Cause analysis on drawing defects of high-quality carbon structural steel wire rod
WANG Hong-po1,2，XIONG Lu1，WANG Yu1，ZHU Ming-mei1，SHU Yi-yi2，ZHOU Yuan-hua2
1. College of Materials Science and Engineering， Chongqing University， Chongqing 400044， China 2. Institute of Iron and Steel， Chongqing Iron and Steel Co.， Ltd.， Chongqing 401258， China
Abstract：In order to avoid drawing defects of general fracture，pen-tip shaped fracture， decrustation and scallop in drawing process of wire rods for high-quality carbon structural steel， i.e. 70 and 80 steel in the present work， optical microstructures， Vickers hardness and non-metallic inclusions were detected to investigate the causes of the drawing defects. The results show that slag inclusions at local surface of steel billet generate the defects of decrustation and scallop， and the latter is transformed from the former. On the other hand， SiO2-based inclusions with large size produced by reoxidation of liquid steel in continuous casting process lead to the destruction of steel matrix and the pen-tip shaped fracture. Additionally， surface defects induced by unreasonable drawing process are the key reason for general fracture.
王宏坡，熊 路，王 雨，祝明妹，舒遗一，周远华. 优质碳素结构钢盘条拉拔缺陷原因分析[J]. 中国钢铁期刊网, 2016, 35(4): 47-54.
WANG Hong-po，，XIONG Lu，WANG Yu，ZHU Ming-mei，SHU Yi-yi，ZHOU Yuan-hua. Cause analysis on drawing defects of high-quality carbon structural steel wire rod. Chinese Journal of Iron and Steel, 2016, 35(4): 47-54.
2016, Vol. 35 
