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研究了不同温度下淬火对40Ti-40V-10Cr-10Mn合金微观结构和储氢特性的影响。结果表明,未经淬火的样品为体心立方V基固溶体,具有两个位置相近的特征衍射峰,分别对应于BCC-1相和BCC-2相;经1 473K淬火的样品仅由BCC-1相构成;经1 573K和1 673K淬火的样品均由BCC-1相、BCC-2相和C14型Laves相(密排六方结构)构成。动力学机制研究表明,各样品吸氢反应均受化学反应控制,但动力学方程存在明显差异,故吸氢速度不同。随着淬火温度的升高,样品在室温下的吸氢量先减小后增大(1 573K淬火样品最小,1 673K淬火样品接近于未淬火样品),在室温下的放氢量、迟滞效应都得到逐步改善,在373K下的放氢量也是先减小后增大(1 573K淬火样品最小,1 673K淬火样品明显大于未淬火样品)。
The effects of quenching at different temperatures on the microstructure and hydrogen storage properties of 40Ti-40V-10Cr-10Mn alloy were studied. The results show that the quenched sample is a body-centered cubic V-based solid solution with two characteristic diffraction peaks near to BCC-1 phase and BCC-2 phase, respectively; the sample quenched at 1473K consists of BCC-1 Phase; the samples hardened at 1 573K and 1 673K consisted of BCC-1 phase, BCC-2 phase and C14-type Laves phase (hexagonal structure). Kinetic mechanism studies show that the hydrogen absorption reaction of each sample is controlled by chemical reaction, but the kinetic equation has obvious difference, so the hydrogen absorption rate is different. With the increase of the quenching temperature, the amount of hydrogen absorption in the sample first decreases and then increases (the minimum for the 1 573K quenched sample and the close proximity of the 1673K quenched sample to the unquenched sample), the amount of hydrogen released at room temperature, the hysteresis effect Both of them have been gradually improved. The amount of hydrogen released at 373K is also the first to decrease and then increase (1 573K is the smallest quenched sample, while 1 673K is obviously harder than the unquenched one).