Q345D钢热轧板边裂原因分析与改进措施  

Causes Analysis and Improvement Measures of Edge Cracks of Hot Rolled Q345D Steel Plates

作　　者：孟令涛 刘青 卜志胜 丁寅 MENG Lingtao;LIU Qing;BU Zhisheng;DING Yin(School of Mechanical,Electrical&Information Engineering,Shandong University,Weihai 264209,China;State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing,Beijing 100083,China;Xinjiang Bayi Iron and Steel Co.,Ltd.,Urumchi 830022,China)

机构地区：[1]山东大学机电与信息工程学院,山东成海264209 [2]北京科技大学钢铁冶金新技术国家重点实验室,北京100083 [3]新疆八一钢铁股份有限公司,新疆乌鲁木齐830022

出　　处：《热加工工艺》2021年第15期154-157,161,共5页Hot Working Technology

摘　　要：针对某钢厂生产的Q345D热轧板坯批量出现的边裂缺陷问题,通过对缺陷板坯现场取样、宏观分析、金相显微镜分析、扫描电镜及能谱分析,探讨了边裂缺陷的形成原因。结果表明,由于连铸坯角部产生横裂纹,经加热后裂纹氧化脱碳,轧制时热轧板边部形成裂纹缺陷。通过对现场生产工艺分析,针对性地提出改进措施。采用改进措施后,热轧板边缘开裂的发生率大大降低。Aiming at the problem of edge crack defects in Q345D hot rolled slab produced in a steel plant, the causes of edge crack defects were discussed by field sampling, macroscopic analysis, metallographic microscope analysis, scanning electron microscope and energy spectrum analysis. The results show that due to the transverse cracks at the corner of the continuous casting slab, the cracks are oxidized and decarbonized after heating, which leads to the formation of crack defects in the edge of hot rolled plate during rolling. Through the analysis of the field production process, the improvement measures were put forward. The incidence of edge cracking of hot rolled plate after using improvement measures is greatly reduced.

关 键 词：Q345D热轧板 边裂 改进措施 

分 类 号：TG335.1l[金属学及工艺—金属压力加工]