HRB500钢筋中V的析出动力学研究  

Experimental Investigation of Precipitation Dynamics of Vanadium in HRB500 Rebar

作　　者：张新建[1] 盛光敏[2] 

机构地区：[1]首钢水城钢铁(集团)有限责任公司,贵州六盘水553028 [2]重庆大学材料科学与工程学院,重庆400044

出　　处：《钢铁钒钛》2015年第4期30-35,共6页Iron Steel Vanadium Titanium

基　　金：贵州省科技重大专项"高性能钢筋产业化及在高墩大跨度桥梁中的示范应用"(黔科合重大专项字[2011]6014)

摘　　要：采用应力松弛法对模拟轧制变形后HRB500钢筋中钒的析出动力学进行研究。结果表明,在轧后恒温、恒应变的应力松弛曲线上分别出现了两个拐点,分别对应着钒的开始析出点和析出终了点。钒的析出动力学曲线(析出-温度-时间曲线或PTT曲线)呈明显的C形。随轧制变形量的增加,PTT曲线朝左下方移动。当轧制变形量大于0.2时,钒析出孕育期最短的温度为870℃左右,整个析出过程在3 s内完成。用透射电镜对析出相进行了观察。The precipitation dynamics of vanadium in HRB500 rebar after rolling deformation was investigated experimentally by stress relaxation method. The test results show that two turning points appear in the stress relaxation curves under constant temperature and strain after rolling,which correspond to the starting and finishing of precipitation of vanadium respectively. The precipitation-temperature-time（ PTT）curves of vanadium present the C shape. With the increment of rolling deformation,the PTT curves move toward the left lower direction. When the rolling deformation is larger than 0. 2,the fastest precipitation temperature of vanadium is about 870 ℃,and the precipitation can be finished within 3 sec. Finally,the precipitation particles were observed under TEM.

关 键 词：HRB500钢筋 钒 析出动力学 应力松弛 

分 类 号：TG142.1[一般工业技术—材料科学与工程] TG335.64[金属学及工艺—金属材料]