HRB400抗震钢筋韧脆转变温度测试分析  

TESTING AND ANALYSING FOR DUCTILE-BRITTLE TRANSITION TEMPERATURE OF HRB400 ANTI-SEISMIC STEEL BAR

作　　者：秦斌[1] 盛光敏[1] 龚士弘[1] 

机构地区：[1]重庆大学材料科学与工程学院,重庆400044

出　　处：《钢铁钒钛》2003年第4期59-63,共5页Iron Steel Vanadium Titanium

摘　　要：25mm、 32mm两种规格HRB400抗震钢筋的系列冲击试验表明,大规格试验钢筋的韧脆转变温度较高。由光学显微镜观察和断口扫描,发现 32mm钢筋的晶粒较为粗大、在12℃条件下主要为脆性断裂,借助透射电镜分析了钒在钢筋中的存在形式和分布情况。建议采用钒氮合金化与控制轧制相结合的措施来提高HRB400钢筋的低温冲击性能。Series of impact test for HRB400 anti-seismic steel bars with diameters of 25 mm and 32 mm dedicate the ductile-brittle transition temperature of big size steel bars are higher than small ones. Light microscope observation reveals the 32 mm steel bar has coarse grain , SEM show brittle fracture take place at 12 ℃. TEM was used to analyze the form and distribution of vanadium, then vanadium-nitrogen alloying and controlled rolling was brought forward as a suggest to enhance the impact property of HRB400 steel bars at low temperature.

关 键 词：HRB400抗震钢筋 韧脆转变温度 钒氮合金 微合金化 冲击试验 低温冲击性能 

分 类 号：TG142.1[一般工业技术—材料科学与工程]