Chinese Journal of Iron and Steel, 2015, 34(4): 60-64.
2015, Vol. 34 
