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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 RH600 thermal conductivity hydrogen analyzer was used to analyze the variation of the hydrogen content of the Nb47Ti alloy sample with the dimension of Φ50 mm × 40 mm after the different heat treatment in the RX-460 type industrial electric furnace. In order to prevent the Nb47Ti alloy from being heat- Hydrogen absorption presents an effective solution. The results show that the hydrogen absorption of Nb47Ti alloy occurs mainly in the high temperature heat treatment at 1200 ℃. The subsequent heat treatment at 950, 930 and 900 ℃ will not hydrogenate Nb47Ti alloy. The increase of hydrogen element in the heat treatment of Nb47Ti alloy is attributed to the combined effect of the thin hydrogen-containing atmosphere in the furnace at 1200 ℃ and the relatively active physico-chemical properties of Nb and Ti elements. Under the condition of 6 × 10-2Pa, the hydrogen content of Nb47Ti alloy with initial H content of 60μg / g was reduced to 21 and 29μg / g respectively by vacuum heat treatment at 800 ℃ / 3h and 800 ℃ / 6h.