1. Technology Center， Shanxi Taigang Stainless Steel Co.， Ltd.， Taiyuan 030003， Shanxi， China 2. College of Materials Science and Engineering， Taiyuan University of Technology，Taiyuan 030024， Shanxi， China
Abstract：The formation causes of surface transversal cracks of S355NL continuous casting round bloom was investigated using macrostructure and microstructure solidified structure analysis， and energy spectrum composition of crack zone was also analyzed. According to analyzed results， it can be inferred that transversal cracks originate from mould， cracks propagate in the secondary cooling system， and then cracks are dilacerated in the straightening stage. Surface transversal cracks were prevented through improving continuous casting speed by 8.69%， decreasing secondary cooling strength by 10%， and adopting special peritectic steel mould slag.
收稿日期: 2016-08-02
出版日期: 2017-01-16
引用本文:
张锦文，王文先，李建军，陈金虎，王育田. S355NL连铸圆坯表面横裂纹形成原因分析及改进[J]. 中国钢铁期刊网, 2016, 35(6): 63-66.
ZHANG Jin-wen，，WANG Wen-xian，LI Jian-jun，CHEN Jin-hu，WANG Yu-tian. Causes analysis and improvement of surface transversal cracks of S355NL continuous casting round bloom. Chinese Journal of Iron and Steel, 2016, 35(6): 63-66.
2016, Vol. 35 
