Research and Improvement of edge cracking of J55 slab
JIANG Li-mei,LIU Qing-gang
(1. Technology Center of HBIS Group Hansteel Company, Handan 056015, Hebei, China 2. Hanbao Steel-making Plant of HBIS Hansteel Co., Ltd., Handan 056015, Hebei, China)
Abstract:The edge crack is an important factor which affecting the quality of J55 in Hanbao Steel Plant. In order to study the surface quality of the edge-cracking, metallographic ,scanning electron microscopy ,energy spectrum and other related test methods ,the defects of hot edge bead were analyzed, and comparison of rollingtest was made on continuous casting slab. It proved that the hot-rolled edge crack was caused by corner cracks of continuous casting slab. At the same time the influencing factors were analyzed, such as steel chemical, mould powder, second cooling. By adjusting and controlling the steel chemicals, improving properties of the mold powder, optimizing second cooling, the slab defect of edge cracking reduced from 18% to 1.26%. It is of guiding significance for production practice and the hot-rolled edge defects.
收稿日期: 2017-09-04
出版日期: 2018-04-27
引用本文:
姜丽梅,刘庆岗. J55边裂原因分析与工艺改进[J]. , 2018, 37(2): 41-45.
JIANG Li-mei,LIU Qing-gang. Research and Improvement of edge cracking of J55 slab. , 2018, 37(2): 41-45.