摘要
采用金相、扫描电镜对低碳Cu P系稀土耐候钢连铸坯表面角部纵裂纹及热轧板冷弯断裂面进行了宏观观察;采用能谱及X射线波谱对角部纵裂纹开裂面上的夹杂物和热轧板带断裂面上的夹杂物进行了微区成分分析;通过Gleeble 1500试验机对铸坯试样进行了高温力学性能测试,同时分析测试了连铸结晶器宽、窄面上的热流,找出了低碳Cu P稀土耐候钢连铸坯表面纵裂纹及热轧板带冷弯断裂的主要成因。
The surface morphology of longitudinal crack at corner of slab and the crack morphology of cold bending for Cu-P-RE weathering steels were analyzed by metalographic examination and SEM. The feature of crack and the composition of inclusions on the surface of crack were detected by EMPA, and EDAX. High temperature mechanical properties test were carried and with Gleeble-1500. The heat flow both on wide side and narrow side of the slab were tested. The main causes of the surface longitudinal crack of slab and the crack of cold bending for Cu-P-RE weathering steels found out.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2005年第2期219-223,共5页
Journal of the Chinese Society of Rare Earths
基金
国家"十五"科技攻关项目(2002BA315A 5)
关键词
Cu-P-RE耐候钢
表面纵裂纹
夹杂物
成因分析
稀土
Cu-P-RE weathering steel
surface longitudinal crack
inclusion
cause analysis
rare earths
