摘要
通过电炉→LF→VD流程冶炼的低碳高锰钢浇注成300mm×360mm大方坯后,在铸坯表面发现裂纹.利用光学显微镜、扫描电镜及能谱分析仪对铸坯表面裂纹进行分析,发现裂纹的产生与钢的化学成分、钢中夹杂物、钢水温度、保护渣和析出物等因素有关.在实际生产中可以从钢水窄成分控制,提高钢水洁净度,合理控制钢水温度,采用结晶器专用保护渣等方面来提高连铸坯表面质量.
The surface cracks on the 300 mm × 360 mm continuous casting bloom of low carbon and high manganese steel made by electric-arc furnace( EAF),ladle furnace( LF),and vacuum decarburization( VD) processes were found after cooling. The formation of surface crack was investigated by optical microscopy,scanning electron microscope( SEM) and energy dispersive spectrometer( EDS). The results indicated that surface crack was related to the chemical composition of the steel,the inclusions,the temperature of the steel,the mold fluxes,and the precipitates. Controlling the chemical composition of the steel,decreasing the amount of inclusions,controlling the temperature of the steel reasonably,and using special mold flux can promote the surface quality of the casting bloom in some degree.
出处
《工程科学学报》
EI
CAS
CSCD
北大核心
2014年第S1期89-92,共4页
Chinese Journal of Engineering
基金
国家自然基金资助项目(51274032)
关键词
低碳高锰钢
大方坯
表面裂纹
low carbon and high manganese steel
casting bloom
surface crack
