Hydrogenation and Dehydrogenation Analysis for Nb47Ti Bars

摘要:

利用RH600热导式氢分析仪对尺寸为Φ50 mm×40 mm 的Nb47Ti合金试样在RX-460型工业电炉中做不同制度热处理后的氢含量变化进行了系统分析，对防止Nb47Ti合金热处理过程中吸氢现象提出了有效的解决措施。结果表明，Nb47Ti合金的吸氢现象主要发生在1200 ℃高温热处理的环节，在随后的 950，930和 900 ℃进行的热处理过程不会使 Nb47Ti 合金吸氢。Nb47Ti合金热加工过程中氢元素增加是由于在1200 ℃高温条件下加热炉内稀薄的含氢气氛和Nb及Ti元素物理化学性能比较活泼的综合作用造成的。6×10-2 Pa条件下，800 ℃/3 h 和 800 ℃/6 h真空热处理制度使原始H含量为 60 μg/g 的Nb47Ti合金的氢含量分别降低到 21和 29 μg/g

Abstract:

The equipment of RH600 Hydrogen Analyzer (Fusion) was adopted to measure the hydrogen content of Nb47Ti alloy bars, with Φ50 mm×40 mm after different annealing processes in RX-460 electric furnace. Based on the analysis results, a dehydrogenation method was proposed. The results indicate that the main hydrogenation takes place at the annealing temperature of 1200 oC, while the hydrogenation can not occur in the subsequent annealing at 950, 930 and 900 oC. The hydrogenation phenomenon occurring in Nb47Ti alloy is mainly attributed to the joint effect of the high activity constituent elements and the rare hydrogen atmosphere. The 800 oC/3 h and 800 oC/6 h vacuum heat treatment can reduce the hydrogen content in Nb47Ti alloy effectively from 60 μg/g to 21 and 29 μg/g, respectively