HRB400热轧带肋钢筋盘螺弯曲脆断原因分析  

Analysis on the Cause of Bending Brittle Fracture of HRB400 Hot-rolled Spiral bar with rib Plate

作　　者：赵小青 任卫华 李涛 Zhao Xiaoqing;Ren Weihua;Li Tao(Shaanxi Iron&Steel Group Hanzhong Iron&Steel Co.,Ltd.,Mianxian Shaanxi 724200)

机构地区：[1]陕钢集团汉中钢铁有限责任公司,陕西勉县724200

出　　处：《山西冶金》2019年第6期6-7,15,共3页Shanxi Metallurgy

摘　　要：某钢厂生产的HRB400盘螺钢筋在工地弯曲加工时,发生脆断现象。通过化学成分分析、金相检验、扫描电镜能谱仪分析以及力学性能等检验,分析该钢筋弯曲脆断原因。结果表明:由于锰偏析引起的马氏体异常组织,使得钢筋强度变高,塑性变差,产生弯曲脆断现象。When HRB400 spiral steel bars produced by a steel plant are bent and processed in the construction site,brittle fracture occurs. Through the analysis of chemical composition, metallography, SEM and mechanical properties,the reason of bending brittle fracture of the steel bar was analyzed. The results show that the abnormal structure of martensite caused by manganese segregation makes the strength of steel bars higher, the plasticity worse and the bending brittle fracture phenomenon occurs.

关 键 词：热轧带肋钢筋 脆断 锰偏析 马氏体 

分 类 号：TG335.64[金属学及工艺—金属压力加工] TG115