摘要
SS400钢连铸板坯在生产检验中常出现表面纵裂缺陷。对有裂纹的连铸板坯进行了高温塑性试验、低倍、金相组织和夹杂物分析。结果表明,钢水中硫含量高、钢中存在夹杂物、连铸板坯坯壳厚度不均匀、结晶器锥度和矫直温度不合理均可引起连铸板坯表面纵裂。提出了避免连铸板坯产生表面裂纹的措施。
Some longitudinal cracks on the surface of SS400 continuous casting slab were detected. The slabs with these cracks were analyzed by means of high temperature plasticity , macrostructure, microstructure and inclusion test. The results showed that the reasons caused the surface longitudinal cracks included the high content of rS3 in molten steel , the inclusions in slab, the variable slab surface shell thickness ,unreasonable mold taper and straightening temperature. Some ways to control the surface cracking in slab continuous casting were proposed.
出处
《连铸》
2009年第6期36-38,共3页
Continuous Casting
关键词
连铸板坯
表面纵裂
高温塑性
夹杂物
continuous casting slab
longitudinal surface cracking
high temperature plasticity
inclusion
