钒基贮氢合金的公斤级熔炼工艺与性能改善

Melting processes and performance improvement of kilogram-grade V-based BCC hydrogen storage alloy

研究了V-60%(TiCrFeMn)贮氢合金的公斤级熔炼工艺和热处理工艺,采用真空中频感应和非自耗真空电弧熔炼两种不同的熔炼方法制备公斤级钒基贮氢合金,采用高温退火方法改善合金的性能。结果表明,采用真空中频感应熔炼的合金由于熔炼过程中合金液与坩埚反应,致使合金含氧量过高,合金性能恶化,而采用非自耗真空电弧熔炼的合金表现出优良的吸放氢性能,初始吸氢量为3.69%(质量分数),放氢量达到了2.25%(质量分数),平台压为0.45MPa。

In this paper,the effect of melting processes（vacuum induction and non-consumable vacuum arc melting） on the microstructure and hydrogen storage performance of kilogram-grade V-60%（TiCrFeMn） hydrogen storage alloys were investigated.The results show that the performance of alloy melted by medium frequency induction deteriorates because its oxygen content is too high,which results from the reaction of the liquid alloy and the crucible during melting process.The alloy made by non-consumable vacuum arc melting has a much better performance,where the initial hydrogen absorption and desorption capacity is 3.69% and 2.25wt% respectively,and the hydrogen desorption plateau pressure is 0.45MPa.