Analysis on the Cause of Longitudinal Crack on the Hot-Rolled Ribbed Bar Surface
FAN Jun1，ZHAO Jun-xue1，CHEN Yuan-ping2，ZHAI Ke-yong1，Li Hui-juan1
（1. School of Metallurgical Engineering， Xi’an University of Architecture and Technology， Shaanxi Xi’an 710055， China 2. Haixin Iron and Steel Group Co., Ltd.， Shanxi Wenxi 043801， China）
Abstract：To find the main reason of longitudinal crack on HRB335 hot-rolled ribbed bar surface in cold bending process, continuously cast product macro-acid etching test，metallographic examination，scanning electron microscope and EDAX were carried out . It is regarded that the defect is mainly caused by serious subsurface blowholes and internal cracks in the cast product, which run through the surface in the later hot working process and is oxidized. As a result, the defects can not be welded in the rolling process and the cracks happen finally. The causes of subsurface blowhole and cracks in the production process were discussed, and some suggestions to improve the production process were given.
樊君，赵俊学，陈元平，翟克勇，李惠娟. HRB335热轧带肋钢筋表面纵向裂纹原因分析[J]. 钢铁, 2012, 47(2): 96-100.
FAN Jun1，ZHAO Jun-xue1，CHEN Yuan-ping2，ZHAI Ke-yong1，Li Hui-juan1. Analysis on the Cause of Longitudinal Crack on the Hot-Rolled Ribbed Bar Surface. Iron and Steel, 2012, 47(2): 96-100.
2012, Vol. 47 
