热等静压纯钒性能研究  

Study of performance of hot isostatic pressing pure vanadium

作　　者：叶林森[1] 鲜晓斌[1] 迟永刚[1] 胡文军[1] 张友寿[1] 谢茂林[1] 

机构地区：[1]中国工程物理研究院,四川绵阳612907

出　　处：《功能材料》2011年第B11期908-911,共4页Journal of Functional Materials

基　　金：中国工程物理研究院重大基金资助项目(2007A04001)

摘　　要：采用热等静压技术（HIP）制备纯钒,利用动态拉伸,扫描电镜（SEM）、金相（OM）及TGA测试分析材料的动态损伤行为、焊接性能及高温氧化性能。结果表明动态拉伸应变率在100~1200s-1范围内,极限拉伸强度σb在400~700MPa且随应变率增加而呈下降的趋势;焊后漏率约为1×10-9Pa.m3/s,晶粒没有明显长大,焊池越深气孔明显减小;高温氧化符合抛物线规律,氧化激活能118kJ/mol,高温环境下易形成粉状腐蚀。The pure vanadium specimen was prepared by hot isostatic pressing（HIPing）.The dynamic damage,welding,high temperature oxidation properties of pure vanadium were analyzed by dynamic tensile,optical microscope（OM）,scanning electron microscope（SEM）,and thermogravimetric analysis（TGA）.The results show that the ultimate dynamic tensile strength is 400-700MPa and descends at a range of strain ratio.The leakage ratio is 1×10-9Pa·m3/s,and the grains grown unobvious,and the welding porosity decreased at range of welding depths after the pure vanadium welding.The high temperature oxidation processes follow parabolic kinetics.The activation energy for the oxidation process is 118kJ/mol.The pure vanadium is easy to form chalked corrosion on condition of high temperature.

关 键 词：热等静压 纯钒 动态损伤 焊接性能 高温氧化 

分 类 号：TG146.40[一般工业技术—材料科学与工程]