Analysis of the Causes of Sickle Bending in Medium and Thick Plate Coils and Research on Control Measures
Actively controlling sickle bending defects in steel production can effectively improve the shape quality of medium and thick plates.For this purpose,taking the rolling of 3 500 mm medium and thick plates produced by a certain steel plant as an example,the concept of sickle bending is explained,and the causes of sickle bending are analyzed.The results show that the formation of this defect mainly includes the original roll gap wedges of the rough rolling mill and the finishing mill,the large difference in stiffness on both sides of the finishing mill,the poor accuracy and parallelism of the push bed alignment,and the poor shape of the supporting and working rolls of the finishing mill.At the same time,corresponding targeted control measures based on production experience can effectively reduce the defects of sickle bending and further improve the comprehensive yield of the board after improvement.
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