热处理工艺是改变金属材料微观组织结构和性能的常用手段,考察了退火和淬火以及淬火加低温回火对用FeV80中间合金代替纯钒制备的V-60%（TiCrFeMn）贮氢合金循环性能的影响。与退火处理相比,合金初始吸放氢量和平台压在淬火后均出现下降,合金的容量保持率提高。通过淬火,合金的成分均匀性虽然得到了改善,但合金放氢后会出现TiH2化合物相,TiH2化合物相所储存的氢无法在测试条件下放出,导致淬火后合金放氢量偏小。淬火后再低温回火,消除了一部分晶格微应力,合金的性能有一定改善。
Heat treatment process is common means to change the microstructure and properties of metal.The paper investigated the annealing and quenching and tempering after quenching on the cycling performance of hydrogen storage alloys V-60%（TiCrFeMn） prepared by use of FeV80 master alloy instead of pure vanadium.Compared with annealing,the initial amount of hydrogen absorption and desorption plateau pressure both have a decrease for the quenched alloy,but the capacity retention of alloy has improved.Although the composition uniformity of the quenched alloy is improved,the highly thermodynamic stable TiH2 phase appeared in the quenched alloy results in the decrease of its hydrogen desorption amount.The hydrogen storage performance of the quenched alloy can be improved to a certain extent after tempering.
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