1. Steelmaking Department， Qinhuangdao Shouqin Metal Material Co.， Ltd.， Qinhuangdao 066000， Hebei， China 2. Plate Technology Department， Shougang Research Institute of Technology， Beijing 100043， China
Abstract：Chamfering mold is one of the effective methods for controlling the transverse corner cracking of slab. However the longitudinal corner cracking will occur in slab with chamfering mold， which is the most critical hinder for wide usage of chamfering mold. The effects on longitudinal corner cracking of chamfered slab of process parameters and equipment accuracy as well as spray nozzle blocking are analyzed. The formation mechanism of longitudinal corner cracking has been found. Research shows that， the main causes of longitudinal corner cracking are the inconsequence taper of narrow face， the deviation of 0 and 1 section connection and spray nozzle clogging. Through effective measures，chamfering mold can be extensively applied to industry manufacture as the percentage of occurrence for longitudinal corner cracking of CC slab is reduced below 0.6%.
赵 晶，甄新刚，朱志远，王玉龙，张虎成，赵新宇. 倒角连铸坯角部纵向裂纹形成机制及控制[J]. 钢铁, 2015, 50(7): 43-47.
ZHAO Jing，ZHEN Xin-gang，ZHU Zhi-yuan，WANG Yu-long，ZHANG Hu-cheng，ZHAO Xin-yu. Formation mechanism and control method of longitudinal corner crack on slab with chamfering mold. Iron and Steel, 2015, 50(7): 43-47.
2015, Vol. 50 
