Cause analysis and improving measures of central crack in continuous casting slab of Q235B steel
TANG Wei，MENG Ling-tao1， SUN Li-bin2， BU Zhi-sheng2， LI You-huai3， WANG Lei3， DOU Kun1， HAN Yan-shen1， LIU Qing1
（1. Xiangtan Iron and Steel Co.， Ltd of Hunan Valin.， Xiangtan 411101， Hunan， China 2. State Key Laboratory of Advanced Metallurgy， University of Science and Technology Beijing， Beijing 10083， China 3. Xinjiang Ba Yi Iron and Steel Co.， Ltd.， Urumchi 830022， Xinjiang China 4. Jiangsu Boji spraying system Co.， Ltd.， Yangzhou 225200， Jiangsu China）
Abstract：Based on the central crack in continuous casting slab， the metallography observation， scanning electron microscope and power spectrum analysis were adopted to test and analyse central crack. The results show that there are impurity elements segregations such as sulfur in the crack band， the intergranular segregation of sulfur element is the central cause of producing in central crack. The Al2O3 inclusions， which are the large particles in the steel matrix and not easy to deform， can easily become the source of the crack， and accelerate the generation of central cracks. Through analysis of the causes of the central cracks in the continuous casting slab and the actual production process， the corresponding measures are put forward， which can effectively control the central crack in the slab.
收稿日期: 2017-02-16
出版日期: 2017-11-14
引用本文:
汤 伟， 孟令涛， 孙利斌， 卜志胜， 李有怀， 王 雷，窦 坤， 曾凡政， 刘 青. Q235B钢连铸板坯中间裂纹成因分析及改进措施[J]. , 2017, 36(5): 59-65.
TANG Wei，MENG Ling-tao， SUN Li-bin， BU Zhi-sheng， LI You-huai， WANG Lei， DOU Kun， HAN Yan-shen， LIU Qing. Cause analysis and improving measures of central crack in continuous casting slab of Q235B steel. , 2017, 36(5): 59-65.
2017, Vol. 36 
