纯钒制备及其性能  

Study on Preparation and Properties of Pure Vanadium

作　　者：鲜晓斌[1] 叶林森[1] 冷邦义[1] 谢东华[1] 谢茂林[1] 迟永刚[1] 

机构地区：[1]中国工程物理研究院,四川绵阳612907

出　　处：《稀有金属材料与工程》2010年第5期928-931,共4页Rare Metal Materials and Engineering

基　　金：中国工程物理研究院院重大基金(2007A04001)

摘　　要：采用热等静压(HIP)技术制备纯钒,利用材料试验机、OM、SEM、TEM和TGA等测试纯钒的力学性能并观察其拉伸断口形貌、进行热重分析。结果表明:热等静压温度在1250℃以上可以实现全致密化;随温度的升高,抗拉强度、屈服强度均先降低后增加,延伸率及断面收缩率呈相反趋势变化,在1250℃综合性能最佳,抗拉强度、屈服强度分别为701,634MPa,延伸率为22.4%;断口形貌表现出滑断、微孔聚集等不同的断裂方式,不同温度制备的纯钒试样晶粒大小没有显著变化,均观察到板条马氏体组织存在;氧化行为符合抛物线规律,活化能为118kJ/mol。The pure vanadium was prepared by hot isostatic pressing（HIPing）.The mechanical properties of the pure vanadium were examined and the tensile fracture,microstructure and thermal change of the specimen were analyzed by a material testing machine,OM,SEM,TEM and TGA.The results show that pure vanadium can be up to full densification at the HIPing temperature above 1250℃.With increasing of the temperature,the tensile strength and yield strength decreases at first and then increases,but the plasticity change is on the contrary.Its comprehensive mechanical properties are best at 1250℃,e.g.the tensile and yield strength are 701 MPa and 634 MPa,respectively,and the elongation is up to 22.4%.Fracture of the specimens happens in the modes of slipping off or micro-porous aggregation.The grain sizes of pure vanadium prepared at different temperatures are similar,and lath-like martensite is observed in all of the specimens.The oxidation processes follow parabolic kinetics,whose activation energy is 118 kJ/mol.

关 键 词：热等静压 纯钒 性能 组织 氧化 

分 类 号：TF841.3[冶金工程—有色金属冶金]