高铌钛合金铸锭的真空自耗熔炼

Method of Vacuum Arc Remelting for the Titanium Alloy Ingot with high Niobium Content

含铌钛合金在生物医用、耐蚀、超导及高铌钛铝基金属间化合物等领域的应用日益广泛,在工业化生产条件下,目前生产此类合金最为经济和有效的方法是真空自耗电弧熔炼法(VAR),真空自耗熔炼高铌含量钛合金的主要问题是容易产生Nb夹杂缺陷。本文以Ti-50Nb二元合金作为研究对象,从VAR生产中的原料选择、电极制备、熔炼参数控制等工艺过程出发,结合理论分析和实验研究,提出了消除Ti-50Nb合金铸锭中的Nb夹杂缺陷的措施,并通过验证试验获得了完全无缺陷的Ti-Nb合金铸锭,研究结果对获得高品质含铌钛合金铸锭具有一定的实践指导意义。

The titanium alloys contain niobium in the applications of the medical,anti-corrosion,superconductive and the titanium-aluminum intermetallic compounds are increasing widely in recent years.The vacuum arc remelting(VAR)is the most economical and efficiency way to produce these kinds of titanium alloys under the current industrial conditions.The main problem for produce these titanium alloys is cannot to avoid the defect of niobium inclusions easily.The whole VAR process for Ti-50Nb alloy was investigated in this article,including the selection of raw materials,electrode preparation and the control of remelting parameters,also some theoretical analysis and experiments were carried out to find out the way to avoid the niobium inclusions.The niobium inclusion in the final test ingot were completely eliminated,due to some affective improvements for the processing were used.The high quality of all these kind of ingots without niobium inclusions,can be obtained by following those significant results.