热处理Nb47Ti合金吸氢脱氢过程分析(英文)

Hydrogenation and Dehydrogenation Analysis for Nb47Ti Bars

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。6×10-2Pa条件下,800℃/3 h和800℃/6 h真空热处理制度使原始H含量为60μg/g的Nb47Ti合金的氢含量分别降低到21和29μg/g。

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 dehy- drogenation method was proposed. The results indicate that the main hydrogenation takes place at the annealing temperature of 1200 ℃, while the hydrogenation can not occur in the subsequent annealing at 950, 930 and 900 ℃. The hydrogenation phenomenon oc- curring in Nb47Ti alloy is mainly attributed to the joint effect of the high activity constituent elements and the rare hydrogen atmos- phere. The 800 ℃/3 h and 800 ℃/6 h vacuum heat treatment can reduce the hydrogen content in Nb47Ti alloy effectively from 60μg/g to 21 and 29 μg/g, respectively.