1. Steelmaking Plant, Lianyuan Iron and Steel Group Co., Loudi 417009, Hunan, China; 2. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China;3.Metallurgical Department, Central Iron and Steel Research Institute, Beijing 100081, China
Abstract：The edge cracking of hotrolled strip was investigated. The results showed that edge cracks can be divided in three types, namely, horizontal crack, vertical crack and edge concave. The main reasons of the edge cracking are: expanding of horizontal cracks (including deep oscillation imprint) and fine vertical cracks of cast blank during reheating and hot rolling; cracking due to thermal and mechanical stress caused in solidification, soaking, hot rolling, laminar cooling and coiling. The main measures of control are: reasonable control of steel composition; determination and maintenance of processing parameters, such as density of heat flow, oscillation parameter, and intensity of secondary cooling. The results of industrial test showed that the edge crack index was decreased from 7.93% to 1.81% by implementation of above mentioned measures.
吴光亮;孙彦辉;焦国华;成小军;周春泉. CSP热轧板卷边部裂纹成因及控制[J]. 钢铁, 2006, 41(6): 0-0.
WU Guangliang;SUN Yanhui;JIAO Guohua;CHENG Xiaojun;ZHOU Chunquan. Reason and Control of Edge Cracking of CSP HotRolled Strip. Iron and Steel, 2006, 41(6): 0-0.
2006, Vol. 41 