Study on Intermediate Crack in Continuous Casting Slab of Medium Carbon Steel

摘要：

According to the analysis of the macro and micro characteristics of the center of continuous casting blooms by acid wash, SEM, metallographic and scanning-type electron microscope, there was a serious segregation and some shrinkage cavities in the slab; Cracks occurred at the end of the columnar crystal and spread along the boundary of the primary dendrite. At the crack enriched a large number of impurity elements, carbon, phosphorus, sulfur, whose crystal boundary segregation is the internal factor of the intermediate cracks. Determining the originated location of intermediate cracks and calculating the total strain in this area during solidification process of slab, it is found that the load is the external factor of cracks generation and expansion.

关键词： intermediate crack slab crystal boundary segregation

作者: CHEN Shao-dong HU Zhao-fan YUAN Yang-yang LUOYan-zhao

作者单位: School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing,Beijing 100083, China

会议类型: 国际会议

会议名称: The 2nd International Symposium on Clean Steel(第二届洁净钢生产技术学术研讨会)

会议地点: 沈阳

会议语种:英文

页码: 383-388

在线出版日期: 2011-08-23（万方平台首次上网日期，不代表论文的发表时间）