摘要
通过化学成分、金相观察、扫描电镜和EDS分析,对某钢公司生产的20MnSi热轧带肋钢筋出现的冷弯断裂现象进行了研究。结果表明:钢材中C、Si、Mn元素含量超标,存在非金属夹杂物、粒状贝氏体和魏氏组织是导致热轧带肋钢筋冷弯断裂的主要原因。结合生产工艺,论述了非金属夹杂物、化学成分、粒状贝氏体和魏氏组织对钢筋冷弯断裂的影响机理。
By the observation and analysis of chemical composition, microstructure, SEM （scanning electron microscope） and EDS （energy dispersive X-ray spectrometry） , the cold bending fracture of 20MnSi hot rolling ribbed steel bar was researched. The results show that the key reason for cold bending fracture is due to C, Si, Mn elements of excessive levels of steel, existing non-metallic inclusions, granular bainite and Widmanstatten structure. Combining with production process,the influence mechanism of non-metallic inclusion, chemical composition, granular bainite and Widmanstatten structure on the cold bending fracture of steels was discussed.
出处
《热加工工艺》
CSCD
北大核心
2013年第1期230-232,234,共4页
Hot Working Technology
关键词
热轧带肋钢筋
冷弯断裂
粒状贝氏体
魏氏组织
非金属夹杂物
hot rolling ribbed steel bars
cold-bending fracture
granular bainite
Widmannstatten structure
non-metallic inclusions
