旋锻对粉末冶金钒基储氢合金性能的影响

Effect of Rotary Forging on Properties of Powder Metallurgy Vanadium-based Hydrogen Storage Alloy

为了改善粉末冶金钒基储氢合金的性能,本文对粉末冶金V3TiNi0.56钒基储氢合金进行了旋锻,并进行了合金试样的充放电循环试验、碱液腐蚀试验和显微组织分析。结果表明,与粉末冶金合金试样相比,经过旋锻后的合金内部晶粒细化,充放电循环20次的放电容量衰减率减小21%,腐蚀电位正移38 mV。旋锻可显著改善粉末冶金V3TiNi0.56钒基储氢合金的充放电循环稳定性和耐碱液腐蚀性能。

In order to improve the performance of powder metallurgy vanadium-based hydrogen storage alloy,the rotating forging of powder metallurgy VV3TiNi0.56 vanadium-based hydrogen storage alloy was carried out. The charge-discharge cycle test, alkali corrosion test and microstructure analysis of the alloy samples were carried out. The results show that compared with that of the powder metallurgy alloy sample, the grain of the alloy after the rotary forging is refined, the discharge capacity decay rate after 20 times charge-discharge cycles is decreased by 21%, and the corrosion potential is positively shifted by 38 mV. Rotating forging can significantly improve the charge-discharge cycle stability and alkali corrosion resistance of powder metallurgy V3TiNi0.56 vanadium-based hydrogen storage alloy.