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中文摘要：
在热氢处理（THP）的基础上提出了液态置氢的方法,即合金在含氢气的气氛下进行熔炼,部分氢被合金吸收,并在凝固后保留在合金的内部。由于氢在液态合金中的扩散系数较大,因此液态置氢的速度较快。本研究基于Sievert’t定律推导出了液态置氢时,TC21合金中的氢含量与环境中的氢分压的关系。发现氢细化了TC21合金的晶粒,并且细化作用随着氢含量的增加而增强,随着氢含量的进一步增加,TC21合金中出现了α＂相和孪晶结构。合金的显微硬度随氢含量的增加而降低。
英文摘要：
Melt hydrogenation was presented based on thermal hydrogenation processing（THP）.Titanium alloy was melted in H2/Ar gaseous mixture.Part of hydrogen was absorbed by the alloy after cooling.Compared with THP,the hydrogenation process was very fast because of the big diffusion coefficient in melt alloy.The relationship between hydrogen content in TC21 alloy and partial pressure of H2 was deduced based on Sievert＇s law.It is found that the grain size and microhardness of TC21 alloy are decreased with more hydrogen.With the hydrogen content further increasing,α＂ phase and twining structure is detected in the alloy.
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