钒对HRB400钢筋应变时效及冲击性能的影响  

EFFECT OF VANADIUM CONTENT ON STRAIN-AGING AND IMPACT PROPERTIES OF HRB400 REINFORCED STEEL BARS

作　　者：吴比[1] 盛光敏[1] 龚士弘[1] 秦斌[1] 

机构地区：[1]重庆大学材料科学与工程学院,重庆400044

出　　处：《钢铁研究》2004年第3期10-12,21,共4页Research on Iron and Steel

摘　　要：对热轧和应变时效两种热处理状态的32mm钢筋试样进行了对比拉伸试验和冲击试验。结果表明 ,试验钢筋的应变时效敏感性较小 ,韧脆转变温度较高。应用电子显微分析查明 ,钢筋中的钒主要以合金渗碳体形态存在于珠光体中 ,钢筋中较低的氮含量使其应变时效敏感性较小 ,而过高的钒含量则使其冲击性能下降。Comparative tensile tests and impact tests were carried out for hot rolling and strain-aging steel bars with a diameter of 32?mm.The results show that the reinforced steel bars have lower strain-aging sensibility and higher ductile-brittle transition temperature.Based on electron microscope observations,most vanadium exists in pearlite as alloy cementite.Lower nitrogen in steel leads to the lower strain-aging sensibility and higher vanadium results in the decrease of impact property.Better shock strength can be obtained by using vanadium-nitrogen micro-alloying and control rolling technologies.

关 键 词：HRB400钢筋 应变时效 冲击性能 热轧 热处理 拉伸试验 冲击试验 

分 类 号：TG142[一般工业技术—材料科学与工程]