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| Formation mechanism and control method of longitudinal corner crack on slab with chamfering mold |
| ZHAO Jing1，ZHEN Xin-gang1，ZHU Zhi-yuan1，WANG Yu-long1，ZHANG Hu-cheng1，ZHAO Xin-yu2 |
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 |
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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%.
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Received: 28 November 2014
Published: 06 July 2015
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2015, Vol. 50 
